Immersion (IMMR) 10-Q 30 Oct 15 2015 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2015	Oct. 22, 2015
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	Q3
Trading Symbol	IMMR
Entity Registrant Name	IMMERSION CORP
Entity Central Index Key	1,058,811
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		28,284,981

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 33,167	$ 14,380
Short-term investments	33,990	42,981
Accounts and other receivables (net of allowances for doubtful accounts of $22 and $28)	1,503	3,021
Deferred income taxes	2,921	9,377
Prepaid expenses and other current assets	3,022	845
Total current assets	74,603	70,604
Property and equipment, net	4,778	1,207
Deferred income tax assets	21,458	25,419
Prepaid income taxes	7,495	0
Intangibles and other assets, net	269	291
Total assets	108,603	97,521
Current liabilities:
Accounts payable	1,539	669
Accrued compensation	3,631	1,906
Other current liabilities	1,639	2,225
Deferred revenue	12,664	7,779
Total current liabilities	19,473	12,579
Long-term deferred revenue	3,983	7,827
Other long-term liabilities	752	512
Total liabilities	$ 24,208	$ 20,918
Contingencies
Stockholders’ equity:
Common stock and additional paid-in capital — $0.001 par value; 100,000,000 shares authorized; 34,795,372 and 34,225,778 shares issued, respectively; 28,284,981 and 27,715,387 shares outstanding, respectively	$ 210,939	$ 204,876
Accumulated other comprehensive income	111	102
Accumulated deficit	(81,086)	(82,806)
Treasury stock at cost: 6,510,391 shares	(45,569)	(45,569)
Total stockholders’ equity	84,395	76,603
Total liabilities and stockholders’ equity	$ 108,603	$ 97,521

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 22	$ 28
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common Stock, shares authorized	100,000,000	100,000,000
Common Stock, shares issued	34,795,372	34,225,778
Common Stock, shares outstanding	28,284,981	27,715,387
Treasury Stock, shares	6,510,391	6,510,391

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income and Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenues:
Royalty and license	$ 13,944	$ 11,714	$ 45,895	$ 38,473
Development, services, and other	369	337	928	845
Total revenues	14,313	12,051	46,823	39,318
Costs and expenses:
Cost of revenues (exclusive of amortization of intangibles shown separately below)	117	104	347	325
Sales and marketing	3,198	2,238	11,078	7,638
Research and development	3,471	2,718	10,697	8,782
General and administrative	6,241	5,274	21,253	17,745
Amortization of intangibles	3	15	18	55
Total costs and expenses	13,030	10,349	43,393	34,545
Operating income	1,283	1,702	3,430	4,773
Interest and other income (expense)	(84)	(30)	(63)	107
Income before provision for income taxes	1,199	1,672	3,367	4,880
Provision for income taxes	(1,015)	(599)	(1,647)	(1,774)
Net income	$ 184	$ 1,073	$ 1,720	$ 3,106
Basic net income per share (in dollars per share)	$ 0.01	$ 0.04	$ 0.06	$ 0.11
Shares used in calculating basic net income per share	28,190	28,505	28,027	28,420
Diluted net income per share (in dollars per share)	$ 0.01	$ 0.04	$ 0.06	$ 0.11
Shares used in calculating diluted net income per share	29,134	29,351	28,893	29,355
Other comprehensive income
Change in unrealized gains on short-term investments	$ 5	$ 3	$ 9	$ 5
Total other comprehensive income	5	3	9	5
Total comprehensive income	$ 189	$ 1,076	$ 1,729	$ 3,111

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash flows provided by operating activities:
Net income	$ 1,720	$ 3,106
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of property and equipment	772	364
Amortization of intangibles	18	55
Stock-based compensation	4,245	4,058
Allowance for doubtful accounts	(6)	3
Loss on disposal of equipment	10	19
Changes in operating assets and liabilities:
Accounts and other receivables	1,524	(2,397)
Deferred income taxes	10,417	1,539
Prepaid income taxes	(7,495)	0
Prepaid expenses and other current assets	(2,177)	(395)
Other operating assets	(24)	(20)
Accounts payable	870	337
Accrued compensation and other current liabilities	1,072	(3,209)
Income taxes payable	97	35
Deferred revenue	1,041	(336)
Other long-term liabilities	240	(77)
Net cash provided by operating activities	12,324	3,082
Cash flows provided by investing activities:
Purchases of short-term investments	(28,972)	(37,960)
Proceeds from maturities of short-term investments	38,000	42,000
Purchases of property and equipment	(4,383)	(734)
Net cash provided by investing activities	4,645	3,306
Cash flows provided by (used in) financing activities:
Issuance of common stock under employee stock purchase plan	367	381
Exercise of stock options	1,451	1,229
Purchases of treasury stock	0	(11,995)
Net cash provided by (used in) financing activities	1,818	(10,385)
Net increase (decrease) in cash and cash equivalents	18,787	(3,997)
Cash and cash equivalents:
Beginning of period	14,380	14,136
End of period	33,167	10,139
Supplemental disclosure of cash flow information
Cash paid for taxes	136	46
Supplemental disclosure of noncash operating, investing, and financing activities
Amounts accrued for property and equipment	30	8
Release of Restricted Stock Units and Awards under company stock plan	$ 2,771	$ 3,745

