Document and Entity Information - USD ($)	12 Months Ended
Document and Entity Information - USD ($)	Dec. 31, 2017	Feb. 23, 2018	Jun. 30, 2017
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	FY
Trading Symbol	BCOV
Entity Registrant Name	BRIGHTCOVE INC
Entity Central Index Key	0001313275
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		34,952,140
Entity Public Float			$ 130,976,463

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 26,132	$ 36,813
Accounts receivable, net of allowance of $146 and $154 at December 31, 2017 and December 31, 2016, respectively	25,236	21,575
Prepaid expenses	3,991	3,729
Other current assets	3,045	2,168
Total current assets	58,404	64,285
Property and equipment, net	9,143	9,264
Intangible assets, net	8,236	10,970
Goodwill	50,776	50,776
Deferred tax asset	87	121
Other assets	969	1,008
Total assets	127,615	136,424
Current liabilities:
Accounts payable	6,142	5,327
Accrued expenses	13,621	15,705
Capital lease liability	228	489
Equipment financing	26	307
Deferred revenue	39,370	34,665
Total current liabilities	59,387	56,493
Deferred revenue, net of current portion	244	91
Other liabilities	1,228	1,644
Total liabilities	60,859	58,228
Commitments and contingencies (Note 5)
Stockholders' equity:
Undesignated preferred stock, $0.001 par value; 5,000,000 shares authorized; no shares issued
Common stock, $0.001 par value; 100,000,000 shares authorized; 34,933,408 and 34,143,148 shares issued at December 31, 2017 and 2016, respectively	35	34
Additional paid-in capital	238,700	230,788
Treasury stock, at cost; 135,000 shares	(871)	(871)
Accumulated other comprehensive loss	(809)	(1,172)
Accumulated deficit	(170,299)	(150,583)
Total stockholders' equity	66,756	78,196
Total liabilities and stockholders' equity	$ 127,615	$ 136,424

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Allowance for accounts receivable	$ 146	$ 154
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	34,933,408	34,143,148
Treasury stock, shares	135,000	135,000

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenue:
Subscription and support revenue	$ 143,159	$ 142,022	$ 131,010
Professional services and other revenue	12,754	8,244	3,696
Total revenue	155,913	150,266	134,706
Cost of revenue:
Cost of subscription and support revenue	50,664	48,011	41,735
Cost of professional services and other revenue	13,954	7,836	4,742
Total cost of revenue	64,618	55,847	46,477
Gross profit	91,295	94,419	88,229
Operating expenses:
Research and development	31,850	30,171	29,302
Sales and marketing	57,294	54,038	45,795
General and administrative	21,847	19,167	19,862
Merger-related		21	201
Total operating expenses	110,991	103,397	95,160
Loss from operations	(19,696)	(8,978)	(6,931)
Other income (expense):
Interest income	124	99	6
Interest expense	(26)	(63)	(96)
Other income (expense), net	449	(634)	(168)
Total other income (expense), net	547	(598)	(258)
Loss before income taxes	(19,149)	(9,576)	(7,189)
Provision for income taxes	370	410	391
Net loss	$ (19,519)	$ (9,986)	$ (7,580)
Net loss per share - basic and diluted	$ (0.57)	$ (0.30)	$ (0.23)
Weighted-average number of common shares used in computing net loss per share - basic and diluted	34,376	33,189	32,598
Amortization of acquired intangible assets included in above line items:
Amortization of acquired intangible assets	$ 2,734	$ 3,116	$ 3,112
Cost of Subscription and Support Revenue [Member]
Stock-based compensation included in above line items:
Stock-based compensation	439	324	181
Amortization of acquired intangible assets included in above line items:
Amortization of acquired intangible assets	2,031	2,031	2,031
Cost of Professional Services and Other Revenue [Member]
Stock-based compensation included in above line items:
Stock-based compensation	251	217	181
Research and Development [Member]
Stock-based compensation included in above line items:
Stock-based compensation	1,563	1,275	1,392
Amortization of acquired intangible assets included in above line items:
Amortization of acquired intangible assets	11	126	126
Sales and Marketing [Member]
Stock-based compensation included in above line items:
Stock-based compensation	2,750	2,320	2,155
Amortization of acquired intangible assets included in above line items:
Amortization of acquired intangible assets	692	959	955
General and Administrative [Member]
Stock-based compensation included in above line items:
Stock-based compensation	$ 2,240	$ 1,876	$ 2,105

Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of Comprehensive Income [Abstract]
Net loss	$ (19,519)	$ (9,986)	$ (7,580)
Other comprehensive (loss) income:
Foreign currency translation adjustments	363	(284)	(112)
Comprehensive loss	$ (19,156)	$ (10,270)	$ (7,692)

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income [Member]	Accumulated Deficit [Member]
Beginning Balance at Dec. 31, 2014	$ 80,763	$ 32	$ 214,524		$ (776)	$ (133,017)
Beginning Balance, shares at Dec. 31, 2014		32,424,554
Issuance of common stock upon exercise of stock options	129		129
Issuance of common stock upon exercise of stock options, shares		58,449
Issuance of common stock pursuant to restricted stock units	1	$ 1
Issuance of common stock pursuant to restricted stock units, shares		327,628
Return of common stock issued pursuant to settlement agreement	(871)			$ (871)
Treasury shares, beginning Balance at Dec. 31, 2014				(135,000)
Withholding tax on restricted stock units vesting	$ (209)		$ (209)
Withholding tax on restricted stock units vesting, shares	0	0	0	0	0	0
Stock-based compensation expense	$ 6,014		$ 6,014
Foreign currency translation adjustment	(112)				$ (112)
Net loss	(7,580)					$ (7,580)
Ending Balance at Dec. 31, 2015	78,135	$ 33	220,458	$ (871)	$ (888)	$ (140,597)
Ending Balance, shares at Dec. 31, 2015		32,810,631
Treasury stock, Ending Balance at Dec. 31, 2015				(135,000)
Issuance of common stock upon exercise of stock options	4,555	$ 1	4,554
Issuance of common stock upon exercise of stock options, shares		886,085
Issuance of common stock pursuant to restricted stock units, shares		425,904
Withholding tax on restricted stock units vesting	$ (405)		$ (405)
Withholding tax on restricted stock units vesting, shares	0	0	0	0	0	0
Stock-based compensation expense	$ 6,181		$ 6,181
Issuance of common stock upon net exercise of stock warrants	0	$ 0	0	$ 0	$ 0	$ 0
Issuance of common stock upon net exercise of stock warrants, shares		20,528
Foreign currency translation adjustment	(284)				(284)
Net loss	(9,986)					(9,986)
Ending Balance at Dec. 31, 2016	$ 78,196	$ 34	230,788	$ (871)	$ (1,172)	$ (150,583)
Ending Balance, shares at Dec. 31, 2016		34,143,148
Treasury stock, Ending Balance at Dec. 31, 2016	(135,000)			(135,000)
Issuance of common stock upon exercise of stock options	$ 520		520
Issuance of common stock upon exercise of stock options, shares		229,127
Issuance of common stock pursuant to restricted stock units		$ 1	(1)
Issuance of common stock pursuant to restricted stock units, shares		561,133
Withholding tax on restricted stock units vesting	$ (268)		$ (268)
Withholding tax on restricted stock units vesting, shares	0	0	0	0	0	0
Stock-based compensation expense	$ 7,464		$ 7,464
Foreign currency translation adjustment	363				$ 363
Net loss	(19,519)					$ (19,519)
Ending Balance at Dec. 31, 2017	$ 66,756	$ 35	238,700	$ (871)	$ (809)	(170,299)
Ending Balance, shares at Dec. 31, 2017		34,933,408
Treasury stock, Ending Balance at Dec. 31, 2017	(135,000)			(135,000)
Impact of adoption of ASU 2016-09 as of January 1, 2017			$ 197			$ (197)

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating activities
Net loss	$ (19,519)	$ (9,986)	$ (7,580)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation and amortization	7,257	7,796	8,687
Stock-based compensation	7,243	6,012	6,014
Deferred income taxes	38	(47)	(27)
Provision for reserves on accounts receivable	203	230	408
Loss on disposal of equipment		155	68
Gain from settlement of escrow claim			(871)
Changes in assets and liabilities:
Accounts receivable	(3,811)	(559)	(157)
Prepaid expenses and other current assets	(1,484)	(894)	680
Other assets	56	(299)	(256)
Accounts payable	1,758	733	1,751
Accrued expenses	(2,930)	3,172	137
Deferred revenue	4,748	4,764	227
Net cash (used in) provided by operating activities	(6,441)	11,077	9,081
Investing activities
Cash paid for purchase of intangible asset		(300)
Purchases of property and equipment, net of returns (Note 2)	(1,102)	(1,307)	(1,390)
Capitalized internal-use software costs	(3,010)	(3,887)	(1,456)
Decrease in restricted cash		201
Net cash used in investing activities	(4,112)	(5,293)	(2,846)
Financing activities
Proceeds from exercise of stock options	520	4,555	129
Payments of withholding tax on RSU vesting	(268)	(405)	(209)
Proceeds from equipment financing		604	1,704
Payments on equipment financing (Note 8)	(307)	(271)	(1,704)
Payments under capital lease obligation	(489)	(850)	(1,332)
Net cash (used in) provided by financing activities	(544)	3,633	(1,412)
Effect of exchange rate changes on cash and cash equivalents	416	(241)	(102)
Net (decrease) increase in cash and cash equivalents	(10,681)	9,176	4,721
Cash and cash equivalents at beginning of period	36,813	27,637	22,916
Cash and cash equivalents at end of period	26,132	36,813	27,637
Supplemental disclosure of cash flow information
Cash paid for income taxes	500	351	263
Cash paid for interest	26	63	96
Supplemental disclosure of non-cash operating activities
Capitalization of stock-based compensation related to internal use software	221	169
Supplemental disclosure of non-cash investing and financing activities
Unpaid internal-use software costs	28	20	38
Unpaid purchases of property and equipment	$ 138	$ 83	$ 1,177

Business Description	12 Months Ended
Business Description	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business Description	1. Business Description Brightcove Inc. (the Company) is a leading global provider of cloud services for video which enable its customers to publish and distribute video to Internet-connected devices quickly, easily and in a cost-effective and high-quality manner. The Company is headquartered in Boston, Massachusetts and was incorporated in the state of Delaware on August 24, 2004. At December 31, 2017, the Company had nine wholly-owned subsidiaries: Brightcove UK Ltd, Brightcove Singapore Pte. Ltd., Brightcove Korea, Brightcove Australia Pty Ltd, Brightcove Holdings, Inc., Brightcove Kabushiki Kaisha (Brightcove KK), Zencoder Inc. (Zencoder), Brightcove FZ-LLC, and Cacti Acquisition LLC.

Summary of Significant Accounting Policies

12 Months Ended

Dec. 31, 2017

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

2. Summary of Significant Accounting Policies

The accompanying consolidated financial statements reflect the application of certain significant accounting policies as described below and elsewhere in these notes to the consolidated financial statements.

The Company believes that a significant accounting policy is one that is both important to the portrayal of the Company’s financial condition and results, and requires management’s most difficult, subjective, or complex judgments, often as the result of the need to make estimates about the effect of matters that are inherently uncertain.

Basis of Presentation

The accompanying consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (GAAP). Any reference in these notes to applicable guidance is meant to refer to the authoritative United States generally accepted accounting principles as found in the Accounting Standards Codification (ASC) and Accounting Standards Update (ASU) of the Financial Accounting Standards Board (FASB).

Use of Estimates and Uncertainties

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts expensed during the reporting period.

Significant estimates relied upon in preparing these consolidated financial statements include revenue recognition and revenue reserves, allowances for doubtful accounts, contingent liabilities, the expensing and capitalization of research and development costs for internal-use software, intangible asset valuations, amortization periods, expected future cash flows used to evaluate the recoverability of long-lived assets, the determination of the fair value of stock awards issued, stock-based compensation expense, and the recoverability of the Company’s net deferred tax assets and related valuation allowance.

Although the Company regularly assesses these estimates, actual results could differ materially from these estimates. Changes in estimates are recorded in the period in which they become known. The Company bases its estimates on historical experience and various other assumptions that it believes to be reasonable under the circumstances. Actual results may differ from management’s estimates if these results differ from historical experience, or other assumptions do not turn out to be substantially accurate, even if such assumptions are reasonable when made.

The Company is subject to a number of risks and uncertainties common to companies in similar industries and stages of development including, but not limited to, rapid technological changes, competition from substitute products and services from larger companies, customer concentration, management of international activities, protection of proprietary rights, patent litigation, and dependence on key individuals.

Principles of Consolidation

The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation.

Subsequent Events Considerations

The Company considers events or transactions that occur after the balance sheet date but prior to the issuance of the financial statements to provide additional evidence for certain estimates or to identify matters that require additional disclosure. Subsequent events have been evaluated as required. The Company has evaluated all subsequent events and determined that there are no material recognized or unrecognized subsequent events.

Foreign Currency Translation

The reporting currency of the Company is the U.S. dollar. The functional currency of the Company’s foreign subsidiaries is the local currency of each subsidiary. All assets and liabilities in the balance sheets of entities whose functional currency is a currency other than the U.S. dollar are translated into U.S. dollar equivalents at exchange rates as follows: (1) asset and liability accounts at period-end rates, (2) income statement accounts at weighted-average exchange rates for the period, and (3) stockholders’ equity accounts at historical exchange rates. The resulting translation adjustments are excluded from income (loss) and reflected as a separate component of stockholders’ equity. Foreign currency transaction gains and losses are included in net loss for the period. The Company may periodically have certain intercompany foreign currency transactions that are deemed to be of a long-term investment nature; exchange adjustments related to those transactions are made directly to a separate component of stockholders’ equity.

Cash and Cash Equivalents

The Company considers all highly liquid investments with an original maturity of three months or less at the date of purchase to be cash equivalents. Management determines the appropriate classification of investments at the time of purchase, and re-evaluates such determination at each balance sheet date. The Company did not have any short-term or long-term investments at December 31, 2017 or 2016.

Cash and cash equivalents primarily consist of cash on deposit with banks and amounts held in interest-bearing money market accounts. Cash equivalents are carried at cost, which approximates their fair market value.

Cash and cash equivalents as of December 31, 2017 and 2016 consist of the following:


	December 31, 2017
Description	Contracted Maturity		Amortized Cost		Fair Market Value		Balance Per Balance Sheet
Cash		Demand	$	17,972	$	17,972	$	17,972
Money market funds		Demand		8,160		8,160		8,160

Total cash and cash equivalents			$	26,132	$	26,132	$	26,132


	December 31, 2016
Description	Contracted Maturity		Amortized Cost		Fair Market Value		Balance Per Balance Sheet
Cash		Demand	$	23,942	$	23,942	$	23,942
Money market funds		Demand		12,871		12,871		12,871

Total cash and cash equivalents			$	36,813	$	36,813	$	36,813

Disclosure of Fair Value of Financial Instruments

The carrying amounts of the Company’s financial instruments, which include cash, cash equivalents, accounts receivable, accounts payable, accrued expenses, capital lease liabilities and equipment financing, approximated their fair values at December 31, 2017 and 2016, due to the short-term nature of these instruments.

The Company has evaluated the estimated fair value of financial instruments using available market information and management’s estimates. The use of different market assumptions and/or estimation methodologies could have a significant impact on the estimated fair value amounts. See Note 4 for further discussion.

Revenue Recognition

The Company primarily derives revenue from the sale of its online video platform, which enables its customers to publish and distribute video to Internet-connected devices quickly, easily and in a cost-effective and high-quality manner. Revenue is derived from three primary sources: (1) the subscription to its technology and related support; (2) hosting, bandwidth and encoding services; and (3) professional services, which include initiation, set-up and customization services.

The Company recognizes revenue when all of the following conditions are satisfied: (1) there is persuasive evidence of an arrangement; (2) the service has been provided to the customer; (3) the collection of fees is probable; and (4) the amount of fees to be paid by the customer is fixed or determinable.

The Company’s subscription arrangements provide customers the right to access its hosted software applications. Customers do not have the right to take possession of the Company’s software during the hosting arrangement. Accordingly, the Company recognizes revenue in accordance with ASC 605, Revenue Recognition. Contracts for premium customers generally have a term of one year and are non-cancellable. These contracts generally provide the customer with a maximum annual level of usage, and provide the rate at which the customer must pay for actual usage above the annual allowable usage. For these services, the Company recognizes the annual fee ratably as revenue each month. Should a customer’s usage of the Company’s services exceed the annual allowable level, revenue is recognized for such excess in the period of the usage. Contracts for volume customers are generally month-to-month arrangements, have a maximum monthly level of usage and provide the rate at which the customer must pay for actual usage above the monthly allowable usage. The monthly volume subscription and support and usage fees are recognized as revenue during the period in which the related cash is collected.

Revenue recognition commences upon the later of when the application is placed in a production environment, or when all revenue recognition criteria have been met.

Professional services and other revenue sold on a stand-alone basis are recognized as the services are performed, subject to any refund or other obligation.

Deferred revenue includes amounts billed to customers for which revenue has not been recognized, and primarily consists of the unearned portion of annual software subscription and support fees, and deferred professional service fees.

Revenue is presented net of any taxes collected from customers.

Multiple-Element Arrangements

The Company periodically enters into multiple-element service arrangements that include platform subscription fees, support fees, and, in certain cases, other professional services.

The Company assesses arrangements with multiple deliverables under ASU No. 2009-13, Revenue Recognition (Topic 605), Multiple-Deliverable Revenue Arrangements — a Consensus of the FASB Emerging Issues Task Force, which amended the previous multiple-element arrangements accounting guidance. Pursuant to ASU 2009-13, objective and reliable evidence of fair value of the undelivered elements is no longer required in order to account for deliverables in a multiple-element arrangement separately. Instead, arrangement consideration is allocated to deliverables based on their relative selling price. The guidance also eliminated the use of the residual method.

In order to treat deliverables in a multiple-element arrangement as separate units of accounting, the deliverables must have stand-alone value upon delivery. If the deliverables have stand-alone value upon delivery, the Company accounts for each deliverable separately. Subscription services have stand-alone value as such services are often sold separately. In determining whether professional services have stand-alone value, the Company considers the following factors for each professional services agreement: availability of the services from other vendors, the nature of the professional services, the timing of when the professional services contract was signed in comparison to the subscription service start date, and the contractual dependence of the subscription service on the customer’s satisfaction with the professional services work. To date, the Company has concluded that all of the professional services included in multiple-element arrangements executed have stand-alone value.

When multiple deliverables included in an arrangement are separated into different units of accounting, the arrangement consideration is allocated to the identified separate units based on a relative selling price hierarchy. The Company determines the relative selling price for a deliverable based on its vendor-specific objective evidence of fair value (VSOE), if available, or its best estimate of selling price (BESP), if VSOE is not available. The Company has determined that third-party evidence of selling price (TPE) is not a practical alternative due to differences in its service offerings compared to other parties and the availability of relevant third-party pricing information. The amount of revenue allocated to delivered items is limited by contingent revenue, if any.

The Company has not established VSOE for its offerings due to the lack of pricing consistency, the introduction of new services and other factors. Accordingly, the Company uses its BESP to determine the relative selling price. The Company determines BESP by considering its overall pricing objectives and market conditions. Significant pricing practices taken into consideration include the Company’s discounting practices, the size and volume of the Company’s transactions, the geographic area where services are sold, price lists, historical contractually stated prices and prior relationships and future subscription service sales with certain classes of customers.

The determination of BESP is made through consultation with and approval by the Company’s management, taking into consideration the go-to-market strategy. As the Company’s go-to-market strategies evolve, the Company may modify its pricing practices in the future, which could result in changes in selling prices, including both VSOE and BESP. The Company analyzes the selling prices used in its allocation of arrangement consideration, at a minimum, on an annual basis. Selling prices are analyzed on a more frequent basis if a significant change in the Company’s business necessitates a more timely analysis or if the Company experiences significant variances in its selling prices.

Cost of Revenue

Cost of revenue primarily consists of costs related to supporting and hosting the Company’s product offerings and delivering professional services. These costs include salaries, benefits, incentive compensation and stock-based compensation expense related to the management of the Company’s data centers, customer support team and the Company’s professional services staff, in addition to third-party service provider costs such as data center and networking expenses, allocated overhead, amortization of capitalized internal-use software development costs and intangible assets and depreciation expense.

Allowance for Doubtful Accounts

The Company offsets gross trade accounts receivable with an allowance for doubtful accounts. The allowance for doubtful accounts is the Company’s best estimate of the amount of probable credit losses in the Company’s existing accounts receivable and is based upon historical loss patterns, the number of days that billings are past due, and an evaluation of the potential risk of loss associated with specific accounts. Account balances are charged against the allowance after all means of collection have been exhausted and the potential for recovery is considered remote. Provisions for allowances for doubtful accounts are recorded in general and administrative expense.

Below is a summary of the changes in the Company’s allowance for doubtful accounts for the years ended December 31, 2017, 2016 and 2015:


	Balance at Beginning of Period		Provision		Write-offs			Balance at End of Period
Year ended December 31, 2017	$	154	$	203	$	(211	)	$	146
Year ended December 31, 2016		332		230		(408	)		154
Year ended December 31, 2015		181		408		(257	)		332

Off-Balance Sheet Risk and Concentration of Credit Risk

The Company has no significant off-balance sheet risk, such as foreign exchange contracts, option contracts, or other foreign hedging arrangements. Financial instruments that potentially expose the Company to concentrations of credit risk consist primarily of cash, cash equivalents and trade accounts receivable. The Company maintains its cash and cash equivalents principally with accredited financial institutions of high credit standing. Although the Company deposits its cash with multiple financial institutions, its deposits, at times, may exceed federally insured limits. The Company routinely assesses the creditworthiness of its customers. The Company generally has not experienced any material losses related to receivables from individual customers, or groups of customers. The Company does not require collateral. Due to these factors, no additional credit risk beyond amounts provided for collection losses is believed by management to be probable in the Company’s accounts receivable.

For the years ended December 31, 2017, 2016 and 2015, no individual customer accounted for more than 10% of total revenue.

As of December 31, 2017 and 2016, no individual customer accounted for more than 10% of net accounts receivable.

Concentration of Other Risks

The Company is dependent on certain content delivery network providers who provide digital media delivery functionality enabling the Company’s on-demand application service to function as intended for the Company’s customers and ultimate end-users. The disruption of these services could have a material adverse effect on the Company’s business, financial position, and results of operations.

Software Development Costs

Costs incurred to develop software applications used in the Company’s on-demand application services consist of (a) certain external direct costs of materials and services incurred in developing or obtaining internal-use computer software, and (b) payroll and payroll-related costs for employees who are directly associated with, and who devote time to, the project. These costs generally consist of internal labor during configuration, coding, and testing activities. Research and development costs incurred during the preliminary project stage or costs incurred for data conversion activities, training, maintenance and general and administrative or overhead costs are expensed as incurred. Capitalization begins when the preliminary project stage is complete, management, with the relevant authority, authorizes and commits to the funding of the software project, it is probable the project will be completed, the software will be used to perform the functions intended and certain functional and quality standards have been met. Qualified costs incurred during the operating stage of the Company’s software applications relating to upgrades and enhancements are capitalized to the extent it is probable that they will result in added functionality, while costs that cannot be separated between maintenance of, and minor upgrades and enhancements to, internal-use software are expensed as incurred. These capitalized costs are amortized on a straight-line basis over the expected useful life of the software, which is estimated to be three years. Capitalized internal-use software development costs are classified as “Software” within “Property and Equipment, net” in the accompanying consolidated balance sheets.

During the years ended December 31, 2017, 2016 and 2015, the Company capitalized $3,239, $4,038 and $1,488, respectively, of internal-use software development costs. The Company recorded amortization expense associated with its capitalized internal-use software development costs of $1,867, $690 and $469 for the years ended December 31, 2017, 2016 and 2015, respectively.

Property and Equipment

Property and equipment are recorded at cost and depreciated over their estimated useful lives using the straight-line method. Leasehold improvements are amortized over the shorter of the lease term or the estimated useful life of the related asset. Upon retirement or sale, the cost of assets disposed of, and the related accumulated depreciation, are removed from the accounts, and any resulting gain or loss is included in the determination of net income or loss in the period of retirement.

Property and equipment consists of the following:


	Estimated Useful Life (in Years)		December 31,
			2017		2016
Computer equipment		3		17,157	$	18,750
Software		3 - 6		17,996		14,648
Furniture and fixtures		5		2,396		1,995
Leasehold improvements		Shorter of lease term or the estimated useful life		1,366		1,202

				38,915		36,595
Less accumulated depreciation and amortization				29,772		27,331

			$	9,143	$	9,264

Depreciation and amortization expense, which includes amortization expense associated with capitalized internal-use software development costs, for the years ended December 31, 2017, 2016 and 2015 was $4,523, $4,860 and $5,575, respectively.

Expenditures for maintenance and repairs are charged to expense as incurred, whereas major improvements are capitalized as additions to property and equipment.

On December 31, 2015, the Company entered into an equipment financing agreement with a lender (the “December 2015 Equipment Financing Agreement”) to finance the purchase of $604 in computer equipment. In February 2016, the Company drew down $604 under the December 2015 Equipment Financing Agreement. Refer to Note 8 for a discussion of the equipment financing.

On December 31, 2016, the Company disposed of a cost value of $1.9 million in computer equipment in connection with the closure of certain facilities for the purpose of consolidating its data centers. The Company recorded cost of revenue of $845, of which $695 represented the settlement amount due upon signing a termination agreement relating to the facilities and $150 represented a loss on disposal of assets in connection with the closure of the facilities.

Long-Lived Assets

The Company reviews long-lived assets and certain identifiable intangible assets for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. During this review, the Company re-evaluates the significant assumptions used in determining the original cost and estimated lives of long-lived assets. Although the assumptions may vary from asset to asset, they generally include operating results, changes in the use of the asset, cash flows, and other indicators of value. Management then determines whether the remaining useful life continues to be appropriate, or whether there has been an impairment of long-lived assets based primarily upon whether expected future undiscounted cash flows are sufficient to support the assets’ recovery. If impairment exists, the Company adjusts the carrying value of the asset to fair value, generally determined by a discounted cash flow analysis.

For the years ended December 31, 2017, 2016 and 2015, the Company has not identified any impairment of its long-lived assets.

Business Combinations

The Company records tangible and intangible assets acquired and liabilities assumed in business combinations under the purchase method of accounting. Amounts paid for each acquisition are allocated to the assets acquired and liabilities assumed based on their fair values at the date of acquisition. The Company then allocates the purchase price in excess of net tangible assets acquired to identifiable intangible assets based on detailed valuations that use information and assumptions provided by management. Any excess purchase price over the fair value of the net tangible and intangible assets acquired and liabilities assumed is allocated to goodwill. If the fair value of the assets acquired exceeds the purchase price, the excess is recognized as a gain.

Significant management judgments and assumptions are required in determining the fair value of acquired assets and liabilities, particularly acquired intangible assets. The valuation of purchased intangible assets is based upon estimates of the future performance and cash flows from the acquired business. Each asset is measured at fair value from the perspective of a market participant.

If different assumptions are used, it could materially impact the purchase price allocation and adversely affect our results of operations, financial condition and cash flows.