Significant Accounting Policies

Significant Accounting Policies	9 Months Ended
	Sep. 30, 2015
Accounting Policies [Abstract]
Significant Accounting Policies	SIGNIFICANT ACCOUNTING POLICIES Description of Business Immersion Corporation (the “Company”) was incorporated in 1993 in California and reincorporated in Delaware in 1999. It is an intellectual property (“IP”) and software licensing company focused on the creation, design, development, and licensing of patented haptic innovations and software that allow people to use their sense of touch more fully when operating a wide variety of digital devices. Principles of Consolidation and Basis of Presentation The condensed consolidated financial statements include the accounts of Immersion Corporation and its wholly-owned subsidiaries: Immersion Canada Corporation; Immersion International, LLC; Immersion Medical, Inc.; Immersion Japan K.K.; Immersion Ltd.; Immersion Software Ireland Ltd.; Haptify, Inc.; Immersion (Shanghai) Science & Technology Company, Ltd.; and Immersion Technology International Ltd. All intercompany accounts, transactions, and balances have been eliminated in consolidation. The accompanying condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and with the instructions for Form 10-Q and Article 10 of Regulation S-X and, therefore, do not include all information and footnotes necessary for a complete presentation of the financial position, results of operations, and cash flows, in conformity with GAAP. These condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements included in the Company’s Annual Report on Form 10-K, for the fiscal year ended December 31, 2014 . In the opinion of management, all adjustments consisting of only normal and recurring items necessary for the fair presentation of the financial position and results of operations for the interim periods presented have been included. The results of operations for the three months and nine months ended September 30, 2015 are not necessarily indicative of the results to be expected for the full year. Segment Information The Company develops, licenses, and supports a wide range of software and IP that more fully engage users’ sense of touch when operating digital devices. The Company focuses on the following target application areas: mobility and consumer electronics, automotive, gaming, commercial and industrial, and medical. The Company’s chief operating decision maker (“CODM”) is the Chief Executive Officer. The CODM allocates resources to and assesses the performance of the Company using information about its financial results as one operating and reporting segment. Revenue Recognition The Company recognizes revenues in accordance with applicable accounting standards, including ASC 605-10-S99, “Revenue Recognition” (“ASC 605-10-S99”); ASC 605-25, “Multiple Element Arrangements” (“ASC 605-25”); and ASC 985-605, “Software-Revenue Recognition” (“ASC 985-605”). The Company derives its revenues from two principal sources: royalty and license fees, and development contract and service fees. As described below, management judgments, assumptions, and estimates must be made and used in connection with the revenue recognized in any accounting period. Material differences may result in the amount and timing of revenue for any period based on the judgments and estimates made by management. Specifically, in connection with each transaction, the Company must evaluate whether: (i) persuasive evidence of an arrangement exists, (ii) delivery has occurred, (iii) the fee is fixed or determinable, and (iv) collectibility is probable. The Company applies these criteria as discussed below. • Persuasive evidence of an arrangement exists . For a license arrangement, the Company requires a written contract, signed by both the customer and the Company. • Delivery has occurred . The Company delivers software to customers physically and also delivers software electronically. For electronic deliveries, delivery occurs when the Company provides the customer access codes or “keys” that allow the customer to take immediate possession of the software. • The fee is fixed or determinable . The Company’s arrangement fee is based on the use of standard payment terms, which are those that are generally extended to the majority of customers. For transactions involving extended payment terms, the Company deems these fees not to be fixed or determinable for revenue recognition purposes and revenue is deferred until the fees become due and payable. • Collectibility is probable. To recognize revenue, the Company must judge collectibility of fees, which is done on a customer-by-customer basis pursuant to the Company’s credit review policy. The Company typically sells to customers with whom there is a history of successful collection. For new customers, the Company evaluates the customer’s financial condition and ability to pay. If it is determined that collectibility is not probable based upon the credit review process or the customer’s payment history, revenue is recognized when payment is received. Royalty and license revenue — The Company licenses its patents and software to customers in a variety of industries such as mobility, gaming, automotive, and medical devices. Certain of these are variable fee arrangements where the royalties earned by the Company are based on unit or sales volumes of the respective licensees. The Company also enters into fixed license fee arrangements. The terms of the royalty agreements generally require licensees to give notification of royalties due to the Company within 30 – 45 days of the end of the quarter during which their related sales occur. As the Company is unable to reliably estimate the licensees’ sales in any given quarter to determine the royalties due to it, the Company recognizes royalty revenues based on royalties reported by licensees and when all revenue recognition criteria are met. Certain royalties are based upon customer shipments or revenues and could be subject to change and may result in out of period adjustments. The Company recognizes fixed license fee revenue for licenses when earned under the terms of the agreements, which is generally recognized on a straight-line basis over the expected term of the license. Development, services, and other revenue — Development, services, and other revenue are composed of engineering services (engineering services and/or development contracts), and in limited cases, post contract customer support (“PCS”). Engineering services revenues are recognized under the proportional performance accounting method based on physical completion of the work to be performed or completed performance method. A provision for losses on contracts is made, if necessary, in the period in which the loss becomes probable and can be reasonably estimated. Revisions in estimates are reflected in the period in which the conditions become known. To date, such losses have not been significant. Revenue from PCS is typically recognized over the period of the ongoing obligation, which is generally consistent with the contractual term. Multiple element arrangements — The Company enters into multiple element arrangements in which customers purchase time-based non-exclusive licenses that cannot be resold to others, which include a combination of software and/or IP licenses, engineering services, and in limited cases PCS. For arrangements that are software based and include software and engineering services, the services are generally not essential to the functionality of the software, and customers may purchase engineering services to facilitate the adoption of the Company’s technology, but they may also decide to use their own resources or appoint other engineering service organizations to perform these services. For arrangements that are in substance subscription arrangements, the entire arrangement fee is recognized ratably over the contract term, subject to any limitations related to extended payment terms. For arrangements involving upfront fees for services and royalties earned by the Company based on unit or sales volumes of the respective licensees, and the services are performed ratably over the arrangement or are front-end loaded, the upfront fees are recognized ratably over the contract term and royalties based on unit or sales volume are recognized when they become fixed and determinable. As the Company is unable to reliably estimate the licensees’ sales in any given quarter to determine the royalties due to it, the Company recognizes per unit or sales volume driven royalty revenues based on royalties reported by licensees and when all revenue recognition criteria are met. Recent Accounting Pronouncements In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2014-09 “Revenue from Contracts with Customers: Topic 606” (“ASU 2014-09”) which will supersede the current revenue recognition requirements in Topic 605, Revenue Recognition, and most industry-specific guidance. The core principle of ASU 2014-09 is 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. Further, the guidance requires improved disclosures to help users of financial statements better understand the nature, amount, timing, and uncertainty of revenue that is recognized. In August 2015, the FASB issued ASU No. 2015-14 “Revenue from Contracts with Customers: Deferral of the Effective Date”, which deferred the effective date of ASU 2014-09 for periods beginning after December 15, 2016 to December 15, 2017, with early adoption permitted but not earlier than the original effective date. Accordingly, ASU 2014-09 is effective for the Company in the first quarter of fiscal 2018. The standard permits companies to either apply the requirements retrospectively to all prior periods presented, or apply the requirements in the year of adoption through a cumulative adjustment, and the Company is in the process of determining the method of adoption and evaluating the impact on its consolidated financial statements.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2015
Fair Value Disclosures [Abstract]
Fair Value Measurements	FAIR VALUE MEASUREMENTS Cash Equivalents and Short-term Investments The financial instruments of the Company measured at fair value on a recurring basis are cash equivalents and short-term investments. The Company’s fixed income available-for-sale securities consist of high quality, investment grade securities. The Company values these securities based on pricing from pricing vendors, who may use quoted prices in active markets for identical assets (Level 1) or inputs other than quoted prices that are observable either directly or indirectly (Level 2) in determining fair value. The types of instruments valued based on quoted market prices in active markets include money market securities. Such instruments are generally classified within Level 1 of the fair value hierarchy. The types of instruments valued based on quoted prices in markets that are less active, broker or dealer quotations, or alternative pricing sources with reasonable levels of price transparency are generally classified within Level 2 of the fair value hierarchy and include most U.S. treasury securities and most investment-grade corporate commercial paper. The types of instruments valued based on unobservable inputs which reflect the reporting entity’s own assumptions or data that market participants would use in valuing an instrument are generally classified within Level 3 of the fair value hierarchy. The Company had no Level 3 instruments as of September 30, 2015 and December 31, 2014 . Financial instruments measured at fair value on a recurring basis as of September 30, 2015 and December 31, 2014 are classified based on the valuation technique in the table below: September 30, 2015 Fair value measurements using Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total (In thousands) Assets: U.S. Treasury securities $ — $ 33,990 $ — $ 33,990 Money market accounts 22,025 — — 22,025 Total assets at fair value $ 22,025 $ 33,990 $ — $ 56,015 The above table excludes $11.1 million of cash held in banks. December 31, 2014 Fair value measurements using Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total (In thousands) Assets: U.S. Treasury securities $ — $ 42,981 $ — $ 42,981 Money market accounts 11,524 — — 11,524 Total assets at fair value $ 11,524 $ 42,981 $ — $ 54,505 The above table excludes $2.9 million of cash held in banks. U.S. Treasury securities are classified as short-term investments, and money market accounts are classified as cash equivalents on the Company’s condensed consolidated balance sheets. Short-term Investments September 30, 2015 Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Fair Value (In thousands) U.S. Treasury securities $ 33,980 $ 10 $ — $ 33,990 Total $ 33,980 $ 10 $ — $ 33,990 December 31, 2014 Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Fair Value (In thousands) U.S. Treasury securities $ 42,980 $ 1 $ — $ 42,981 Total $ 42,980 $ 1 $ — $ 42,981 The contractual maturities of the Company’s available-for-sale securities on September 30, 2015 and December 31, 2014 were all due within one year. There were no transfers of instruments between Level 1 and 2 during the three months and nine months ended September 30, 2015 and the year ended December 31, 2014 .