Intangible Assets and Goodwill

Intangible assets that have finite lives are amortized over their estimated useful lives based on the pattern of consumption of the economic benefit or, if that pattern cannot be readily determined, on a straight-line basis and are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable, as discussed above.

Goodwill is not amortized, but is evaluated for impairment annually, or whenever events or changes in circumstances indicate that the carrying value may not be recoverable.

In assessing the recoverability of goodwill, the Company must make assumptions regarding the estimated future cash flows, and other factors, to determine the fair value of these assets. If these estimates or their related assumptions change in the future, the Company may be required to record impairment charges against these assets in the reporting period in which the impairment is determined. The Company has determined, based on its organizational structure, that it had one reporting unit as of December 31, 2017 and 2016.

For goodwill, the impairment evaluation includes a comparison of the carrying value of the reporting unit to the fair value of the reporting unit. If the reporting unit’s estimated fair value exceeds the reporting unit’s carrying value, no impairment of goodwill exists. If the fair value of the reporting unit does not exceed its carrying value, then further analysis would be required to determine the amount of the impairment, if any.

In accordance with ASU No. 2011-08, Intangibles — Goodwill and Other (Topic 350) Testing Goodwill for Impairment, the Company has the option to assess qualitative factors to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the fair value of a reporting unit is less than its carrying amount to determine whether further impairment testing is necessary. Based on the results of the qualitative review of goodwill performed as of December 31, 2017 and 2016, the Company did not identify any indicators of impairment. As such, the two-phase process described above was not necessary.

Comprehensive Income (Loss)

Comprehensive income (loss) is defined as the change in equity of a business enterprise during a period from transactions, other events, and circumstances from non-owner sources. Accumulated other comprehensive loss is presented separately on the consolidated balance sheets and consists entirely of cumulative foreign translation adjustments as of December 31, 2017 and 2016.

Net Loss per Share

The Company calculates basic and diluted net loss per common share by dividing the net loss by the weighted-average number of common shares outstanding during the period. The Company has excluded (a) all unvested restricted shares that are subject to repurchase and (b) the Company’s other potentially dilutive shares, which include warrants to purchase common stock and outstanding common stock options and unvested restricted stock units, from the weighted-average number of common shares outstanding as their inclusion in the computation for all periods would be anti-dilutive due to net losses incurred.

The following potentially dilutive common shares have been excluded from the computation of dilutive net loss per share as of December 31, 2017, 2016 and 2015, as their effect would have been antidilutive:


	Year Ended December 31,
	2017		2016		2015
Options outstanding		4,127		4,291		4,139
Restricted stock units outstanding		2,050		1,668		1,043
Warrants		—		19		28

Income Taxes

The Company accounts for income taxes in accordance with the asset and liability method. Under this method, deferred tax assets and liabilities are recognized based on temporary differences between the financial reporting and income tax bases of assets and liabilities using statutory rates. In addition, this method requires a valuation allowance against net deferred tax assets if, based upon the available evidence, it is more likely than not that some or all of the deferred tax assets will not be realized.

The Company accounts for uncertain tax positions recognized in the consolidated financial statements by prescribing a more-likely-than-not threshold for financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. Interest and penalties, if applicable, related to uncertain tax positions would be recognized as a component of income tax expense. The Company has no recorded liabilities for uncertain tax positions as of December 31, 2017 or 2016.

Stock-Based Compensation

At December 31, 2017, the Company had four stock-based compensation plans, which are more fully described in Note 6.

For stock options issued under the Company’s stock-based compensation plans, the fair value of each option grant is estimated on the date of grant. For service-based options, the Company recognizes compensation expense on a straight-line basis over the requisite service period of the award. For restricted stock units issued under the Company’s stock-based compensation plans, the fair value of each grant is calculated based on the Company’s stock price on the date of grant.

The fair value of each option grant issued under the Company’s stock-based compensation plans was estimated using the Black-Scholes option-pricing model. The expected volatility of options granted has been determined using a weighted-average of the historical volatility measures of a peer group of companies that issued options with substantially similar terms as well as the historical volatility of the Company’s own common stock. The expected life of options has been determined utilizing the “simplified method”. The simplified method is based on the average of the vesting tranches and the contractual life of each grant. The risk-free interest rate is based on a treasury instrument whose term is consistent with the expected life of the stock options. The Company has not paid, and does not anticipate paying, cash dividends on its common stock; therefore, the expected dividend yield is assumed to be zero.

The weighted-average fair value of options granted during the years ended December 31, 2017, 2016 and 2015, was $3.08, $4.01 and $3.10 per share, respectively. The weighted-average assumptions utilized to determine such values are presented in the following table:


	Year Ended December 31,
	2017			2016			2015
Risk-free interest rate		2.08	%		1.75	%		1.96	%
Expected volatility		42	%		45	%		46	%
Expected life (in years)		6.1			6.2			6.2
Expected dividend yield		—			—			—

For the years ended December 31, 2017, 2016 and 2015, total stock-based compensation expense was $7,243, $6,012 and $6,014, respectively. As of December 31, 2017, there was $18,232 of total unrecognized stock-based compensation expense related to stock based awards that is expected to be recognized over a weighted-average period of 2.06 years.

In July 2017, the Company entered into a separation agreement with its former Chief Executive Officer (“CEO”), which accelerated the vesting schedule of certain existing stock-based awards held by the CEO. The incremental stock-based compensation expense as a result of the modification of these stock-based awards was $186 for the year ended December 31, 2017. Further, the vesting schedule of certain other stock-based awards held by the CEO accelerates upon a change in control of the Company on or prior to December 31, 2017, which would result in an additional $220 of stock-based compensation expense upon such change in control. As there was not a change in control of the Company, the additional stock-based compensation was not recognized.

On January 1, 2017, the Company adopted ASU 2016-09. ASU 2016-09 identifies areas for simplification involving several aspects of accounting for share based payments, including income tax consequences, classification of awards as either equity or liabilities, an option to make a policy election to recognize gross share based compensation expense with actual forfeitures recognized as they occur as well as certain classification changes on the statement of cash flows. In connection with the adoption of this standard, the Company changed its accounting policy to record actual forfeitures as they occur, rather than estimating forfeitures by applying a forfeiture rate. As this policy change was applied prospectively, prior periods have not been adjusted. The Company recorded a cumulative effect adjustment in the three months ended March 31, 2017, which increased accumulated deficit and additional paid-in-capital by $197.

Prior to the adoption of ASU 2016-09 on January 1, 2017, the Company estimated forfeitures at the time of grant and revised those estimates in subsequent periods if actual forfeitures differed from estimates. The Company used historical data to estimate pre-vesting option forfeitures to the extent that actual forfeitures differed from our estimates, and the difference was recorded as a cumulative adjustment in the period the estimates were revised. Stock-based compensation expense recognized in the consolidated financial statements is based on awards that are ultimately expected to vest. For the years ended December 31, 2016 and 2015, the Company applied an estimated forfeiture rate of approximately 17%, and 17%, respectively.

The Company accounts for transactions in which services are received from non-employees in exchange for equity instruments based on the fair value of such services received, or of the equity instruments issued, whichever is more reliably measured. The Company determines the total stock-based compensation expense related to non-employee awards using the Black-Scholes option-pricing model. Additionally, in accordance with ASC 505, Equity-Based Payments to Non-Employees, the Company accounts for awards to non-employees prospectively, such that the fair value of the awards is remeasured at each reporting date until the earlier of (a) the performance commitment date or (b) the date the services required under the arrangement have been completed.

For the years ended December 31, 2017, 2016 and 2015, stock-based compensation expense for stock options granted to non-employees in the accompanying consolidated statements of operations was not material.

See Note 6 for a summary of the stock option and restricted stock activity under the Company’s stock-based compensation plans for the year ended December 31, 2017.

Advertising Costs

Advertising costs are charged to operations as incurred. The Company incurred advertising costs of $2,485, $2,137 and $2,081 for the years ended December 31, 2017, 2016 and 2015, respectively.

Recent Accounting Pronouncements

Revenue Recognition

In May 2014, the Financial Accounting Standards Board (FASB) issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606), which modifies how all entities recognize revenue, and consolidates into one ASC Topic (ASC Topic 606, Revenue from Contracts with Customers) (“ASC 606”), the current guidance found in ASC Topic 605, and various other revenue accounting standards for specialized transactions and industries. ASC 606 outlines a comprehensive five-step revenue recognition model based on the principle that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASC 606 may be applied using either a full retrospective approach, under which all years included in the financial statements will be presented under the revised guidance, or a modified retrospective approach, under which financial statements will be prepared under the revised guidance for the year of adoption, but not for prior years. Under the latter method, entities will recognize a cumulative catch-up adjustment to the opening balance of retained earnings at the effective date for contracts that still require performance by the entity at the date of adoption. In August 2015, the FASB issued ASU 2015-14, Revenue from Contracts with Customers (Topic 606): Deferral of Effective Date, which defers the effective date of ASC 606 by one year. ASC 606 is now effective for annual reporting periods beginning after December 15, 2017, including interim periods within those annual reporting periods.

The Company will adopt ASC 606 on January 1, 2018. The Company has elected to apply the modified retrospective method of adoption. The adoption of ASC 606 is expected to have a material effect on the Company’s consolidated financial statements. In addition to the enhanced footnote disclosures related to customer contracts, the Company anticipates that the most significant impact of the new standard will relate to variable consideration and costs to obtain a contract. In order to complete this assessment, the Company is continuing to update and enhance its internal accounting systems and internal controls over financial reporting.

Variable Consideration

Contracts for premium customers generally provide the customer with a maximum annual level of entitlements and provide the rate at which the customer must pay for actual usage above the annual entitlement allowance. Under ASC 605, if usage exceeds the annual allowance level for a particular customer arrangement, the associated revenue is recognized in the period that the additional usage occurs. Under ASC 606, when the transaction price includes a variable amount, an entity is required to estimate the consideration that is expected to be received for a particular customer arrangement. The Company will evaluate variable consideration for usage based fees at contract inception and re-evaluate quarterly over the course of the contract. Specifically, the Company will estimate the revenue pertaining to a customer’s usage that is expected to exceed the annual entitlement allowance and allocate such revenue to the distinct service within the related contract that gives rise to the variable payment. Estimates of variable consideration relating to customer usage should not include amounts for which it is probable that a significant reversal will occur. Determining the amount of variable consideration to recognize as revenue involves significant judgment on the part of management and it is possible that actual revenue will deviate from estimates over the course of a customer’s committed contract term. The Company has not yet completed its assessment of variable consideration relating to customer usage under ASC 606 and is still evaluating the impact on its results of operations. However, the Company’s preliminary assessment is that there will be a material impact to retained earnings upon adoption.

Costs to Obtain a Contract

Commissions are paid to internal sales representatives as compensation for obtaining contracts. Under ASC 606, the Company will capitalize commissions that are incremental as a result of costs incurred to obtain a customer contract if those costs are not within the scope of another topic within the accounting literature and meet the specified criteria. Assets recognized for costs to obtain a contract will be amortized over the period of performance for the underlying customer contracts. The commission expense on contracts with new customers was previously recorded over the respective contract term. Under ASC 606, the commission expense on contracts with new customers will be recorded over the average life of a customer given the commission amount associated with sales to new customers is not commensurate with the commission amount associated with the contract renewal for those same customers. The commission amount associated with the renewal of a contract in addition to any related incremental sale was previously recorded as expense in the quarter the commission was earned; however, under ASC 606 these commission amounts will be recorded as expense over the term of the renewed contract. These assets will be periodically assessed for impairment. The Company has not yet completed its assessment of costs to obtain a contract under ASC 606 and is still evaluating the impact on its results of operations. However, the Company’s preliminary assessment is that there will be a material impact to retained earnings upon adoption.

Other Recent Accounting Pronouncements

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), Amendments to the FASB Accounting Standards Codification, which replaces the existing guidance for leases. ASU 2016-02 requires the identification of arrangements that should be accounted for as leases by lessees. In general, lease arrangements exceeding a twelve month term must now be recognized as assets and liabilities on the balance sheet of the lessee. Under ASU 2016-02, a right-of-use asset and lease obligation will be recorded for all leases, whether operating or financing, while the income statement will reflect lease expense for operating leases and amortization/interest expense for financing leases. The balance sheet amount recorded for existing leases at the date of adoption of ASU 2016-02 must be calculated using the applicable incremental borrowing rate at the date of adoption. In addition, ASU 2016-02 requires the use of the modified retrospective method, which will require adjustment to all comparative periods presented in the consolidated financial statements. This guidance is effective for annual and interim periods beginning after December 15, 2018 and requires retrospective application. The Company is currently assessing the impact that adopting ASU 2016-02 will have on its consolidated financial statements and related disclosures.

In June 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments, which reduces the diversity in how certain transactions are classified in the statement of cash flows. ASU 2016-15 is effective for public companies for annual and interim periods beginning after December 15, 2017. Early adoption is permitted. The guidance requires application using a retrospective transition method. The adoption of ASU 2016-15 is not expected to have a material effect on the Company’s consolidated financial statements or disclosures.

In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash, which requires an entity to reconcile and explain the period-over-period change in total cash, cash equivalents and restricted cash within its statement of cash flows. ASU 2016-18 is effective for annual and interim periods beginning after December 15, 2017. Early adoption is permitted. A reporting entity must apply the amendments in ASU 2016-18 using a full retrospective approach. The adoption of ASU 2016-18 is not expected to have a material effect on the Company’s consolidated financial statements or disclosures.

In January 2017, the FASB issued ASU 2017-04, Intangibles – Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. The updated guidance eliminates Step 2 of the impairment test, which requires entities to calculate the implied fair value of goodwill to measure a goodwill impairment charge. Instead, entities will record an impairment charge based on the excess of a reporting unit’s carrying amount over its fair value, determined in Step 1. ASU 2017-04 is effective for annual and interim periods beginning after December 15, 2019. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. The Company does not plan to early adopt ASU 2017-04, and the Company is currently evaluating the impact of this guidance on the Company’s consolidated financial statements and related disclosures.