Accounts and Other Receivables

Accounts and Other Receivables	9 Months Ended
	Sep. 30, 2015
Receivables [Abstract]
Accounts and Other Receivables	ACCOUNTS AND OTHER RECEIVABLES September 30, 2015 December 31, 2014 (In thousands) Trade accounts receivable $ 856 $ 2,708 Receivables from vendors and other 647 313 Accounts and other receivables $ 1,503 $ 3,021

Property and Equipment

Property and Equipment	9 Months Ended
	Sep. 30, 2015
Property, Plant and Equipment [Abstract]
Property and Equipment	PROPERTY AND EQUIPMENT September 30, 2015 December 31, 2014 (In thousands) Computer equipment and purchased software $ 3,537 $ 3,418 Machinery and equipment 916 688 Furniture and fixtures 1,361 852 Leasehold improvements 3,838 1,295 Total 9,652 6,253 Less accumulated depreciation (4,874 ) (5,046 ) Property and equipment, net $ 4,778 $ 1,207

Intangibles and Other Assets

Intangibles and Other Assets	9 Months Ended
	Sep. 30, 2015
Intangibles And Other Assets [Abstract]
Intangibles and Other Assets	INTANGIBLES AND OTHER ASSETS September 30, 2015 December 31, 2014 (In thousands) Purchased patents and other purchased intangible assets $ 4,605 $ 4,605 Less: Accumulated amortization of purchased patents and other purchased intangibles (4,597 ) (4,579 ) Purchased patents and other purchased intangible assets, net 8 26 Other assets 261 265 Intangibles and other assets, net $ 269 $ 291 The Company amortizes its intangible assets related to purchased patents, over their estimated useful lives, generally 10 years from the purchase date. Amortization of intangibles was as follows: Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 (In thousands) (In thousands) Amortization of intangibles $ 3 $ 15 $ 18 $ 55 The table below includes estimated remaining annual amortization expense for purchased patents as of September 30, 2015 . Estimated Amortization Expense (In thousands) Remainder of 2015 $ 2 2016 6 Total $ 8

Other Current Liabilities

Other Current Liabilities	9 Months Ended
	Sep. 30, 2015
Other Liabilities, Current [Abstract]
Other Current Liabilities	OTHER CURRENT LIABILITIES September 30, 2015 December 31, 2014 (In thousands) Accrued legal $ 651 $ 1,065 Accrued services 204 518 Income taxes payable 166 69 Other current liabilities 618 573 Total other current liabilities $ 1,639 $ 2,225

Long-term Deferred Revenue

Long-term Deferred Revenue	9 Months Ended
	Sep. 30, 2015
Deferred Revenue Disclosure [Abstract]
Long-term Deferred Revenue	LONG-TERM DEFERRED REVENUE Long-term deferred revenue consisted of the following: September 30, 2015 December 31, 2014 (In thousands) Deferred revenue for Sony Computer Entertainment $ 2,710 $ 7,051 Other deferred revenue 1,273 776 Long-term deferred revenue $ 3,983 $ 7,827 Deferred revenue for Sony Computer Entertainment represents deferred license revenue where payments have been received in advance of revenue recognition.

Stock-based Compensation

Stock-based Compensation	9 Months Ended
	Sep. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-based Compensation	STOCK-BASED COMPENSATION Stock Options and Awards The Company’s equity incentive program is a long-term retention program that is intended to attract, retain, and provide incentives for talented employees, consultants, officers, and directors and to align stockholder and employee interests. The Company may grant time based options, market condition based options, stock appreciation rights, restricted stock, restricted stock units (“RSUs”), performance shares, performance units, and other stock-based or cash-based awards to employees, officers, directors, and consultants. Under this program, stock options may be granted at prices not less than the fair market value on the date of grant for stock options. These options generally vest over four years and expire from five to ten years from the date of grant. In addition to time based vesting, market condition based options are subject to a market condition: the closing price of the Company stock must exceed a certain level for a number of trading days within a specified timeframe or the options will be cancelled before the expiration of the options. Restricted stock generally vests over one year. RSUs generally vest over three years. Awards granted other than an option or stock appreciation right reduce the common stock shares available for grant under the program by 1.75 shares for each share issued. September 30, 2015 Common stock shares available for grant 1,332,298 Common stock options outstanding 3,804,069 Restricted stock awards outstanding 21,356 Restricted stock units outstanding 516,956 Employee Stock Purchase Plan The Company has an Employee Stock Purchase Plan (“ESPP”). Under the ESPP, eligible employees may purchase common stock through payroll deductions at a purchase price of 85% of the lower of the fair market value of the Company’s stock at the beginning of the offering period or the purchase date. Participants may not purchase more than 2,000 shares in a six -month offering period or purchase stock having a value greater than $25,000 in any calendar year as measured at the beginning of the offering period. A total of 1,000,000 shares of common stock have been reserved for issuance under the ESPP. As of September 30, 2015 , 603,558 shares had been purchased since the inception of the ESPP in 1999. Under ASC 718-10, the ESPP is considered a compensatory plan and the Company is required to recognize compensation cost related to the fair value of the award purchased under the ESPP. Shares purchased under the ESPP for the nine months ended September 30, 2015 are listed below. Shares purchased under the ESPP for the nine months ended September 30, 2014 are 38,298 . The intrinsic value listed below is calculated as the difference between the market value on the date of purchase and the purchase price of the shares. Nine Months Ended September 30, 2015 Shares purchased under ESPP 45,820 Average price of shares purchased under ESPP $ 8.00 Intrinsic value of shares purchased under ESPP $ 160,000 Summary of Standard Stock Options The following table sets forth the summary of activity with respect to standard stock options granted under the Company’s stock option plans for the nine months ended September 30, 2015 and year ended December 31, 2014 : Nine Months Ended September 30, 2015 Year Ended December 31, 2014 Beginning outstanding balance 3,486,157 3,227,167 Granted 491,520 604,620 Exercised (214,466 ) (205,744 ) Forfeited (109,222 ) (102,454 ) Expired (49,920 ) (37,432 ) Ending outstanding balance 3,604,069 3,486,157 Aggregate intrinsic value of options exercised $ 1,045,000 $ 1,125,000 Weighted average fair value of options granted 4.50 4.93 The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying awards and the quoted price of the Company’s common stock for the options that were in-the-money. Information regarding these standard stock options outstanding at September 30, 2015 and December 31, 2014 is summarized below: Number of Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Life (years) Aggregate Intrinsic Value (In millions) December 31, 2014 Options outstanding 3,486,157 $ 8.30 4.85 $ 6.6 Options vested and expected to vest using estimated forfeiture rates 3,319,308 8.21 4.80 6.6 Options exercisable 2,023,024 7.18 4.26 6.0 September 30, 2015 Options outstanding 3,604,069 $ 8.42 4.43 $ 11.4 Options vested and expected to vest using estimated forfeiture rates 3,437,670 8.33 4.35 11.1 Options exercisable 2,164,658 7.53 3.68 8.9 Summary of Market Condition Based Stock Options The following table sets forth activity with respect to market condition based stock options granted under the Company’s stock option plans for the nine months ended September 30, 2015 and year ended December 31, 2014 : Nine Months Ended September 30, 2015 Year Ended December 31, 2014 Beginning outstanding balance 50,000 — Granted 150,000 50,000 Exercised — — Forfeited and cancelled — — Ending outstanding balance 200,000 50,000 Aggregate intrinsic value of options exercised $ — $ — Weighted average fair value of options granted 3.64 5.71 The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying awards and the quoted price of the Company’s common stock for the options that were in-the-money. Information regarding these market condition based stock options outstanding at September 30, 2015 and December 31, 2014 is summarized below: Number of Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Life (years) Aggregate Intrinsic Value (In millions) December 31, 2014 Options outstanding 50,000 $ 11.94 6.15 $ — Options vested and expected to vest using estimated forfeiture rates 45,430 11.94 6.15 — Options exercisable — — — — September 30, 2015 Options outstanding 200,000 $ 9.05 6.17 $ 0.5 Options vested and expected to vest using estimated forfeiture rates 180,300 9.12 6.15 0.4 Options exercisable — — — — Summary of Restricted Stock Units RSU activity for the nine months ended September 30, 2015 and year ended December 31, 2014 was as follows: Nine Months Ended September 30, 2015 Year Ended December 31, 2014 Beginning outstanding balance 564,891 668,056 Awarded 281,290 265,630 Released (273,944 ) (317,970 ) Forfeited (55,281 ) (50,825 ) Ending outstanding balance 516,956 564,891 Weighted average grant date fair value of RSUs granted $ 8.16 $ 11.35 Total fair value of RSUs released 2,338,000 3,491,000 Information regarding RSUs outstanding at September 30, 2015 and December 31, 2014 is summarized below: Number of Shares Weighted Average Remaining Contractual Life (years) Aggregate Intrinsic Value (In millions) December 31, 2014 RSUs outstanding 564,891 0.84 $ 5.3 RSUs vested and expected to vest using estimated forfeiture rates 502,411 0.80 4.8 September 30, 2015 RSUs outstanding 516,956 1.10 $ 5.8 RSUs vested and expected to vest using estimated forfeiture rates 425,164 1.06 4.8 Summary of Restricted Stock Awards Restricted stock award activity for the nine months ended September 30, 2015 and year ended December 31, 2014 was as follows: Nine Months Ended September 30, 2015 Year Ended December 31, 2014 Beginning outstanding balance 35,364 44,000 Awarded 21,356 35,364 Released (35,364 ) (44,000 ) Forfeited — — Ending outstanding balance 21,356 35,364 Weighted average grant date fair value of restricted stock awarded $ 12.26 $ 10.97 Total fair value of restricted stock awards released 434,000 483,000 Stock Plan Assumptions The assumptions used to value option grants under the Company’s stock plans were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Standard Stock Options Expected life (in years) 4.6 4.7 4.7 4.7 Volatility 56 % 57 % 56 % 57 % Interest rate 1.5 % 1.5 % 1.4 % 1.4 % Dividend yield N/A N/A N/A N/A Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Market Condition Based Stock Options Expected life (in years) N/A N/A 7.0 7.0 Volatility N/A N/A 65 % 66 % Interest rate N/A N/A 1.9 % 2.2 % Dividend yield N/A N/A N/A N/A Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Employee Stock Purchase Plan Expected life (in years) 0.5 0.5 0.5 0.5 Volatility 53 % 46 % 48 % 43 % Interest rate 0.2 % 0.1 % 0.1 % 0.1 % Dividend yield N/A N/A N/A N/A Compensation Costs Total stock-based compensation recognized in the condensed consolidated statements of income and comprehensive income is as follows: Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 (In thousands) (In thousands) Statement of Income Classifications Sales and marketing $ 302 $ 230 $ 853 $ 784 Research and development 276 265 1,036 1,008 General and administrative 698 636 2,356 2,266 Total $ 1,276 $ 1,131 $ 4,245 $ 4,058 As of September 30, 2015 , there was $7.8 million related to stock options, restricted stock awards, and RSUs of unrecognized compensation cost, adjusted for estimated forfeitures, granted to the Company’s employees and directors. This cost will be recognized over an estimated weighted-average period of approximately 2.64 years for standard options, 3.17 years for market condition based options, 1.83 years for RSUs, and 0.68 years for restricted stock awards. Total unrecognized compensation cost will be adjusted for future changes in estimated forfeitures.