In May 2017, the FASB issued ASU 2017-09, Compensation – Stock Compensation (Topic 718): Scope of Modification Accounting, which clarifies when changes to the terms or conditions of a share-based payment award must be accounted for as modifications. ASU 2017-09 will reduce diversity in practice and result in fewer changes to the terms of an award being accounted for as modifications. Under ASU 2017-09, an entity will not apply modification accounting to a share-based payment award if the award’s fair value, vesting conditions and classification as an equity or liability instrument are the same immediately before and after the change. ASU 2017-09 will be applied prospectively to awards modified on or after the adoption date. The guidance is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2017. The Company has adopted this guidance effective January 1, 2018 and does not expect this new guidance to have a material impact on the Company’s consolidated financial statements.

On December 22, 2017, the Tax Cuts and Jobs Act (the “Act”) was enacted in the United States. The Act reduces the U.S. federal corporate tax rate from 34% to 21%, requires companies to pay a one-time transition tax on earnings of certain foreign subsidiaries that were previously tax deferred and creates new taxes on certain foreign sourced earnings. In December 2017, the Securities and Exchange Commission (“SEC”) issued guidance under Staff Accounting Bulletin No. 118, Income Tax Accounting Implications of the Tax Cuts and Jobs Act (“SAB 118”) directing taxpayers to consider the impact of the U.S. legislation as “provisional” when it does not have the necessary information available, prepared or analyzed (including computations) in reasonable detail to complete its accounting for the change in tax law. As of December 31, 2017, the Company had not yet completed its accounting for all of the tax effects of the enactment of the Act; however, the Company has made a reasonable estimate of the effects on our existing deferred tax balances and one-time transition tax. Refer to Note 7, Income Taxes, for additional information regarding this new tax legislation.

In addition to the reduction in the federal corporate tax rate and the one-time transition tax, which the Company has accounted for with provisional estimates at December 31, 2017, the Company continues to analyze the provisions of tax reform that become effective for the Company in 2018 including the provisions related to Global Intangible Low Taxed Income, Foreign Derived Intangible Income, Base Erosion Anti-Abuse Tax, as well as other provisions which would limit the deductibility of future expenses.

Intangible Assets and Goodwill

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets and Goodwill

3. Intangible Assets and Goodwill

Finite-lived intangible assets consist of the following as of December 31, 2017:


Description	Weighted Average Estimated Useful Life (in years)		Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Developed technology		7	$	14,223	$	9,431	$	4,792
Customer relationships		11		6,257		2,813		3,444
Non-compete agreements		3		1,912		1,912		—
Tradename		3		368		368		—

Total			$	22,760	$	14,524	$	8,236

Finite-lived intangible assets consist of the following as of December 31, 2016:


Description	Weighted Average Estimated Useful Life (in years)		Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Developed technology		7	$	14,223	$	7,400	$	6,823
Customer relationships		11		6,257		2,147		4,110
Non-compete agreements		3		1,912		1,875		37
Tradename		3		368		368		—

Total			$	22,760	$	11,790	$	10,970

Amortization expense related to intangible assets for the years ended December 31, 2017, 2016 and 2015 was $2,734, $3,116 and $3,112, respectively.

The estimated remaining amortization expense for each of the five succeeding years and thereafter is as follows:


Year Ending December 31,	Amount
2018	$	2,317
2019		1,603
2020		1,585
2021		1,327
2022		370
2023 and thereafter		1,034

Total	$	8,236

The carrying amount of goodwill was $50,776 as of December 31, 2017 and 2016.

- Definition

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

+ References + Details

Fair Value Measurements

12 Months Ended

Dec. 31, 2017

Fair Value Disclosures [Abstract]

Fair Value Measurements

4. Fair Value Measurements

ASC 820, Fair Value Measurements and Disclosures, establishes a three-level valuation hierarchy for instruments measured at fair value that distinguishes between assumptions based on market data (observable inputs) and the Company’s own assumptions (unobservable inputs). Observable inputs are inputs that market participants would use in pricing the asset or liability based on market data obtained from sources independent of the Company. Unobservable inputs are inputs that reflect the Company’s assumptions about the inputs that market participants would use in pricing the asset or liability, and are developed based on the best information available in the circumstances.

ASC 820 identifies fair value as an exit price, representing the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants based on the highest and best use of the asset or liability. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability. The Company uses valuation techniques to measure fair value that maximize the use of observable inputs and minimize the use of unobservable inputs. These inputs are prioritized as follows:

•

Level 1: Observable inputs, such as quoted prices for identical assets or liabilities in active markets;

•

Level 2: Inputs, other than the quoted prices in active markets, that are observable either directly or indirectly, such as quoted prices for similar assets or liabilities, or market-corroborated inputs; and

•

Level 3: Unobservable inputs for which there is little or no market data which require the reporting entity to develop its own assumptions about how market participants would price the assets or liabilities.

The valuation techniques that may be used to measure fair value are as follows:

A. Market approach — Uses prices and other relevant information generated by market transactions involving identical or comparable assets or liabilities.

B. Income approach — Uses valuation techniques to convert future amounts to a single present amount based on current market expectations about those future amounts, including present value techniques, option-pricing models, and excess earnings method.

C. Cost approach — Based on the amount that currently would be required to replace the service capacity of an asset (replacement cost).

The following tables set forth the Company’s financial instruments carried at fair value using the lowest level of input as of December 31, 2017 and 2016:


	December 31, 2017
	Quoted Prices in Active Markets for Identical Items (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Assets:
Money market funds	$	8,160	$	—	$	—	$	8,160

Total assets	$	8,160	$	—	$	—	$	8,160


	December 31, 2016
	Quoted Prices in Active Markets for Identical Items (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Assets:
Money market funds	$	12,871	$	—	$	—	$	12,871

Total assets	$	12,871	$	—	$	—	$	12,871

Realized gains and losses from sales of the Company’s investments are included in “Other income (expense), net”.

The Company measures eligible assets and liabilities at fair value, with changes in value recognized in earnings. Fair value treatment may be elected either upon initial recognition of an eligible asset or liability or, for an existing asset or liability, if an event triggers a new basis of accounting. The Company did not elect to remeasure any of its existing financial assets or liabilities, and did not elect the fair value option for any financial assets and liabilities transacted in the years ended December 31, 2017 or 2016.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Commitments and Contingencies

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

5. Commitments and Contingencies

Operating Lease Commitments

The Company leases its facilities under non-cancelable operating leases. These operating leases expire at various dates through January 2024. Future minimum rental commitments under operating leases at December 31, 2017 are as follows:


Year Ending December 31,	Operating Lease Commitments
2018	$	8,384
2019		6,990
2020		5,165
2021		4,952
2022		2,013
2023 and thereafter		2,094

	$	29,598

Certain amounts included in the table above relating to co-location leases for the Company’s servers include usage based charges in addition to base rent.

The Company’s primary office lease has the option to renew the lease for two successive periods of five years each. In connection with the office lease, the Company entered into a letter of credit in the amount of $2,404.

Certain of the Company’s operating leases include escalating payment amounts and lease incentives. The Company is recognizing the related rent expense on a straight-line basis over the term of the lease. The lease incentives are considered an inseparable part of the lease agreement, and are recognized as a reduction of rent expense on a straight-line basis over the term of the lease. As of December 31, 2017 and 2016, the Company had deferred rent and rent incentives of $1,464 and $1,579, respectively, of which $1,102 and $1,320, respectively, is classified as a long-term liability in the accompanying consolidated balance sheets. Rent expense for the years ended December 31, 2017, 2016 and 2015 was $6,608, $6,334 and $6,831, respectively. Income from sublease rental activity amounted to $285, $219 and $185, respectively, for the years ended December 31, 2017, 2016 and 2015.

In addition to the operating obligations noted in the table above, during the year ended December 31, 2017, the Company recorded cost of revenue of $845, $695 of which represented the settlement amount due upon signing a termination agreement relating to the facilities and $150 represented a loss on disposal of assets in connection with the closure of the facilities for the purpose of consolidating data centers.

Capital Lease Commitments

The Company leases certain computer equipment and support under non-cancelable capital leases. The lease arrangements expire at various dates through September 2018. Future minimum rental commitments under capital leases at December 31, 2017 are as follows:


Year Ending December 31,	Capital Lease Commitments
2018	$	231
Less – interest on capital leases		3

	$	228

At December 31, 2017, total assets under capital leases were $1.2 million and related accumulated amortization was $940,000.

In addition to the operating lease and capital lease commitments discussed above, as of December 31, 2017, the Company had non-cancelable commitments of $15,833, $7,823 and $173 payable in 2018, 2019 and 2020, respectively, primarily for content delivery network services, hosting and other support services.

Legal Matters

The Company, from time to time, is party to litigation arising in the ordinary course of business. Management does not believe that the outcome of these claims will have a material adverse effect on the consolidated financial position, results of operations or cash flows of the Company based on the status of proceedings at this time.

On May 22, 2017, a lawsuit was filed against Brightcove and two individuals by Ooyala, Inc. (“Ooyala”) and Ooyala Mexico S. de R.L. de C.V. (“Ooyala Mexico”). The lawsuit, which was filed in the United States District Court for the District of Massachusetts, concerns allegations that the two individuals, who are former employees of Ooyala Mexico, misappropriated customer information and other trade secrets and used that information in working for Brightcove. The complaint was amended on June 1, 2017 to remove claims against the two former employees of Ooyala Mexico. The remaining claims against Brightcove are for violation of the Defend Trade Secrets Act of 2016 (18 U.S.C. §1836), violation of the Massachusetts trade secret statute (M.G.L. c. 93, §42), violation of Massachusetts Chapter 93A (M.G.L. c. 93A, §11), and tortious interference with advantageous business relationships. Ooyala and Ooyala Mexico also filed a motion for preliminary injunction (amended at the same time the complaint was amended), seeking to enjoin Brightcove from using any of the allegedly misappropriated information or communicating with customers whose information was allegedly taken, and seeking the return of any information that was taken. On June 16, 2017, Brightcove filed an opposition to the motion for preliminary injunction, and also moved to dismiss the lawsuit. Brightcove’s motion to dismiss was denied on September 6, 2017. The court has not ruled on Ooyala’s motion for preliminary injunction. The Company expects the court to issue a schedule order in the near term. The Company cannot yet determine whether it is probable that a loss will be incurred in connection with this complaint, nor can the Company reasonably estimate the potential loss, if any.

On October 26, 2017, Realtime Adaptive Streaming LLC filed a complaint against Brightcove and Brightcove’s subsidiary Brightcove Holdings, Inc. (collectively, in this paragraph, “Brightcove”) in the United States District Court for the District of Delaware. The complaint alleges that Brightcove infringed five patents related to file compression technology. The complaint seeks monetary damages and injunctive relief. On December 1, 2017, Realtime filed an amended complaint, adding two additional patents to its claims. Brightcove filed a motion to dismiss on January 26, 2018. Realtime filed an opposition to the motion to dismiss on February 9, 2018 and Brightcove filed a reply on February 16, 2018. A ruling on the motion to dismiss has not yet been issued by the court. We cannot yet determine whether it is probable that a loss will be incurred in connection with this complaint, nor can the Company reasonably estimate the potential loss, if any.

Guarantees and Indemnification Obligations

The Company typically enters into indemnification agreements in the ordinary course of business. Pursuant to these agreements, the Company indemnifies and agrees to reimburse the indemnified party for losses and costs incurred by the indemnified party, generally the Company’s customers, in connection with patent, copyright, trade secret, or other intellectual property or personal right infringement claim by third parties with respect to the Company’s technology. The term of these indemnification agreements is generally perpetual after execution of the agreement. Based on when customers first subscribe for the Company’s service, the maximum potential amount of future payments the Company could be required to make under certain of these indemnification agreements is unlimited, however, more recently the Company has typically limited the maximum potential value of such potential future payments in relation to the value of the contract. Based on historical experience and information known as of December 31, 2017, the Company has not incurred any costs for the above guarantees and indemnities. The Company has received requests for indemnification from customers in connection with patent infringement suits brought against the customer by a third party. To date, the Company has not agreed that the requested indemnification is required by the Company’s contract with any such customer.

In certain circumstances, the Company warrants that its products and services will perform in all material respects in accordance with its standard published specification documentation in effect at the time of delivery of the licensed products and services to the customer for the warranty period of the product or service. To date, the Company has not incurred significant expense under its warranties and, as a result, the Company believes the estimated fair value of these agreements is immaterial.

Stockholders' Equity

12 Months Ended

Dec. 31, 2017

Equity [Abstract]

Stockholders' Equity

6. Stockholders’ Equity

Common Stock

Common stockholders are entitled to one vote per share. Holders of common stock are entitled to receive dividends, when and if declared by the Board.

Treasury Stock

The Company has recorded 135,000 shares as treasury stock as of December 31, 2017 and 2016.

Equity Incentive Plans

At December 31, 2017, the Company had four stock-based compensation plans, the Amended and Restated 2004 Stock Option and Incentive Plan (the 2004 Plan), the 2012 Stock Incentive Plan (the 2012 Plan), the Brightcove Inc. 2012 RSU Inducement Plan (the RSU Plan), and the Brightcove Inc. 2014 Stock Option Inducement Plan (the 2014 Stock Inducement Plan).

The 2004 Plan provided for the issuance of incentive and non-qualified stock options, restricted stock, and other equity awards to the Company’s employees, officers, directors, consultants and advisors, up to an aggregate of 7,397,843 shares of the Company’s common stock. The Company also established a UK Sub-Plan of the 2004 Plan under which the Company was permitted to make grants of options to employees subject to tax in the United Kingdom. In conjunction with the effectiveness of the 2012 Plan, the Board voted that no further stock options or other equity-based awards may be granted under the 2004 Plan.

In 2012, the Board and stockholders adopted the 2012 Plan, which became effective on February 16, 2012. The 2012 Plan provides for the issuance of incentive and non-qualified stock options, restricted stock and other stock-based awards to the Company’s officers, employees, non-employee directors and certain other key persons of the Company as are selected by the Board or the compensation committee thereof. In connection with the approval of the 2012 Plan, the Company reserved 1,700,000 shares of common stock for issuance under the 2012 Plan, and 124,703 shares were transferred from the 2004 Plan. The number of shares reserved and available for issuance under the 2012 Plan automatically increases each January 1, beginning in 2013, by 4% of the outstanding number of shares of the Company’s common stock on the immediately preceding December 31 or such lesser number of shares as determined by the Company’s compensation committee subject to an overall overhang limit of 30%. This number is subject to adjustment in the event of a stock split, stock dividend or other change in the Company’s capitalization.

In 2012, the Company adopted the RSU Plan and made awards of restricted stock units pursuant to the RSU Plan to 15 new employees in connection with the acquisition of Zencoder. The awards of restricted stock units cover an aggregate of 77,100 shares of the Company’s common stock and were made as a material inducement to the employees entering into employment with the Company in connection with the acquisition of Zencoder. The restricted stock units were settled in shares of the Company’s common stock upon vesting.

In 2014, the Company adopted the 2014 Stock Inducement Plan and made awards of options pursuant to the 2014 Stock Inducement Plan to 61 new employees in connection with the asset purchase agreement. The awards of options cover an aggregate of 578,350 shares of the Company’s common stock in the form of options to purchase shares of the Company’s common stock as an inducement to the employees entering into employment with the Company in connection with the asset purchase agreement.

At December 31, 2017, 1,429,022 shares were available for issuance under all stock-based compensation plans.

The following is a summary of the stock option activity for all stock option plans during the year ended December 31, 2017:


	Number of Shares			Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term (In Years)		Aggregate Intrinsic Value ⁽¹⁾
Outstanding at December 31, 2016		4,150,584		$	7.17
Granted		483,727			7.03
Exercised		(229,127	)		2.27			$	1,243
Cancelled		(480,871	)		8.05

Outstanding at December 31, 2017		3,924,313		$	7.33		6.30	$	3,783

Exercisable at December 31, 2017		2,430,839		$	7.23		5.37	$	3,052

(1)	The aggregate intrinsic value was calculated based on the positive difference between the estimated fair value of the Company’s common stock on December 31, 2017 of $7.10 per share, or the date of exercise, as appropriate, and the exercise price of the underlying options.

The aggregate intrinsic value for options exercised during the years ended December 31, 2016 and 2015 was $5,159 and $281, respectively.

The Company has entered into restricted stock unit (RSU) agreements with certain of its employees pursuant to the 2012 Plan and the RSU Plan. Vesting occurs periodically at specified time intervals, ranging from three months to four years, and in specified percentages. Upon vesting, the holder will receive one share of the Company’s common stock for each unit vested.

The following table summarizes the RSU activity during the year ended December 31, 2017:


	Shares			Weighted Average Grant Date Fair Value
Unvested by December 31, 2016		1,902,577		$	7.84
Granted		1,189,973			6.95
Vested and issued		(561,133	)		7.47
Cancelled		(312,713	)		7.80

Unvested by December 31, 2017		2,218,704		$	7.44

Warrants

In September 2006, the Company issued fully vested warrants to purchase an aggregate of 46,713 shares of Series B Preferred Stock, at a purchase price of $3.21 per share, to two lenders in connection with a line of credit agreement. The warrants were exercisable at any time up until the expiration date of August 31, 2016. The fair value of the warrants was recorded as a discount on the related debt, and was amortized to interest expense over the life of the debt. The debt was fully repaid in March 2007. The warrant liability was reported at fair value until completion of the Company’s IPO in February 2012, whereupon the warrants automatically converted into warrants to purchase shares of the Company’s common stock. At the time of conversion of the warrants in connection with the Company’s IPO, the fair value of the warrants was $395, which was reclassified as a component of additional paid-in capital.

During 2012, 18,685 shares exercisable under the warrants were exercised pursuant to a net exercise provision, which resulted in the issuance of 15,781 common shares. In August 2016, the remaining 28,028 shares exercisable under the warrants were exercised pursuant to a net exercise provision, which resulted in the issuance of 20,528 common shares.

Common Stock Reserved for Future Issuance

At December 31, 2017, the Company has reserved the following shares of common stock for future issuance:


	December 31, 2017
Common stock options outstanding		3,924,313
Restricted stock unit awards outstanding		2,218,704
Shares available for issuance under all stock-based compensation plans		1,429,022

Total shares of authorized common stock reserved for future issuance		7,572,039

Income Taxes

12 Months Ended

Dec. 31, 2017

Income Tax Disclosure [Abstract]

Income Taxes

7. Income Taxes

Loss before the provision for income taxes consists of the following:


	Year Ended December 31,
	2017			2016			2015
Domestic	$	(20,528	)	$	(10,756	)	$	(8,028	)
Foreign		1,379			1,180			839

Total	$	(19,149	)	$	(9,576	)	$	(7,189	)

The provision for income taxes in the accompanying consolidated financial statements consists of the following:


	Year Ended December 31,
	2017		2016			2015
Current provision:
Federal	$	—	$	—		$	—
State		21		33			29
Foreign		311		424			389

Total current		332		457			418

Deferred (benefit):
Federal		—		—			—
State		—		—			—
Foreign		38		(47	)		(27	)

Total deferred		38		(47	)		(27	)

Total provision	$	370	$	410		$	391

A reconciliation of the U.S. federal statutory rate to the Company’s effective tax rate is as follows:


	Year Ended December 31,
	2017			2016			2015
Tax at statutory rates		(34.0	)%		(34.0	)%		(34.0	)%
State income taxes		(4.1	)		(6.1	)		3.4
Change in tax rate		103.9			0.1			3.0
Permanent differences		7.1			11.7			34.7
Foreign rate differential		(0.7	)		(1.1	)		(1.2	)
Research and development credits		(3.7	)		(6.7	)		(9.6	)
Change in valuation allowance		(66.3	)		40.8			7.7
Other, net		(0.3	)		(0.4	)		1.4

Effective tax rate		1.9	%		4.3	%		5.4	%

The approximate income tax effect of each type of temporary difference and carryforward as of December 31, 2017 and 2016 is as follows:


	As of December 31,
	2017			2016
Deferred tax assets:
Net operating loss carry-forwards	$	37,964		$	45,850
Tax credit carry-forwards		9,173			7,654
Stock-based compensation		1,856			2,236
Fixed Assets		267			154
Account receivable reserves		189			219
Accrued compensation		851			2,232
Capitalized start-up costs		138			279
Other temporary differences		371			761

Total deferred tax assets		50,809			59,385
Deferred tax liabilities:
Intangible assets		(3,611	)		(5,962	)

Total deferred tax liabilities		(3,611	)		(5,962	)

Valuation allowance		(47,111	)		(53,302	)

Net deferred tax assets	$	87		$	121

The Company is required to compute income tax expense in each jurisdiction in which it operates. This process requires the Company to project its current tax liability and estimate its deferred tax assets and liabilities, including net operating loss (NOL) and tax credit carry-forwards. In assessing the ability to realize the net deferred tax assets, management considers whether it is more likely than not that some portion or all of the net deferred tax assets will not be realized.

The Company has provided a valuation allowance against its remaining U.S. net deferred tax assets as of December 31, 2017 and 2016, as based upon the level of historical U.S. losses and future projections over the period in which the net deferred tax assets are deductible, at this time, management believes it is more likely than not that the Company will not realize the benefits of these deductible differences. The decrease in the valuation allowance from 2016 to 2017 of $6.2 million principally relates to the reduction in federal deferred tax rate offset by the current year taxable loss.

Based upon the level of historical income in Japan and future projections, the Company believes it is probable it will realize the benefits of its future deductible differences. As such, the Company has not recorded a valuation allowance against its net deferred tax assets in Japan as of December 31, 2017 and 2016.

As of December 31, 2017, the Company had federal and state net operating losses of approximately $161.9 million and $66.7 million, respectively, which are available to offset future taxable income, if any, through 2037. The Company also had federal and state research and development tax credits of $6.1 million and $3.9 million, respectively, which expire in various amounts through 2037. The net operating loss and tax credit amounts are subject to annual limitations under Section 382 change of ownership rules under the U.S. Internal Revenue Code of 1986, as amended. Through June 30, 2014, the Company completed an assessment to determine whether there may have been a Section 382 ownership change and determined that it is more-likely-than-not that the Company’s net operating and tax credit amounts as disclosed are not subject to any material Section 382 limitations.

On January 1, 2009, the Company adopted the provision for uncertain tax positions under ASC 740, Income Taxes. The adoption did not have an impact on the Company’s retained earnings balance. At December 31, 2017 and 2016, the Company had no recorded liabilities for uncertain tax positions.

At December 31, 2017 and 2016, the Company had no accrued interest or penalties related to uncertain tax positions.

The Company files income tax returns in the U.S. federal tax jurisdiction, various state and various foreign jurisdictions. The Company is currently open to examination under the statute of limitations by the Internal Revenue Service and state jurisdictions for the tax years ended 2014 through 2017. Since the Company is in a U.S. loss carryforward position, carryforward tax attributes generated in prior years may still be adjusted upon future examination if they have or will be used in a future period. Additionally, certain non-U.S. jurisdictions are no longer subject for income tax examinations by authorities for tax years before 2012.

As of December 31, 2017, the Company had not yet completed its accounting for all of the tax effects of the enactment of the Act; however, the Company has made a reasonable estimate of the effects on its existing deferred tax balances and the one-time transition tax. The Company will continue to refine its calculations as additional analysis is completed. The Company expects that any additional changes will be offset by an increase or decrease in the Company’s valuation allowance as any transition tax will result in use of the net operating loss deferred tax asset, which is fully offset by a valuation allowance along with all other net deferred tax assets.

No additional U.S. income taxes or foreign withholding taxes have been provided for any additional outside basis differences inherent in the Company’s foreign entities as these amounts continue to be indefinitely reinvested in foreign operations based on management’s current intentions. Determining the amount of unrecognized deferred tax liability related to any remaining undistributed foreign earnings not subject to the transition tax and additional outside basis difference in these entities (i.e., basis difference in excess of that subject to the one-time transition tax) is not practicable. The Company is still in the process of analyzing the impact of the Act on its indefinite reinvestment assertion.

Debt	12 Months Ended
Debt	Dec. 31, 2017
Debt Disclosure [Abstract]
Debt	8. Debt On November 19, 2015, the Company entered into an amended and restated loan and security agreement with a lender (the “Loan Agreement”) providing for up to a $20.0 million asset based line of credit (the “Line of Credit”). Under the Line of Credit, the Company can borrow up to $20.0 million. Borrowings under the Line of Credit are secured by substantially all of the Company’s assets, excluding intellectual property. Outstanding amounts under the Line of Credit accrue interest at a rate equal to the prime rate or the LIBOR rate plus 2.5%. Under the Loan Agreement, the Company must comply with certain financial covenants, including maintaining a minimum asset coverage ratio. If the outstanding principal during any month is at least $15.0 million, the Company must also maintain a minimum net income threshold based on non-GAAP operating measures. Failure to comply with these covenants, or the occurrence of an event of default, could permit the lender under the Line of Credit to declare all amounts borrowed under the Line of Credit, together with accrued interest and fees, to be immediately due and payable. The Company was in compliance with all covenants under the Line of Credit as of December 31, 2017. As the Company has not drawn on the Line of Credit, there are no amounts outstanding as of December 31, 2017. On December 31, 2015, the Company entered into an equipment financing agreement with a lender (the “December 2015 Equipment Financing Agreement”) to finance the purchase of $604 in computer equipment. In February 2016, the Company drew down $604 under the December 2015 Equipment Financing Agreement, and the liability was recorded at fair value using a market interest rate. The Company repaid its obligation over a two year period through January 2018, and the amount outstanding was $26 as of December 31, 2017.

Accrued Expenses

12 Months Ended

Dec. 31, 2017

Payables and Accruals [Abstract]

Accrued Expenses

9. Accrued Expenses

Accrued expenses consist of the following:


	December 31,
	2017		2016
Accrued payroll and related benefits	$	4,436	$	7,089
Accrued sales and other taxes		1,363		2,275
Accrued professional fees and outside contractors		2,021		1,082
Accrued content delivery		2,390		2,013
Accrued other liabilities		3,411		3,246

Total	$	13,621	$	15,705

Segment Information

12 Months Ended

Dec. 31, 2017

Segment Reporting [Abstract]

Segment Information

10. Segment Information

Disclosure requirements about segments of an enterprise and related information establishes standards for reporting information regarding operating segments in annual financial statements and requires selected information of those segments to be presented in interim financial reports issued to stockholders. Operating segments are identified as components of an enterprise about which separate discrete financial information is available for evaluation by the chief operating decision-maker, or decision-making group, in making decisions on how to allocate resources and assess performance. The Company’s chief decision maker is its chief executive officer. The Company and the chief decision maker view the Company’s operations and manage its business as one operating segment.