Stockholders' Equity

Stockholders' Equity	9 Months Ended
	Sep. 30, 2015
Equity [Abstract]
Stockholders' Equity	STOCKHOLDERS’ EQUITY Accumulated Other Comprehensive Income The changes in accumulated other comprehensive income are included in the table below. Nine Months Ended September 30, 2015 Unrealized Gains and Losses on Available-for Sale Securities Foreign Currency Items Total (In thousands) Beginning balance $ 1 $ 101 $ 102 Other comprehensive income before reclassifications 9 — 9 Amounts reclassified from accumulated other comprehensive income — — — Net current period other comprehensive income 9 — 9 Ending Balance $ 10 $ 101 $ 111 Stock Repurchase Program On November 1, 2007, the Company announced its Board of Directors’ authorized the repurchase of up to $50 million of the Company’s common stock (“Stock Repurchase Program”). In addition, on October 22, 2014, our board of directors authorized another $30 million under the share repurchase program. The Company may repurchase its stock for cash in the open market in accordance with applicable securities laws. The timing of and amount of any stock repurchase will depend on share price, corporate and regulatory requirements, economic and market conditions, and other factors. The stock repurchase authorization has no expiration date, does not require the Company to repurchase a specific number of shares, and may be modified, suspended, or discontinued at any time. There were no stock repurchases during the three months and nine months ended September 30, 2015 . During the three months and nine months ended September 30, 2014 , the Company repurchased 534,849 and 1,151,143 shares for $5.0 million and $12.0 million at an average cost of $9.36 and $10.42 , respectively, net of transaction costs, through open market repurchases. These amounts are classified as treasury stock on the Company’s condensed consolidated balance sheet. As of September 30, 2015 , the program remains available with approximately $34.4 million that may yet be purchased under it.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2015
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES Income tax provisions consisted of the following: Three Months Ended Nine Months Ended 2015 2014 2015 2014 (In thousands) (In thousands) Income before provision for income taxes $ 1,199 $ 1,672 $ 3,367 $ 4,880 Provision for income taxes (1,015 ) (599 ) (1,647 ) (1,774 ) Effective tax rate 84.7 % 35.8 % 48.9 % 36.4 % The provision for income tax for the three months ended September 30, 2015 and 2014 resulted primarily from the Company’s federal and foreign tax recognized at statutory rates, adjusted for the tax impact of nondeductible permanent items including stock-based compensation and foreign withholding taxes. The provision for income tax for the three months ended September 30, 2015 also includes non-cash tax expense on intercompany profit that resulted from the sale of certain IP rights to one of the Company's foreign subsidiaries as part of the Company's reoganization of its international operations during the period. Discrete items recognized for the three months ended September 30, 2015 include an increase to the valuation allowance for certain of the Company's deferred tax assets. On July 27, 2015, a U.S. Tax Court opinion (Altera Corporation et. al v. Commissioner) concerning the treatment of stock-based compensation expense in an intercompany cost sharing arrangement was issued. In its opinion, the U.S. Tax Court accepted Altera's position of excluding stock-based compensation from its intercompany cost sharing arrangement. Based on the findings of the U.S. Tax Court, the Company has concluded that it is more likely than not that the IRS will uphold the U.S. Tax Court ruling and accordingly has excluded stock-based compensation from intercompany charges during the period. The Company will continue to monitor ongoing developments and potential impacts to its condensed consolidated financial statements. As of September 30, 2015 , the Company had unrecognized tax benefits under ASC 740 “Income Taxes”, of approximately $5.9 million including interest of $80,000 . The total amount of unrecognized tax benefits that would affect the Company’s effective tax rate, if recognized, was $2.1 million . The Company expects to release reserves and record an immaterial tax benefit due to the expiration of applicable statutes of limitations during the next 12 months. The Company’s policy is to account for interest and penalties related to uncertain tax positions as a component of income tax provision. Net deferred income taxes were $24.4 million as of September 30, 2015 , consisting primarily of federal net operating loss carryforwards and timing differences between book and tax. Because the Company had net operating loss and credit carryforwards, there are open statutes of limitations in which federal, state, and foreign taxing authorities may examine the Company’s tax returns for all years from 1998 through the current period. The Company maintains a valuation allowance of $8.0 million against certain of its deferred tax assets, including federal, state, and certain foreign deferred tax assets. The Company has determined there is not sufficient evidence to support the release of the valuation allowance against these federal, state and foreign deferred tax assets.

Net Income Per Share

Net Income Per Share	9 Months Ended
	Sep. 30, 2015
Earnings Per Share [Abstract]
Net Income Per Share	NET INCOME PER SHARE Basic net income per share is computed using the weighted average number of common shares outstanding for the period, excluding unvested restricted stock and RSUs. Diluted net income per share is based upon the weighted average common shares outstanding for the period plus dilutive potential shares including unvested restricted stock, RSUs, and stock options using the treasury stock method. The following is a reconciliation of the numerators and denominators used in computing basic and diluted net income per share: Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 (in thousands except per share amounts) (in thousands except per share amounts) Numerator: Net income $ 184 $ 1,073 $ 1,720 $ 3,106 Denominator: Shares used in computation of basic net income per share (weighted average common shares outstanding) 28,190 28,505 28,027 28,420 Dilutive potential common shares: Restricted Stock and RSUs 177 188 223 262 Stock options 767 658 643 673 Shares used in computation of diluted net income per share 29,134 29,351 28,893 29,355 Basic net income per share $ 0.01 $ 0.04 $ 0.06 $ 0.11 Diluted net income per share $ 0.01 $ 0.04 $ 0.06 $ 0.11 The Company includes the underlying market condition stock options in the calculation of diluted earnings per share if the performance condition has been satisfied as of the end of the reporting period and excludes such options if the performance condition has not been met. The Company has excluded the shares related to the market condition stock options from the calculations in all periods presented. For the three months and nine months ended September 30, 2015 , options to purchase approximately 917,000 and 1.8 million shares of common stock, respectively, with exercise prices greater than the average fair market value of the Company’s stock of $12.13 and $10.78 per share, respectively, were not included in the calculation because the effect would have been anti-dilutive. For the three months and nine months ended September 30, 2014 , options to purchase approximately 1.6 million and 1.5 million shares of common stock, respectively, with exercise prices greater than the average fair market value of the Company’s stock of $11.27 and $11.11 per share, respectively, were not included in the calculation because the effect would have been anti-dilutive.