Geographic Data

Total revenue to unaffiliated customers by geographic area, based on the location of the customer, was as follows:


	Year Ended December 31,
	2017		2016		2015
Revenue:
North America	$	91,358	$	92,912	$	86,106
Europe		24,425		25,196		25,380
Japan		16,881		15,230		9,061
Asia Pacific		22,539		15,617		12,380
Other		710		1,311		1,779

Total revenue	$	155,913	$	150,266	$	134,706

North America is comprised of revenue from the United States, Canada and Mexico. Revenue from customers located in the United States was $85,459, $87,302 and $80,455 during the years ended December 31, 2017, 2016 and 2015, respectively. Revenue from customers located in Japan was $16,881, $15,230 and $9,061 during the years ended December 31, 2017, 2016 and 2015, respectively. Other than the United States and Japan, no other country contributed more than 10% of the Company’s total revenue during the years ended December 31, 2017 and 2016.

As of December 31, 2017 and December 31, 2016, property and equipment at locations outside the U.S. was not material.

Quarterly Financial Data

12 Months Ended

Dec. 31, 2017

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Data

12. Quarterly Financial Data (unaudited)

The following table presents certain unaudited quarterly financial information for the eight quarters in the period ended December 31, 2017. This information has been prepared on the same basis as the audited financial statements and includes all adjustments (consisting only of normal recurring adjustments) necessary to present fairly the unaudited quarterly results of operations set forth herein.


	For the three months ended:
	Dec. 31, 2017			Sep. 30, 2017			Jun. 30, 2017			Mar. 31, 2017			Dec. 31, 2016			Sep. 30, 2016			Jun. 30, 2016			Mar. 31, 2016
Revenue	$	40,101		$	39,487		$	38,753		$	37,572		$	38,625		$	38,389		$	36,960		$	36,292
Gross profit		23,783			22,983			22,175			22,354			23,272			24,612			23,507			23,028
Loss from operations		(1,331	)		(5,349	)		(7,884	)		(5,132	)		(3,684	)		(1,552	)		(2,211	)		(1,531	)
Net loss		(1,372	)		(5,396	)		(7,678	)		(5,073	)		(4,363	)		(1,618	)		(2,398	)		(1,607	)

Basic net loss per share		(0.04	)		(0.16	)		(0.22	)		(0.15	)		(0.13	)		(0.05	)		(0.07	)		(0.05	)
Diluted net loss per share		(0.04	)		(0.16	)		(0.22	)		(0.15	)		(0.13	)		(0.05	)		(0.07	)		(0.05	)

Business Description (Policies)

12 Months Ended

Dec. 31, 2017

Accounting Policies [Abstract]

Business Description

Business Description

Brightcove Inc. (the Company) is a leading global provider of cloud services for video which enable its customers to publish and distribute video to Internet-connected devices quickly, easily and in a cost-effective and high-quality manner.

The Company is headquartered in Boston, Massachusetts and was incorporated in the state of Delaware on August 24, 2004. At December 31, 2017, the Company had nine wholly-owned subsidiaries: Brightcove UK Ltd, Brightcove Singapore Pte. Ltd., Brightcove Korea, Brightcove Australia Pty Ltd, Brightcove Holdings, Inc., Brightcove Kabushiki Kaisha (Brightcove KK), Zencoder Inc. (Zencoder), Brightcove FZ-LLC, and Cacti Acquisition LLC.

Basis of Presentation

Basis of Presentation

Use of Estimates and Uncertainties

Use of Estimates and Uncertainties

Principles of Consolidation

Principles of Consolidation

Subsequent Events Considerations

Subsequent Events Considerations

Foreign Currency Translation

Foreign Currency Translation

Cash and Cash Equivalents

Cash and Cash Equivalents

Cash and cash equivalents as of December 31, 2017 and 2016 consist of the following:


	December 31, 2017
Description	Contracted Maturity		Amortized Cost		Fair Market Value		Balance Per Balance Sheet
Cash		Demand	$	17,972	$	17,972	$	17,972
Money market funds		Demand		8,160		8,160		8,160

Total cash and cash equivalents			$	26,132	$	26,132	$	26,132


	December 31, 2016
Description	Contracted Maturity		Amortized Cost		Fair Market Value		Balance Per Balance Sheet
Cash		Demand	$	23,942	$	23,942	$	23,942
Money market funds		Demand		12,871		12,871		12,871

Total cash and cash equivalents			$	36,813	$	36,813	$	36,813

Disclosure of Fair Value of Financial Instruments

Disclosure of Fair Value of Financial Instruments

Revenue Recognition

Revenue Recognition

Revenue recognition commences upon the later of when the application is placed in a production environment, or when all revenue recognition criteria have been met.

Professional services and other revenue sold on a stand-alone basis are recognized as the services are performed, subject to any refund or other obligation.

Revenue is presented net of any taxes collected from customers.

Multiple-Element Arrangements

The Company periodically enters into multiple-element service arrangements that include platform subscription fees, support fees, and, in certain cases, other professional services.

Cost of Revenue

Cost of Revenue

Allowance for Doubtful Accounts

Allowance for Doubtful Accounts

Below is a summary of the changes in the Company’s allowance for doubtful accounts for the years ended December 31, 2017, 2016 and 2015:


	Balance at Beginning of Period		Provision		Write-offs			Balance at End of Period
Year ended December 31, 2017	$	154	$	203	$	(211	)	$	146
Year ended December 31, 2016		332		230		(408	)		154
Year ended December 31, 2015		181		408		(257	)		332

Off-Balance Sheet Risk and Concentration of Credit Risk

Off-Balance Sheet Risk and Concentration of Credit Risk

For the years ended December 31, 2017, 2016 and 2015, no individual customer accounted for more than 10% of total revenue.

As of December 31, 2017 and 2016, no individual customer accounted for more than 10% of net accounts receivable.

Concentration of Other Risks

Concentration of Other Risks

Software Development Costs

Software Development Costs

Property and Equipment

Property and Equipment

Property and equipment consists of the following:


	Estimated Useful Life (in Years)		December 31,
			2017		2016
Computer equipment		3		17,157	$	18,750
Software		3 - 6		17,996		14,648
Furniture and fixtures		5		2,396		1,995
Leasehold improvements		Shorter of lease term or the estimated useful life		1,366		1,202

				38,915		36,595
Less accumulated depreciation and amortization				29,772		27,331

			$	9,143	$	9,264

Expenditures for maintenance and repairs are charged to expense as incurred, whereas major improvements are capitalized as additions to property and equipment.

Long-Lived Assets

Long-Lived Assets

For the years ended December 31, 2017, 2016 and 2015, the Company has not identified any impairment of its long-lived assets.

Business Combinations

Business Combinations

If different assumptions are used, it could materially impact the purchase price allocation and adversely affect our results of operations, financial condition and cash flows.

Intangible Assets and Goodwill

Intangible Assets and Goodwill

Goodwill is not amortized, but is evaluated for impairment annually, or whenever events or changes in circumstances indicate that the carrying value may not be recoverable.

Comprehensive Income (Loss)

Comprehensive Income (Loss)

Net Loss per Share

Net Loss per Share


	Year Ended December 31,
	2017		2016		2015
Options outstanding		4,127		4,291		4,139
Restricted stock units outstanding		2,050		1,668		1,043
Warrants		—		19		28

Income Taxes

Income Taxes

Stock-Based Compensation

Stock-Based Compensation

At December 31, 2017, the Company had four stock-based compensation plans, which are more fully described in Note 6.


	Year Ended December 31,
	2017			2016			2015
Risk-free interest rate		2.08	%		1.75	%		1.96	%
Expected volatility		42	%		45	%		46	%
Expected life (in years)		6.1			6.2			6.2
Expected dividend yield		—			—			—

See Note 6 for a summary of the stock option and restricted stock activity under the Company’s stock-based compensation plans for the year ended December 31, 2017.

Advertising Costs

Advertising Costs

Advertising costs are charged to operations as incurred. The Company incurred advertising costs of $2,485, $2,137 and $2,081 for the years ended December 31, 2017, 2016 and 2015, respectively.

Recent Accounting Pronouncements

Recent Accounting Pronouncements

Revenue Recognition

Variable Consideration

Costs to Obtain a Contract

Other Recent Accounting Pronouncements

Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2017

Accounting Policies [Abstract]

Schedule of Cash and Cash Equivalents

Cash and cash equivalents as of December 31, 2017 and 2016 consist of the following:


	December 31, 2017
Description	Contracted Maturity		Amortized Cost		Fair Market Value		Balance Per Balance Sheet
Cash		Demand	$	17,972	$	17,972	$	17,972
Money market funds		Demand		8,160		8,160		8,160

Total cash and cash equivalents			$	26,132	$	26,132	$	26,132


	December 31, 2016
Description	Contracted Maturity		Amortized Cost		Fair Market Value		Balance Per Balance Sheet
Cash		Demand	$	23,942	$	23,942	$	23,942
Money market funds		Demand		12,871		12,871		12,871

Total cash and cash equivalents			$	36,813	$	36,813	$	36,813

Summary of Changes in Company's Allowance for Doubtful Accounts

Below is a summary of the changes in the Company’s allowance for doubtful accounts for the years ended December 31, 2017, 2016 and 2015:


	Balance at Beginning of Period		Provision		Write-offs			Balance at End of Period
Year ended December 31, 2017	$	154	$	203	$	(211	)	$	146
Year ended December 31, 2016		332		230		(408	)		154
Year ended December 31, 2015		181		408		(257	)		332

Property and Equipment

Property and equipment consists of the following:


	Estimated Useful Life (in Years)		December 31,
			2017		2016
Computer equipment		3		17,157	$	18,750
Software		3 - 6		17,996		14,648
Furniture and fixtures		5		2,396		1,995
Leasehold improvements		Shorter of lease term or the estimated useful life		1,366		1,202

				38,915		36,595
Less accumulated depreciation and amortization				29,772		27,331

			$	9,143	$	9,264

Potentially Dilutive Common Shares Excluded from Computation of Dilutive Net Loss per Share


	Year Ended December 31,
	2017		2016		2015
Options outstanding		4,127		4,291		4,139
Restricted stock units outstanding		2,050		1,668		1,043
Warrants		—		19		28

Weighted Average Assumptions Utilized


	Year Ended December 31,
	2017			2016			2015
Risk-free interest rate		2.08	%		1.75	%		1.96	%
Expected volatility		42	%		45	%		46	%
Expected life (in years)		6.1			6.2			6.2
Expected dividend yield		—			—			—

Intangible Assets and Goodwill (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Finite Lived Intangible Assets

Finite-lived intangible assets consist of the following as of December 31, 2017:


Description	Weighted Average Estimated Useful Life (in years)		Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Developed technology		7	$	14,223	$	9,431	$	4,792
Customer relationships		11		6,257		2,813		3,444
Non-compete agreements		3		1,912		1,912		—
Tradename		3		368		368		—

Total			$	22,760	$	14,524	$	8,236

Finite-lived intangible assets consist of the following as of December 31, 2016:


Description	Weighted Average Estimated Useful Life (in years)		Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Developed technology		7	$	14,223	$	7,400	$	6,823
Customer relationships		11		6,257		2,147		4,110
Non-compete agreements		3		1,912		1,875		37
Tradename		3		368		368		—

Total			$	22,760	$	11,790	$	10,970

Estimated Remaining Amortization Expense

The estimated remaining amortization expense for each of the five succeeding years and thereafter is as follows:


Year Ending December 31,	Amount
2018	$	2,317
2019		1,603
2020		1,585
2021		1,327
2022		370
2023 and thereafter		1,034

Total	$	8,236

Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2017

Fair Value Disclosures [Abstract]

Company's Financial Instruments Carried at Fair Value Using Lowest Level of Input

The following tables set forth the Company’s financial instruments carried at fair value using the lowest level of input as of December 31, 2017 and 2016:


	December 31, 2017
	Quoted Prices in Active Markets for Identical Items (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Assets:
Money market funds	$	8,160	$	—	$	—	$	8,160

Total assets	$	8,160	$	—	$	—	$	8,160


	December 31, 2016
	Quoted Prices in Active Markets for Identical Items (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Assets:
Money market funds	$	12,871	$	—	$	—	$	12,871

Total assets	$	12,871	$	—	$	—	$	12,871

Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Future Minimum Rental Commitments Under Operating Leases

Future minimum rental commitments under operating leases at December 31, 2017 are as follows:


Year Ending December 31,	Operating Lease Commitments
2018	$	8,384
2019		6,990
2020		5,165
2021		4,952
2022		2,013
2023 and thereafter		2,094

	$	29,598

Future Minimum Rental Commitments Under Capital Leases

Future minimum rental commitments under capital leases at December 31, 2017 are as follows:


Year Ending December 31,	Capital Lease Commitments
2018	$	231
Less – interest on capital leases		3

	$	228

Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2017

Equity [Abstract]

Summary of Stock Option Activity

The following is a summary of the stock option activity for all stock option plans during the year ended December 31, 2017:


	Number of Shares			Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term (In Years)		Aggregate Intrinsic Value ⁽¹⁾
Outstanding at December 31, 2016		4,150,584		$	7.17
Granted		483,727			7.03
Exercised		(229,127	)		2.27			$	1,243
Cancelled		(480,871	)		8.05

Outstanding at December 31, 2017		3,924,313		$	7.33		6.30	$	3,783

Exercisable at December 31, 2017		2,430,839		$	7.23		5.37	$	3,052

(1)	The aggregate intrinsic value was calculated based on the positive difference between the estimated fair value of the Company’s common stock on December 31, 2017 of $7.10 per share, or the date of exercise, as appropriate, and the exercise price of the underlying options.