Contingencies

Contingencies	9 Months Ended
	Sep. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Contingencies	CONTINGENCIES From time to time, the Company receives claims from third parties asserting that the Company’s technologies, or those of its licensees, infringe on the other parties’ IP rights. Management believes that these claims are without merit. Additionally, periodically, the Company is involved in routine legal matters and contractual disputes incidental to its normal operations. In management’s opinion, the resolution of such matters will not have a material adverse effect on the Company’s condensed consolidated financial condition, results of operations, or liquidity. In the normal course of business, the Company provides indemnifications of varying scope to customers against claims of IP infringement made by third parties arising from the use of the Company’s IP, technology, or products. Historically, costs related to these guarantees have not been significant, and the Company is unable to estimate the maximum potential impact of these guarantees on its future results of operations.

Significant Accounting Polici18

Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2015
Accounting Policies [Abstract]
Description of Business	Immersion Corporation (the “Company”) was incorporated in 1993 in California and reincorporated in Delaware in 1999. It is an intellectual property (“IP”) and software licensing company focused on the creation, design, development, and licensing of patented haptic innovations and software that allow people to use their sense of touch more fully when operating a wide variety of digital devices.
Principles of Consolidation and Basis of Presentation	The condensed consolidated financial statements include the accounts of Immersion Corporation and its wholly-owned subsidiaries: Immersion Canada Corporation; Immersion International, LLC; Immersion Medical, Inc.; Immersion Japan K.K.; Immersion Ltd.; Immersion Software Ireland Ltd.; Haptify, Inc.; Immersion (Shanghai) Science & Technology Company, Ltd.; and Immersion Technology International Ltd. All intercompany accounts, transactions, and balances have been eliminated in consolidation. The accompanying condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and with the instructions for Form 10-Q and Article 10 of Regulation S-X and, therefore, do not include all information and footnotes necessary for a complete presentation of the financial position, results of operations, and cash flows, in conformity with GAAP. These condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements included in the Company’s Annual Report on Form 10-K, for the fiscal year ended December 31, 2014 . In the opinion of management, all adjustments consisting of only normal and recurring items necessary for the fair presentation of the financial position and results of operations for the interim periods presented have been included. The results of operations for the three months and nine months ended September 30, 2015 are not necessarily indicative of the results to be expected for the full year.
Segment Information	The Company develops, licenses, and supports a wide range of software and IP that more fully engage users’ sense of touch when operating digital devices. The Company focuses on the following target application areas: mobility and consumer electronics, automotive, gaming, commercial and industrial, and medical. The Company’s chief operating decision maker (“CODM”) is the Chief Executive Officer. The CODM allocates resources to and assesses the performance of the Company using information about its financial results as one operating and reporting segment.
Revenue Recognition	The Company recognizes revenues in accordance with applicable accounting standards, including ASC 605-10-S99, “Revenue Recognition” (“ASC 605-10-S99”); ASC 605-25, “Multiple Element Arrangements” (“ASC 605-25”); and ASC 985-605, “Software-Revenue Recognition” (“ASC 985-605”). The Company derives its revenues from two principal sources: royalty and license fees, and development contract and service fees. As described below, management judgments, assumptions, and estimates must be made and used in connection with the revenue recognized in any accounting period. Material differences may result in the amount and timing of revenue for any period based on the judgments and estimates made by management. Specifically, in connection with each transaction, the Company must evaluate whether: (i) persuasive evidence of an arrangement exists, (ii) delivery has occurred, (iii) the fee is fixed or determinable, and (iv) collectibility is probable. The Company applies these criteria as discussed below. • Persuasive evidence of an arrangement exists . For a license arrangement, the Company requires a written contract, signed by both the customer and the Company. • Delivery has occurred . The Company delivers software to customers physically and also delivers software electronically. For electronic deliveries, delivery occurs when the Company provides the customer access codes or “keys” that allow the customer to take immediate possession of the software. • The fee is fixed or determinable . The Company’s arrangement fee is based on the use of standard payment terms, which are those that are generally extended to the majority of customers. For transactions involving extended payment terms, the Company deems these fees not to be fixed or determinable for revenue recognition purposes and revenue is deferred until the fees become due and payable. • Collectibility is probable. To recognize revenue, the Company must judge collectibility of fees, which is done on a customer-by-customer basis pursuant to the Company’s credit review policy. The Company typically sells to customers with whom there is a history of successful collection. For new customers, the Company evaluates the customer’s financial condition and ability to pay. If it is determined that collectibility is not probable based upon the credit review process or the customer’s payment history, revenue is recognized when payment is received. Royalty and license revenue — The Company licenses its patents and software to customers in a variety of industries such as mobility, gaming, automotive, and medical devices. Certain of these are variable fee arrangements where the royalties earned by the Company are based on unit or sales volumes of the respective licensees. The Company also enters into fixed license fee arrangements. The terms of the royalty agreements generally require licensees to give notification of royalties due to the Company within 30 – 45 days of the end of the quarter during which their related sales occur. As the Company is unable to reliably estimate the licensees’ sales in any given quarter to determine the royalties due to it, the Company recognizes royalty revenues based on royalties reported by licensees and when all revenue recognition criteria are met. Certain royalties are based upon customer shipments or revenues and could be subject to change and may result in out of period adjustments. The Company recognizes fixed license fee revenue for licenses when earned under the terms of the agreements, which is generally recognized on a straight-line basis over the expected term of the license. Development, services, and other revenue — Development, services, and other revenue are composed of engineering services (engineering services and/or development contracts), and in limited cases, post contract customer support (“PCS”). Engineering services revenues are recognized under the proportional performance accounting method based on physical completion of the work to be performed or completed performance method. A provision for losses on contracts is made, if necessary, in the period in which the loss becomes probable and can be reasonably estimated. Revisions in estimates are reflected in the period in which the conditions become known. To date, such losses have not been significant. Revenue from PCS is typically recognized over the period of the ongoing obligation, which is generally consistent with the contractual term. Multiple element arrangements — The Company enters into multiple element arrangements in which customers purchase time-based non-exclusive licenses that cannot be resold to others, which include a combination of software and/or IP licenses, engineering services, and in limited cases PCS. For arrangements that are software based and include software and engineering services, the services are generally not essential to the functionality of the software, and customers may purchase engineering services to facilitate the adoption of the Company’s technology, but they may also decide to use their own resources or appoint other engineering service organizations to perform these services. For arrangements that are in substance subscription arrangements, the entire arrangement fee is recognized ratably over the contract term, subject to any limitations related to extended payment terms. For arrangements involving upfront fees for services and royalties earned by the Company based on unit or sales volumes of the respective licensees, and the services are performed ratably over the arrangement or are front-end loaded, the upfront fees are recognized ratably over the contract term and royalties based on unit or sales volume are recognized when they become fixed and determinable. As the Company is unable to reliably estimate the licensees’ sales in any given quarter to determine the royalties due to it, the Company recognizes per unit or sales volume driven royalty revenues based on royalties reported by licensees and when all revenue recognition criteria are met.
Recent Accounting Pronouncements	In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2014-09 “Revenue from Contracts with Customers: Topic 606” (“ASU 2014-09”) which will supersede the current revenue recognition requirements in Topic 605, Revenue Recognition, and most industry-specific guidance. The core principle of ASU 2014-09 is 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. Further, the guidance requires improved disclosures to help users of financial statements better understand the nature, amount, timing, and uncertainty of revenue that is recognized. In August 2015, the FASB issued ASU No. 2015-14 “Revenue from Contracts with Customers: Deferral of the Effective Date”, which deferred the effective date of ASU 2014-09 for periods beginning after December 15, 2016 to December 15, 2017, with early adoption permitted but not earlier than the original effective date. Accordingly, ASU 2014-09 is effective for the Company in the first quarter of fiscal 2018. The standard permits companies to either apply the requirements retrospectively to all prior periods presented, or apply the requirements in the year of adoption through a cumulative adjustment, and the Company is in the process of determining the method of adoption and evaluating the impact on its consolidated financial statements.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2015
Fair Value Disclosures [Abstract]
Schedule of Financial Instruments Measured at Fair Value on Recurring Basis	December 31, 2014 Fair value measurements using Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total (In thousands) Assets: U.S. Treasury securities $ — $ 42,981 $ — $ 42,981 Money market accounts 11,524 — — 11,524 Total assets at fair value $ 11,524 $ 42,981 $ — $ 54,505 Financial instruments measured at fair value on a recurring basis as of September 30, 2015 and December 31, 2014 are classified based on the valuation technique in the table below: September 30, 2015 Fair value measurements using Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total (In thousands) Assets: U.S. Treasury securities $ — $ 33,990 $ — $ 33,990 Money market accounts 22,025 — — 22,025 Total assets at fair value $ 22,025 $ 33,990 $ — $ 56,015
Schedule of Short-Term Investments	Short-term Investments September 30, 2015 Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Fair Value (In thousands) U.S. Treasury securities $ 33,980 $ 10 $ — $ 33,990 Total $ 33,980 $ 10 $ — $ 33,990 December 31, 2014 Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Fair Value (In thousands) U.S. Treasury securities $ 42,980 $ 1 $ — $ 42,981 Total $ 42,980 $ 1 $ — $ 42,981