Summary of RSU Activity

The following table summarizes the RSU activity during the year ended December 31, 2017:


	Shares			Weighted Average Grant Date Fair Value
Unvested by December 31, 2016		1,902,577		$	7.84
Granted		1,189,973			6.95
Vested and issued		(561,133	)		7.47
Cancelled		(312,713	)		7.80

Unvested by December 31, 2017		2,218,704		$	7.44

Schedule of Shares of Common Stock Reserved for Future Issuance

At December 31, 2017, the Company has reserved the following shares of common stock for future issuance:


	December 31, 2017
Common stock options outstanding		3,924,313
Restricted stock unit awards outstanding		2,218,704
Shares available for issuance under all stock-based compensation plans		1,429,022

Total shares of authorized common stock reserved for future issuance		7,572,039

Income Taxes (Tables)

12 Months Ended

Dec. 31, 2017

Income Tax Disclosure [Abstract]

Schedule of Loss before Provision for Income Taxes

Loss before the provision for income taxes consists of the following:


	Year Ended December 31,
	2017			2016			2015
Domestic	$	(20,528	)	$	(10,756	)	$	(8,028	)
Foreign		1,379			1,180			839

Total	$	(19,149	)	$	(9,576	)	$	(7,189	)

Schedule of Provision for Income Taxes

The provision for income taxes in the accompanying consolidated financial statements consists of the following:


	Year Ended December 31,
	2017		2016			2015
Current provision:
Federal	$	—	$	—		$	—
State		21		33			29
Foreign		311		424			389

Total current		332		457			418

Deferred (benefit):
Federal		—		—			—
State		—		—			—
Foreign		38		(47	)		(27	)

Total deferred		38		(47	)		(27	)

Total provision	$	370	$	410		$	391

Schedule of Reconciliation of U.S. Federal Statutory Rate to Effective Tax Rate

A reconciliation of the U.S. federal statutory rate to the Company’s effective tax rate is as follows:


	Year Ended December 31,
	2017			2016			2015
Tax at statutory rates		(34.0	)%		(34.0	)%		(34.0	)%
State income taxes		(4.1	)		(6.1	)		3.4
Change in tax rate		103.9			0.1			3.0
Permanent differences		7.1			11.7			34.7
Foreign rate differential		(0.7	)		(1.1	)		(1.2	)
Research and development credits		(3.7	)		(6.7	)		(9.6	)
Change in valuation allowance		(66.3	)		40.8			7.7
Other, net		(0.3	)		(0.4	)		1.4

Effective tax rate		1.9	%		4.3	%		5.4	%

Schedule of Income Tax Effect of Each Type of Temporary Difference and Carryforward

The approximate income tax effect of each type of temporary difference and carryforward as of December 31, 2017 and 2016 is as follows:


	As of December 31,
	2017			2016
Deferred tax assets:
Net operating loss carry-forwards	$	37,964		$	45,850
Tax credit carry-forwards		9,173			7,654
Stock-based compensation		1,856			2,236
Fixed Assets		267			154
Account receivable reserves		189			219
Accrued compensation		851			2,232
Capitalized start-up costs		138			279
Other temporary differences		371			761

Total deferred tax assets		50,809			59,385
Deferred tax liabilities:
Intangible assets		(3,611	)		(5,962	)

Total deferred tax liabilities		(3,611	)		(5,962	)

Valuation allowance		(47,111	)		(53,302	)

Net deferred tax assets	$	87		$	121

Accrued Expenses (Tables)

12 Months Ended

Dec. 31, 2017

Payables and Accruals [Abstract]

Components of Accrued Expenses

Accrued expenses consist of the following:


	December 31,
	2017		2016
Accrued payroll and related benefits	$	4,436	$	7,089
Accrued sales and other taxes		1,363		2,275
Accrued professional fees and outside contractors		2,021		1,082
Accrued content delivery		2,390		2,013
Accrued other liabilities		3,411		3,246

Total	$	13,621	$	15,705

Segment Information (Tables)

12 Months Ended

Dec. 31, 2017

Segment Reporting [Abstract]

Total Revenue to Unaffiliated Customers by Geographic Area, Based on Location of Customer

Total revenue to unaffiliated customers by geographic area, based on the location of the customer, was as follows:


	Year Ended December 31,
	2017		2016		2015
Revenue:
North America	$	91,358	$	92,912	$	86,106
Europe		24,425		25,196		25,380
Japan		16,881		15,230		9,061
Asia Pacific		22,539		15,617		12,380
Other		710		1,311		1,779

Total revenue	$	155,913	$	150,266	$	134,706

Quarterly Financial Data (Tables)

12 Months Ended

Dec. 31, 2017

Quarterly Financial Information Disclosure [Abstract]

Summary of Quarterly Financial Data

The following table presents certain unaudited quarterly financial information for the eight quarters in the period ended December 31, 2017.


	For the three months ended:
	Dec. 31, 2017			Sep. 30, 2017			Jun. 30, 2017			Mar. 31, 2017			Dec. 31, 2016			Sep. 30, 2016			Jun. 30, 2016			Mar. 31, 2016
Revenue	$	40,101		$	39,487		$	38,753		$	37,572		$	38,625		$	38,389		$	36,960		$	36,292
Gross profit		23,783			22,983			22,175			22,354			23,272			24,612			23,507			23,028
Loss from operations		(1,331	)		(5,349	)		(7,884	)		(5,132	)		(3,684	)		(1,552	)		(2,211	)		(1,531	)
Net loss		(1,372	)		(5,396	)		(7,678	)		(5,073	)		(4,363	)		(1,618	)		(2,398	)		(1,607	)

Basic net loss per share		(0.04	)		(0.16	)		(0.22	)		(0.15	)		(0.13	)		(0.05	)		(0.07	)		(0.05	)
Diluted net loss per share		(0.04	)		(0.16	)		(0.22	)		(0.15	)		(0.13	)		(0.05	)		(0.07	)		(0.05	)

Summary of Significant Accounting Policies - Additional Information (Detail)		1 Months Ended	12 Months Ended
	Dec. 31, 2016 USD ($) Customer	Feb. 29, 2016 USD ($)	Dec. 31, 2018	Dec. 31, 2017 USD ($) Customer $ / shares Plans	Dec. 31, 2016 USD ($) Customer $ / shares	Dec. 31, 2015 USD ($) Customer $ / shares	Mar. 31, 2017 USD ($)
Accounting Policies [Line Items]
Short-term investments	$ 0			$ 0	$ 0
Long-term investments	$ 0			$ 0	$ 0
Number of customers accounted for more than 10% of total revenue \| Customer	0			0	0	0
Threshold percentage of total revenues required for major customer classification				10.00%	10.00%	10.00%
Number of customers accounted for more than 10% of net accounts receivable \| Customer	0			0	0
Capitalized software development costs	$ 4,038,000			$ 3,239,000	$ 4,038,000	$ 1,488,000
Amortization of capitalized internal-use software development costs				1,867,000	690,000	469,000
Depreciation and amortization, expense				4,523,000	4,860,000	5,575,000
Repayment of equipment financing				307,000	271,000	$ 1,704,000
Recorded liabilities for uncertain tax position	0			$ 0	$ 0
Number of stock-based compensation plans \| Plans				4
Expected dividend yield				$ 0
Weighted-average fair value of options granted \| $ / shares				$ 3.08	$ 4.01	$ 3.10
Stock-based compensation				$ 7,243,000	$ 6,012,000	$ 6,014,000
Unrecognized stock-based compensation expense				$ 18,232,000
Unrecognized compensation cost, recognition period				2 years 22 days
Incremental stock-based compensation expense arising from the modification				$ 186,000
Additional of stock-based compensation expense due to accelerates vesting schedule				220,000
Stock based compensation expense, estimated forfeiture rate					17.00%	17.00%
Advertising costs				$ 2,485,000	$ 2,137,000	$ 2,081,000
Federal corporate tax rate				34.00%	34.00%	34.00%
Accumulated Deficit [Member]
Accounting Policies [Line Items]
Cumulative effect of change due to new accounting pronouncement				$ (197,000)
Additional Paid-in Capital [Member]
Accounting Policies [Line Items]
Cumulative effect of change due to new accounting pronouncement				$ 197,000
ASU 2016-09 [Member] \| Accumulated Deficit [Member]
Accounting Policies [Line Items]
Cumulative effect of change due to new accounting pronouncement							$ 197,000
ASU 2016-09 [Member] \| Additional Paid-in Capital [Member]
Accounting Policies [Line Items]
Cumulative effect of change due to new accounting pronouncement							$ 197,000
December Equipment Financing Agreement [Member]
Accounting Policies [Line Items]
Debt issuance date				Dec. 31, 2015
Computer equipment and support purchased				$ 604,000
Repayment of equipment financing		$ 604,000
Scenario, Forecast [Member]
Accounting Policies [Line Items]
Federal corporate tax rate			21.00%
Facility Closing [Member]
Accounting Policies [Line Items]
Loss on disposal of assets	150,000			150,000
Settlement amount under termination agreement upon facility closure	695,000			695,000
Disposal group, cost of revenue	845,000			$ 845,000
Software [Member]
Accounting Policies [Line Items]
Estimated Useful Life (in Years)				3 years
Computer Equipment [Member]
Accounting Policies [Line Items]
Estimated Useful Life (in Years)				3 years
Computer Equipment [Member] \| Facility Closing [Member]
Accounting Policies [Line Items]
Disposal of computer equipment	$ 1,900,000				$ 1,900,000

Summary of Significant Accounting Policies - Schedule of Cash and Cash Equivalents (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Investment Holdings [Line Items]
Amortized Cost	$ 26,132	$ 36,813
Fair Market Value	26,132	36,813
Balance Per Balance Sheet	26,132	36,813
Cash [Member]
Investment Holdings [Line Items]
Amortized Cost	17,972	23,942
Fair Market Value	17,972	23,942
Balance Per Balance Sheet	17,972	23,942
Money Market Funds [Member]
Investment Holdings [Line Items]
Amortized Cost	8,160	12,871
Fair Market Value	8,160	12,871
Balance Per Balance Sheet	$ 8,160	$ 12,871

Summary of Significant Accounting Policies - Summary of Changes in Company's Allowance for Doubtful Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accounting Policies [Abstract]
Balance at Beginning of Period	$ 154	$ 332	$ 181
Provision	203	230	408
Write-offs	(211)	(408)	(257)
Balance at End of Period	$ 146	$ 154	$ 332

Summary of Significant Accounting Policies - Property and Equipment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 38,915	$ 36,595
Less accumulated depreciation and amortization	29,772	27,331
Property and equipment, net	$ 9,143	9,264
Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Life (in Years)	3 years
Property and equipment, gross	$ 17,157	18,750
Software [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Life (in Years)	3 years
Property and equipment, gross	$ 17,996	14,648
Software [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Life (in Years)	3 years
Software [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Life (in Years)	6 years
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Life (in Years)	5 years
Property and equipment, gross	$ 2,396	1,995
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 1,366	$ 1,202

Summary of Significant Accounting Policies - Potentially Dilutive Common Shares Excluded from Computation of Dilutive Net Loss per Share (Detail) - shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Options Outstanding [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive common shares excluded from the computation of weighted-average shares outstanding	4,127	4,291	4,139
RSUs [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive common shares excluded from the computation of weighted-average shares outstanding	2,050	1,668	1,043
Warrants [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive common shares excluded from the computation of weighted-average shares outstanding		19	28

Summary of Significant Accounting Policies - Weighted Average Assumptions Utilized (Detail) - Stock Compensation Plan [Member]	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	2.08%	1.75%	1.96%
Expected volatility	42.00%	45.00%	46.00%
Expected life (in years)	6 years 1 month 6 days	6 years 2 months 12 days	6 years 2 months 12 days
Expected dividend yield	0.00%	0.00%	0.00%

Intangible Assets and Goodwill - Finite Lived Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets Gross Carrying Value	$ 22,760	$ 22,760
Finite Lived Intangible Assets Accumulated Amortization	14,524	11,790
Finite Lived Intangible Assets Net Carrying Value	$ 8,236	$ 10,970
Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets Weighted Average Estimated Useful Life (in years)	7 years	7 years
Finite Lived Intangible Assets Gross Carrying Value	$ 14,223	$ 14,223
Finite Lived Intangible Assets Accumulated Amortization	9,431	7,400
Finite Lived Intangible Assets Net Carrying Value	$ 4,792	$ 6,823
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets Weighted Average Estimated Useful Life (in years)	11 years	11 years
Finite Lived Intangible Assets Gross Carrying Value	$ 6,257	$ 6,257
Finite Lived Intangible Assets Accumulated Amortization	2,813	2,147
Finite Lived Intangible Assets Net Carrying Value	$ 3,444	$ 4,110
Non-Compete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets Weighted Average Estimated Useful Life (in years)	3 years	3 years
Finite Lived Intangible Assets Gross Carrying Value	$ 1,912	$ 1,912
Finite Lived Intangible Assets Accumulated Amortization	$ 1,912	1,875
Finite Lived Intangible Assets Net Carrying Value		$ 37
Tradename [Member]
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets Weighted Average Estimated Useful Life (in years)	3 years	3 years
Finite Lived Intangible Assets Gross Carrying Value	$ 368	$ 368
Finite Lived Intangible Assets Accumulated Amortization	$ 368	$ 368

Intangible Assets and Goodwill - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense related to intangible assets	$ 2,734	$ 3,116	$ 3,112
Goodwill	$ 50,776	$ 50,776

Intangible Assets and Goodwill - Estimated Remaining Amortization Expense (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
2018	$ 2,317
2019	1,603
2020	1,585
2021	1,327
2022	370
2023 and thereafter	1,034
Total	$ 8,236	$ 10,970

Fair Value Measurements - Company's Financial Instruments Carried at Fair Value Using Lowest Level of Input (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	$ 8,160	$ 12,871
Total assets	8,160	12,871
Quoted Prices in Active Markets for Identical Items (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	8,160	12,871
Total assets	$ 8,160	$ 12,871

Commitments and Contingencies - Future Minimum Rental Commitments Under Operating Lease (Detail) $ in Thousands	Dec. 31, 2017 USD ($)
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2018	$ 8,384
2019	6,990
2020	5,165
2021	4,952
2022	2,013
2023 and thereafter	2,094
Total	$ 29,598