Accounts and Other Receivables

Accounts and Other Receivables (Tables)	9 Months Ended
	Sep. 30, 2015
Receivables [Abstract]
Schedule of Accounts and Other Receivables	September 30, 2015 December 31, 2014 (In thousands) Trade accounts receivable $ 856 $ 2,708 Receivables from vendors and other 647 313 Accounts and other receivables $ 1,503 $ 3,021

Property and Equipment (Tables)

Property and Equipment (Tables)	9 Months Ended
	Sep. 30, 2015
Property, Plant and Equipment [Abstract]
Schedule of Property and Equipment	September 30, 2015 December 31, 2014 (In thousands) Computer equipment and purchased software $ 3,537 $ 3,418 Machinery and equipment 916 688 Furniture and fixtures 1,361 852 Leasehold improvements 3,838 1,295 Total 9,652 6,253 Less accumulated depreciation (4,874 ) (5,046 ) Property and equipment, net $ 4,778 $ 1,207

Intangibles and Other Assets (T

Intangibles and Other Assets (Tables)	9 Months Ended
	Sep. 30, 2015
Intangibles And Other Assets [Abstract]
Schedule of Intangibles and Other Assets	September 30, 2015 December 31, 2014 (In thousands) Purchased patents and other purchased intangible assets $ 4,605 $ 4,605 Less: Accumulated amortization of purchased patents and other purchased intangibles (4,597 ) (4,579 ) Purchased patents and other purchased intangible assets, net 8 26 Other assets 261 265 Intangibles and other assets, net $ 269 $ 291
Schedule of Amortization of Intangibles	Amortization of intangibles was as follows: Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 (In thousands) (In thousands) Amortization of intangibles $ 3 $ 15 $ 18 $ 55
Schedule of Estimated Remaining Annual Amortization Expense for Purchased Patents	The table below includes estimated remaining annual amortization expense for purchased patents as of September 30, 2015 . Estimated Amortization Expense (In thousands) Remainder of 2015 $ 2 2016 6 Total $ 8

Other Current Liabilities (Tabl

Other Current Liabilities (Tables)	9 Months Ended
	Sep. 30, 2015
Other Liabilities, Current [Abstract]
Components of Other Current Liabilities	September 30, 2015 December 31, 2014 (In thousands) Accrued legal $ 651 $ 1,065 Accrued services 204 518 Income taxes payable 166 69 Other current liabilities 618 573 Total other current liabilities $ 1,639 $ 2,225

Long-term Deferred Revenue (Tab

Long-term Deferred Revenue (Tables)	9 Months Ended
	Sep. 30, 2015
Deferred Revenue Disclosure [Abstract]
Schedule of Long-term Deferred Revenue	Long-term deferred revenue consisted of the following: September 30, 2015 December 31, 2014 (In thousands) Deferred revenue for Sony Computer Entertainment $ 2,710 $ 7,051 Other deferred revenue 1,273 776 Long-term deferred revenue $ 3,983 $ 7,827

Stock-based Compensation (Table

Stock-based Compensation (Tables)	9 Months Ended
	Sep. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Stock Options and Awards	September 30, 2015 Common stock shares available for grant 1,332,298 Common stock options outstanding 3,804,069 Restricted stock awards outstanding 21,356 Restricted stock units outstanding 516,956
Schedule of Employee Stock Purchase Plan	The intrinsic value listed below is calculated as the difference between the market value on the date of purchase and the purchase price of the shares. Nine Months Ended September 30, 2015 Shares purchased under ESPP 45,820 Average price of shares purchased under ESPP $ 8.00 Intrinsic value of shares purchased under ESPP $ 160,000
Schedule of Standard and Market-based Stock Options Activity	The following table sets forth the summary of activity with respect to standard stock options granted under the Company’s stock option plans for the nine months ended September 30, 2015 and year ended December 31, 2014 : Nine Months Ended September 30, 2015 Year Ended December 31, 2014 Beginning outstanding balance 3,486,157 3,227,167 Granted 491,520 604,620 Exercised (214,466 ) (205,744 ) Forfeited (109,222 ) (102,454 ) Expired (49,920 ) (37,432 ) Ending outstanding balance 3,604,069 3,486,157 Aggregate intrinsic value of options exercised $ 1,045,000 $ 1,125,000 Weighted average fair value of options granted 4.50 4.93 The following table sets forth activity with respect to market condition based stock options granted under the Company’s stock option plans for the nine months ended September 30, 2015 and year ended December 31, 2014 : Nine Months Ended September 30, 2015 Year Ended December 31, 2014 Beginning outstanding balance 50,000 — Granted 150,000 50,000 Exercised — — Forfeited and cancelled — — Ending outstanding balance 200,000 50,000 Aggregate intrinsic value of options exercised $ — $ — Weighted average fair value of options granted 3.64 5.71
Schedule of Information Regarding Standard and Market Condition Based Stock Options Outstanding	Information regarding these standard stock options outstanding at September 30, 2015 and December 31, 2014 is summarized below: Number of Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Life (years) Aggregate Intrinsic Value (In millions) December 31, 2014 Options outstanding 3,486,157 $ 8.30 4.85 $ 6.6 Options vested and expected to vest using estimated forfeiture rates 3,319,308 8.21 4.80 6.6 Options exercisable 2,023,024 7.18 4.26 6.0 September 30, 2015 Options outstanding 3,604,069 $ 8.42 4.43 $ 11.4 Options vested and expected to vest using estimated forfeiture rates 3,437,670 8.33 4.35 11.1 Options exercisable 2,164,658 7.53 3.68 8.9 Information regarding these market condition based stock options outstanding at September 30, 2015 and December 31, 2014 is summarized below: Number of Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Life (years) Aggregate Intrinsic Value (In millions) December 31, 2014 Options outstanding 50,000 $ 11.94 6.15 $ — Options vested and expected to vest using estimated forfeiture rates 45,430 11.94 6.15 — Options exercisable — — — — September 30, 2015 Options outstanding 200,000 $ 9.05 6.17 $ 0.5 Options vested and expected to vest using estimated forfeiture rates 180,300 9.12 6.15 0.4 Options exercisable — — — —
Schedule of Restricted Stock Units Activity	RSU activity for the nine months ended September 30, 2015 and year ended December 31, 2014 was as follows: Nine Months Ended September 30, 2015 Year Ended December 31, 2014 Beginning outstanding balance 564,891 668,056 Awarded 281,290 265,630 Released (273,944 ) (317,970 ) Forfeited (55,281 ) (50,825 ) Ending outstanding balance 516,956 564,891 Weighted average grant date fair value of RSUs granted $ 8.16 $ 11.35 Total fair value of RSUs released 2,338,000 3,491,000
Schedule of Information Regarding Restricted Stock Units Outstanding	Information regarding RSUs outstanding at September 30, 2015 and December 31, 2014 is summarized below: Number of Shares Weighted Average Remaining Contractual Life (years) Aggregate Intrinsic Value (In millions) December 31, 2014 RSUs outstanding 564,891 0.84 $ 5.3 RSUs vested and expected to vest using estimated forfeiture rates 502,411 0.80 4.8 September 30, 2015 RSUs outstanding 516,956 1.10 $ 5.8 RSUs vested and expected to vest using estimated forfeiture rates 425,164 1.06 4.8
Schedule of Restricted Stock Awards Activity	Restricted stock award activity for the nine months ended September 30, 2015 and year ended December 31, 2014 was as follows: Nine Months Ended September 30, 2015 Year Ended December 31, 2014 Beginning outstanding balance 35,364 44,000 Awarded 21,356 35,364 Released (35,364 ) (44,000 ) Forfeited — — Ending outstanding balance 21,356 35,364 Weighted average grant date fair value of restricted stock awarded $ 12.26 $ 10.97 Total fair value of restricted stock awards released 434,000 483,000
Schedule of Stock Options, Market Condition Based Stock Options and Employee Stock Purchase Plan, Valuation Assumptions	The assumptions used to value option grants under the Company’s stock plans were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Standard Stock Options Expected life (in years) 4.6 4.7 4.7 4.7 Volatility 56 % 57 % 56 % 57 % Interest rate 1.5 % 1.5 % 1.4 % 1.4 % Dividend yield N/A N/A N/A N/A Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Market Condition Based Stock Options Expected life (in years) N/A N/A 7.0 7.0 Volatility N/A N/A 65 % 66 % Interest rate N/A N/A 1.9 % 2.2 % Dividend yield N/A N/A N/A N/A Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Employee Stock Purchase Plan Expected life (in years) 0.5 0.5 0.5 0.5 Volatility 53 % 46 % 48 % 43 % Interest rate 0.2 % 0.1 % 0.1 % 0.1 % Dividend yield N/A N/A N/A N/A
Schedule of Stock-Based Compensation	Total stock-based compensation recognized in the condensed consolidated statements of income and comprehensive income is as follows: Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 (In thousands) (In thousands) Statement of Income Classifications Sales and marketing $ 302 $ 230 $ 853 $ 784 Research and development 276 265 1,036 1,008 General and administrative 698 636 2,356 2,266 Total $ 1,276 $ 1,131 $ 4,245 $ 4,058

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	9 Months Ended
	Sep. 30, 2015
Equity [Abstract]
Changes in Accumulated Other Comprehensive Income (Loss)	The changes in accumulated other comprehensive income are included in the table below. Nine Months Ended September 30, 2015 Unrealized Gains and Losses on Available-for Sale Securities Foreign Currency Items Total (In thousands) Beginning balance $ 1 $ 101 $ 102 Other comprehensive income before reclassifications 9 — 9 Amounts reclassified from accumulated other comprehensive income — — — Net current period other comprehensive income 9 — 9 Ending Balance $ 10 $ 101 $ 111

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
	Sep. 30, 2015
Income Tax Disclosure [Abstract]
Schedule of Income Tax Provisions	Income tax provisions consisted of the following: Three Months Ended Nine Months Ended 2015 2014 2015 2014 (In thousands) (In thousands) Income before provision for income taxes $ 1,199 $ 1,672 $ 3,367 $ 4,880 Provision for income taxes (1,015 ) (599 ) (1,647 ) (1,774 ) Effective tax rate 84.7 % 35.8 % 48.9 % 36.4 %

Net Income Per Share (Tables)

Net Income Per Share (Tables)	9 Months Ended
	Sep. 30, 2015
Earnings Per Share [Abstract]
Reconciliation used in Computing Basic and Diluted Net Income (Loss) per Share	The following is a reconciliation of the numerators and denominators used in computing basic and diluted net income per share: Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 (in thousands except per share amounts) (in thousands except per share amounts) Numerator: Net income $ 184 $ 1,073 $ 1,720 $ 3,106 Denominator: Shares used in computation of basic net income per share (weighted average common shares outstanding) 28,190 28,505 28,027 28,420 Dilutive potential common shares: Restricted Stock and RSUs 177 188 223 262 Stock options 767 658 643 673 Shares used in computation of diluted net income per share 29,134 29,351 28,893 29,355 Basic net income per share $ 0.01 $ 0.04 $ 0.06 $ 0.11 Diluted net income per share $ 0.01 $ 0.04 $ 0.06 $ 0.11

Significant Accounting Polici29

Significant Accounting Policies - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2015Segment
Accounting Policies [Abstract]
Number of operating and reporting segments	1
Period of royalties notification, minimum	30 days
Period of royalties notification, maximum	45 days

Fair Value Measurements - Sched

Fair Value Measurements - Schedule of Financial Instruments Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	$ 56,015	$ 54,505
Short-term Investments | U.S. Treasury Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	33,990	42,981
Cash and Cash Equivalents | Money Market Accounts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	22,025	11,524
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	22,025	11,524
Quoted Prices in Active Markets for Identical Assets (Level 1) | Short-term Investments | U.S. Treasury Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Cash and Cash Equivalents | Money Market Accounts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	22,025	11,524
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	33,990	42,981
Significant Other Observable Inputs (Level 2) | Short-term Investments | U.S. Treasury Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	33,990	42,981
Significant Other Observable Inputs (Level 2) | Cash and Cash Equivalents | Money Market Accounts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	0	0
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	0	0
Significant Unobservable Inputs (Level 3) | Short-term Investments | U.S. Treasury Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	0	0
Significant Unobservable Inputs (Level 3) | Cash and Cash Equivalents | Money Market Accounts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	$ 0	$ 0

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Detail) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Cash held in banks	$ 11,100,000	$ 2,900,000
Period for contractual maturities of the Company's available-for-sale securities	1 year	1 year
Fair value assets, Level 1 to Level 2	$ 0	$ 0
Fair value assets, Level 2 to Level 1	0	0
Fair value liabilities, Level 1 to Level 2	0	0
Fair value liabilities, Level 2 to Level 1	$ 0	$ 0

Fair Value Measurements - Sch32

Fair Value Measurements - Schedule of Short-Term Investments (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Short-term Investments, Amortized Cost	$ 33,980	$ 42,980
Short-term Investments, Gross Unrealized Holding Gains	10	1
Short-term Investments, Gross Unrealized Holding Losses	0	0
Short-term Investments, Fair Value	33,990	42,981
U.S. Treasury Securities
Schedule of Available-for-sale Securities [Line Items]
Short-term Investments, Amortized Cost	33,980	42,980
Short-term Investments, Gross Unrealized Holding Gains	10	1
Short-term Investments, Gross Unrealized Holding Losses	0	0
Short-term Investments, Fair Value	$ 33,990	$ 42,981

Accounts and Other Receivable33

Accounts and Other Receivables - Schedule of Accounts and Other Receivables (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Receivables [Abstract]
Trade accounts receivable	$ 856	$ 2,708
Receivables from vendors and other	647	313
Accounts and other receivables	$ 1,503	$ 3,021

Property and Equipment - Schedu

Property and Equipment - Schedule of Property and Equipment (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property and Equipment, Total	$ 9,652	$ 6,253
Less accumulated depreciation	(4,874)	(5,046)
Property and equipment, net	4,778	1,207
Computer Equipment And Purchased Software
Property, Plant and Equipment [Line Items]
Property and Equipment, Total	3,537	3,418
Machinery and Equipment
Property, Plant and Equipment [Line Items]
Property and Equipment, Total	916	688
Furniture and Fixtures
Property, Plant and Equipment [Line Items]
Property and Equipment, Total	1,361	852
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Property and Equipment, Total	$ 3,838	$ 1,295