Commitments and Contingencies - Additional Information (Detail)				12 Months Ended
	Dec. 01, 2017 Patents	Oct. 26, 2017 Patents	Dec. 31, 2016 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Commitment And Contingencies [Line Items]
Option to renewal description				The Company's primary office lease has the option to renew the lease for two successive periods of five years each.
Deferred rent and rent incentives			$ 1,579,000	$ 1,464,000	$ 1,579,000
Deferred rent and rent incentives, noncurrent			1,320,000	1,102,000	1,320,000
Rent expense				6,608,000	6,334,000	$ 6,831,000
Income from sublease rental				285,000	$ 219,000	$ 185,000
Total assets under incremental capital leases				1,200,000
Accumulated amortization related to capital leases				940,000,000
Non-cancelable commitments due in 2018				15,833,000
Non-cancelable commitments due in 2019				7,823,000
Non-cancelable commitments due in 2020				173,000
Cost for Guarantees and indemnities				0
Realtime Adaptive Streaming LLC [Member]
Commitment And Contingencies [Line Items]
Complaint filed against patents allegedly infringed \| Patents	2	5
Facility Closing [Member]
Commitment And Contingencies [Line Items]
Loss on disposal of assets			150,000	150,000
Disposal group, cost of revenue			845,000	845,000
Settlement amount under termination agreement upon facility closure			$ 695,000	695,000
Letter of Credit [Member]
Commitment And Contingencies [Line Items]
Debt instrument, face amount				$ 2,404,000

Commitments and Contingencies - Future Minimum Rental Commitments Under Capital Leases (Detail) $ in Thousands	Dec. 31, 2017 USD ($)
Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2018	$ 231
Less - interest on capital leases	3
Capital Lease Commitments	$ 228

Stockholders' Equity - Additional Information (Detail) $ / shares in Units, $ in Thousands			1 Months Ended		12 Months Ended
	Dec. 31, 2017 shares	Dec. 31, 2016 shares	Aug. 31, 2016 shares	Sep. 30, 2006 Lenders $ / shares shares	Dec. 31, 2017 Plans shares	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 Employees shares	Dec. 31, 2012 Employees shares	Feb. 28, 2012 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock-based compensation plans \| Plans					4
Number of shares reserved for issuance under the equity incentive plan	7,572,039				7,572,039
Restricted stock units, number of common shares called by RSUs									77,100
Number of new employees pursuant to the RSU Plan \| Employees									15
Number of shares available for issuance	1,429,022				1,429,022
Aggregate Intrinsic Value, Exercised \| $						$ 5,159	$ 281
Shares exercised during period			28,028						18,685
Shares issued during period, share-based compensation			20,528						15,781
Unicorn Media [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares received in exchange of liabilities released	135,000	135,000
Series B Redeemable Convertible Preferred Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares called by warrants				46,713
Exercise price of warrants \| $ / shares				$ 3.21
Number of lenders to whom warrants issued \| Lenders				2
Warrants expiration date				Aug. 31, 2016
Warrants, fair value \| $										$ 395
2004 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares reserved for issuance under the equity incentive plan	7,397,843				7,397,843
Shares transferred in share based compensation plan									124,703
2012 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares reserved for issuance under the equity incentive plan	1,700,000				1,700,000
Shares reserved for issuance under the equity incentive plan, annual increase as a percentage of outstanding shares at year end					4.00%
Overhang limit for number of shares reserved for issuance under the equity incentive plan					30.00%
2012 Plan [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation, vesting period					3 months
2012 Plan [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation, vesting period					4 years
2014 Stock Inducement Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of new employees pursuant to the RSU Plan \| Employees								61
Equity incentive plan, shares of common stock authorized								578,350

Stockholders' Equity - Summary of Stock Option Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, Outstanding at December 31, 2017	3,924,313
Aggregate Intrinsic Value, Exercised		$ 5,159	$ 281
Options Outstanding [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, Outstanding at December 31, 2016	4,150,584
Shares, Granted	483,727
Shares, Exercised	(229,127)
Shares, Cancelled	(480,871)
Shares, Outstanding at December 31, 2017	3,924,313	4,150,584
Shares, Exercisable at December 31, 2017	2,430,839
Weighted-Average Exercise Price, Outstanding at December 31, 2016	$ 7.17
Weighted-Average Exercise Price, Granted	7.03
Weighted-Average Exercise Price, Exercised	2.27
Weighted-Average Exercise Price, Cancelled	8.05
Weighted-Average Exercise Price, Outstanding at December 31, 2017	7.33	$ 7.17
Weighted-Average Exercise Price, Exercisable at December 31, 2017	$ 7.23
Weighted-Average Remaining Contractual Term, Outstanding at December 31, 2017	6 years 3 months 19 days
Weighted-Average Remaining Contractual Term, Exercisable at December 31, 2017	5 years 4 months 13 days
Aggregate Intrinsic Value, Exercised	$ 1,243
Aggregate Intrinsic Value, Outstanding at December 31, 2017	3,783
Aggregate Intrinsic Value, Exercisable at December 31, 2017	$ 3,052

Stockholders' Equity - Summary of RSU Activity (Detail)	12 Months Ended
Stockholders' Equity - Summary of RSU Activity (Detail)	Dec. 31, 2017 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Unvested Shares, Ending Balance	2,218,704
RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Unvested Shares, Beginning Balance	1,902,577
Granted	1,189,973
Vested and issued	(561,133)
Cancelled	(312,713)
Unvested Shares, Ending Balance	2,218,704
Weighted Average Grant Date Fair Value, Beginning Balance \| $ / shares	$ 7.84
Weighted Average Grant Date Fair Value, Granted \| $ / shares	6.95
Weighted Average Grant Date Fair Value, Vested and issued \| $ / shares	7.47
Weighted Average Grant Date Fair Value, Cancelled \| $ / shares	7.80
Weighted Average Grant Date Fair Value, Ending Balance \| $ / shares	$ 7.44

Stockholders' Equity - Schedule of Shares of Common Stock Reserved for Future Issuance (Detail)	Dec. 31, 2017 shares
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Common stock options outstanding	3,924,313
Restricted stock unit awards outstanding	2,218,704
Shares available for issuance under all stock-based compensation plans	1,429,022
Total shares of authorized common stock reserved for future issuance	7,572,039

Income Taxes - Schedule of Loss before Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure By Jurisdiction [Abstract]
Domestic	$ (20,528)	$ (10,756)	$ (8,028)
Foreign	1,379	1,180	839
Loss before income taxes	$ (19,149)	$ (9,576)	$ (7,189)

Income Taxes - Schedule of Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current provision:
Federal	$ 0	$ 0	$ 0
State	21	33	29
Foreign	311	424	389
Total current	332	457	418
Deferred (benefit):
Federal	0	0	0
State	0	0	0
Foreign	38	(47)	(27)
Total deferred	38	(47)	(27)
Total provision	$ 370	$ 410	$ 391

Income Taxes - Schedule of Reconciliation of U.S. Federal Statutory Rate to Effective Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Tax at statutory rates	(34.00%)	(34.00%)	(34.00%)
State income taxes	(4.10%)	(6.10%)	3.40%
Change in tax rate	103.90%	0.10%	3.00%
Permanent differences	7.10%	11.70%	34.70%
Foreign rate differential	(0.70%)	(1.10%)	(1.20%)
Research and development credits	(3.70%)	(6.70%)	(9.60%)
Change in valuation allowance	(66.30%)	40.80%	7.70%
Other, net	(0.30%)	(0.40%)	1.40%
Effective tax rate	1.90%	4.30%	5.40%

Income Taxes - Schedule of Income Tax Effect of Each Type of Temporary Difference and Carryforward (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deferred tax assets:
Net operating loss carry-forwards	$ 37,964	$ 45,850
Tax credit carry-forwards	9,173	7,654
Stock-based compensation	1,856	2,236
Fixed Assets	267	154
Account receivable reserves	189	219
Accrued compensation	851	2,232
Capitalized start-up costs	138	279
Other temporary differences	371	761
Total deferred tax assets	50,809	59,385
Deferred tax liabilities:
Intangible assets	(3,611)	(5,962)
Total deferred tax liabilities	(3,611)	(5,962)
Valuation allowance	(47,111)	(53,302)
Net deferred tax assets	$ 87	$ 121

Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Taxes [Line Items]
Decrease in valuation allowance		$ (6,200,000)
Valuation allowance		$ 47,111,000	$ 53,302,000
Net operating losses carried forward, expiration date		Dec. 31, 2037
Research and development tax credit, expiration date		Dec. 31, 2037
Recorded liabilities for uncertain tax position		$ 0	0
Accrued interest or penalties related to uncertain tax positions		$ 0	$ 0
Federal corporate tax rate		34.00%	34.00%	34.00%
Federal [Member]
Income Taxes [Line Items]
Net operating losses		$ 161,900,000
Research and development tax credits		6,100,000
Scenario, Forecast [Member]
Income Taxes [Line Items]
Federal corporate tax rate	21.00%
Japan [Member]
Income Taxes [Line Items]
Valuation allowance		0	$ 0
State [Member]
Income Taxes [Line Items]
Net operating losses		66,700,000
Research and development tax credits		$ 3,900,000

Debt - Additional Information (Detail) - USD ($)	1 Months Ended	12 Months Ended
Debt - Additional Information (Detail) - USD ($)	Feb. 29, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Debt instrument term		If the outstanding principal during any month is at least $15.0 million, the Company must also maintain a minimum net income threshold based on non-GAAP operating measures.
Debt amount outstanding		$ 0
Repayment of equipment financing		307,000	$ 271,000	$ 1,704,000
December Equipment Financing Agreement [Member]
Debt Instrument [Line Items]
Debt amount outstanding		$ 26,000
Debt issuance date		Dec. 31, 2015
Computer equipment and support purchased		$ 604,000
Repayment of equipment financing	$ 604,000
Repayment period of obligation under the agreement		2 years
Secured Line of Credit [Member]
Debt Instrument [Line Items]
Line of credit, agreement start date		Nov. 19, 2015
Line of credit maximum borrowing capacity		$ 20,000,000
Percentage points added to prime rate or LIBOR		2.50%
Minimum [Member]
Debt Instrument [Line Items]
Minimum outstanding principal threshold limit		$ 15,000,000

Accrued Expenses - Components of Accrued Expenses (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Accrued Liabilities, Current [Abstract]
Accrued payroll and related benefits	$ 4,436	$ 7,089
Accrued sales and other taxes	1,363	2,275
Accrued professional fees and outside contractors	2,021	1,082
Accrued content delivery	2,390	2,013
Accrued other liabilities	3,411	3,246
Total	$ 13,621	$ 15,705

Segment Information - Additional Information (Detail) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2017 USD ($) Segment	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of operating segment \| Segment									1
Revenues from customers	$ 40,101	$ 39,487	$ 38,753	$ 37,572	$ 38,625	$ 38,389	$ 36,960	$ 36,292	$ 155,913	$ 150,266	$ 134,706
Revenue percentage from other country to the company's total revenue									10.00%	10.00%
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues from customers									$ 85,459	$ 87,302	80,455
Japan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues from customers									$ 16,881	$ 15,230	$ 9,061

Segment Information - Total Revenue to Unaffiliated Customers by Geographic Area, Based on Location of Customer (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 40,101	$ 39,487	$ 38,753	$ 37,572	$ 38,625	$ 38,389	$ 36,960	$ 36,292	$ 155,913	$ 150,266	$ 134,706
North America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									91,358	92,912	86,106
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									24,425	25,196	25,380
Japan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									16,881	15,230	9,061
Asia Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									22,539	15,617	12,380
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									$ 710	$ 1,311	$ 1,779

Quarterly Financial Data - Summary of Quarterly Financial Data (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Revenue	$ 40,101	$ 39,487	$ 38,753	$ 37,572	$ 38,625	$ 38,389	$ 36,960	$ 36,292	$ 155,913	$ 150,266	$ 134,706
Gross profit	23,783	22,983	22,175	22,354	23,272	24,612	23,507	23,028	91,295	94,419	88,229
Loss from operations	(1,331)	(5,349)	(7,884)	(5,132)	(3,684)	(1,552)	(2,211)	(1,531)	(19,696)	(8,978)	(6,931)
Net loss	$ (1,372)	$ (5,396)	$ (7,678)	$ (5,073)	$ (4,363)	$ (1,618)	$ (2,398)	$ (1,607)	$ (19,519)	$ (9,986)	$ (7,580)
Basic net loss per share	$ (0.04)	$ (0.16)	$ (0.22)	$ (0.15)	$ (0.13)	$ (0.05)	$ (0.07)	$ (0.05)
Diluted net loss per share	$ (0.04)	$ (0.16)	$ (0.22)	$ (0.15)	$ (0.13)	$ (0.05)	$ (0.07)	$ (0.05)

401(k) Savings Plan	12 Months Ended
401(k) Savings Plan	Dec. 31, 2017
Retirement Benefits [Abstract]
401(k) Savings Plan	11. 401(k) Savings Plan The Company maintains a defined contribution savings plan covering all eligible U.S. employees under Section 401(k) of the Internal Revenue Code. Company contributions to the plan may be made at the discretion of the Board. During the years ended December 31, 2017, 2016 and 2015, the Company has made contributions to the plan of $425, $336 and $276, respectively.

Business Description - Additional Information (Detail)	12 Months Ended
Business Description - Additional Information (Detail)	Dec. 31, 2017 Subsidiaries
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of wholly-owned subsidiaries	9

401(k) Savings Plan - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Retirement Benefits [Abstract]
Contribution made under the plan	$ 425	$ 336	$ 276

Stockholders' Equity - Summary of Stock Option Activity (Parenthetical) (Detail)	Dec. 31, 2017 $ / shares
Options Outstanding [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate Intrinsic Value, Estimated per share fair value of common stock	$ 7.10