Intangibles and Other Assets -

Intangibles and Other Assets - Schedule of Intangibles and Other Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Purchased patents and other purchased intangible assets, net	$ 8
Other assets	261	$ 265
Intangibles and other assets, net	269	291
Purchased Patents and Other Purchased Intangibles
Finite-Lived Intangible Assets [Line Items]
Purchased patents and other purchased intangible assets	4,605	4,605
Less: Accumulated amortization of purchased patents and other purchased intangibles	(4,597)	(4,579)
Purchased patents and other purchased intangible assets, net	$ 8	$ 26

Intangibles and Other Assets 36

Intangibles and Other Assets - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2015
Intangibles And Other Assets [Abstract]
Patents, estimated useful lives	10 years

Intangibles and Other Assets 37

Intangibles and Other Assets - Schedule of Amortization of Intangibles (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Intangibles And Other Assets [Abstract]
Amortization of intangibles	$ 3	$ 15	$ 18	$ 55

Intangibles and Other Assets 38

Intangibles and Other Assets - Schedule of Estimated Remaining Annual Amortization Expense for Purchased Patents (Detail) $ in Thousands	Sep. 30, 2015USD ($)
Intangibles And Other Assets [Abstract]
Remainder of 2015	$ 2
2,016	6
Purchased patents and other purchased intangible assets, net	$ 8

Other Current Liabilities (Deta

Other Current Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Other Liabilities, Current [Abstract]
Accrued legal	$ 651	$ 1,065
Accrued services	204	518
Income taxes payable	166	69
Other current liabilities	618	573
Total other current liabilities	$ 1,639	$ 2,225

Long-term Deferred Revenue - Sc

Long-term Deferred Revenue - Schedule of Long-term Deferred Revenue (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Deferred Revenue Disclosure [Abstract]
Deferred revenue for Sony Computer Entertainment	$ 2,710	$ 7,051
Other deferred revenue	1,273	776
Long-term deferred revenue	$ 3,983	$ 7,827

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options for every share issued	1.75
Percentage of fair market value on the purchase date	85.00%
Maximum number of shares per employee	2,000
Employee stock purchase plan offering period	6 months
Maximum value of shares per employee	$ 25,000
Common stock reserved for issuance	1,000,000
Shares purchased by employee since inception of ESPP	603,558
Shares purchased under ESPP	45,820	38,298
Unrecognized compensation cost	$ 7,800,000
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based payment award vesting period (years)	4 years
Stock Options | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based payment award expiration period (years)	5 years
Stock Options | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based payment award expiration period (years)	10 years
Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based payment award vesting period (years)	1 year
Unrecognized compensation cost, recognized over an estimated weighted-average period (years)	8 months 4 days
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based payment award vesting period (years)	3 years
Unrecognized compensation cost, recognized over an estimated weighted-average period (years)	1 year 9 months 29 days
Standard Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost, recognized over an estimated weighted-average period (years)	2 years 7 months 20 days
Market Condition Based Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost, recognized over an estimated weighted-average period (years)	3 years 2 months 1 day

Stock-Based Compensation - Sche

Stock-Based Compensation - Schedule of Stock Options and Awards (Detail) - shares	Sep. 30, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock shares available for grant	1,332,298
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock options outstanding (in shares)	3,804,069
Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock awards and units outstanding	21,356	35,364	44,000
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock awards and units outstanding	516,956	564,891	668,056

Stock-Based Compensation - Sc43

Stock-Based Compensation - Schedule of Employee Stock Purchase Plan (Detail) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Shares purchased under ESPP	45,820	38,298
Average price of shares purchased under ESPP (in dollars per share)	$ 8
Intrinsic value of shares purchased under ESPP	$ 160

Stock-Based Compensation - Sc44

Stock-Based Compensation - Schedule of Standard and Market-based Stock Options Activity (Detail) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Standard Stock Options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]
Beginning outstanding balance	3,486,157	3,227,167
Granted	491,520	604,620
Exercised	(214,466)	(205,744)
Forfeited	(109,222)	(102,454)
Expired	(49,920)	(37,432)
Ending outstanding balance	3,604,069	3,486,157
Aggregate intrinsic value of options exercised (in dollars)	$ 1,045,000	$ 1,125,000
Weighted average fair value of options granted (in dollars per share)	$ 4.50	$ 4.93
Market Condition Based Stock Options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]
Beginning outstanding balance	50,000	0
Granted	150,000	50,000
Exercised	0	0
Forfeited and cancelled	0	0
Ending outstanding balance	200,000	50,000
Aggregate intrinsic value of options exercised (in dollars)	$ 0	$ 0
Weighted average fair value of options granted (in dollars per share)	$ 3.64	$ 5.71

Stock-Based Compensation - Sc45

Stock-Based Compensation - Schedule of Information Regarding Standard and Market Condition Based Stock Options Outstanding (Detail) - USD ($) $ / shares in Units, $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014	Dec. 31, 2013
Standard Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock options outstanding (in shares)	3,604,069	3,486,157	3,227,167
Options vested and expected to vest using estimated forfeiture rates, number (in shares)	3,437,670	3,319,308
Options exercisable, number (in shares)	2,164,658	2,023,024
Options outstanding, Weighted Average Exercise Price (in dollars per share)	$ 8.42	$ 8.30
Options vested and expected to vest using estimated forfeiture rates, Weighted Average Exercise Price (in dollars per share)	8.33	8.21
Options exercisable, Weighted Average Exercise Price (in dollars per share)	$ 7.53	$ 7.18
Options outstanding, Weighted Average Remaining Contractual Life (years)	4 years 5 months 4 days	4 years 10 months 6 days
Options vested and expected to vest using estimated forfeiture rates, Weighted Average Remaining Contractual Life (years)	4 years 4 months 6 days	4 years 9 months 18 days
Options exercisable, weighted average remaining contractual (years)	3 years 8 months 4 days	4 years 3 months 4 days
Options outstanding, aggregate intrinsic value	$ 11.4	$ 6.6
Options vested and expected to vest using estimated forfeiture rates, Aggregate Intrinsic Value	11.1	6.6
Options exercisable, aggregate intrinsic value	$ 8.9	$ 6
Market Condition Based Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock options outstanding (in shares)	200,000	50,000	0
Options vested and expected to vest using estimated forfeiture rates, number (in shares)	180,300	45,430
Options exercisable, number (in shares)	0	0
Options outstanding, Weighted Average Exercise Price (in dollars per share)	$ 9.05	$ 11.94
Options vested and expected to vest using estimated forfeiture rates, Weighted Average Exercise Price (in dollars per share)	9.12	11.94
Options exercisable, Weighted Average Exercise Price (in dollars per share)	$ 0	$ 0
Options outstanding, Weighted Average Remaining Contractual Life (years)	6 years 2 months 1 day	6 years 1 month 24 days
Options vested and expected to vest using estimated forfeiture rates, Weighted Average Remaining Contractual Life (years)	6 years 1 month 24 days	6 years 1 month 24 days
Options outstanding, aggregate intrinsic value	$ 0.5	$ 0
Options vested and expected to vest using estimated forfeiture rates, Aggregate Intrinsic Value	0.4	0
Options exercisable, aggregate intrinsic value	$ 0	$ 0

Stock-Based Compensation - Sc46

Stock-Based Compensation - Schedule of Restricted Stock Units Activity (Detail) - Restricted Stock Units - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Beginning outstanding balance	564,891	668,056
Awarded	281,290	265,630
Released	(273,944)	(317,970)
Forfeited	(55,281)	(50,825)
Ending outstanding balance	516,956	564,891
Weighted average grant date fair value of RSUs granted (in dollars per share)	$ 8.16	$ 11.35
Total fair value of RSUs released (in dollars)	$ 2,338	$ 3,491

Stock-Based Compensation - Sc47

Stock-Based Compensation - Schedule of Information Regarding Restricted Stock Units Outstanding (Detail) - Restricted Stock Units - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs outstanding, number (in shares)	516,956	564,891	668,056
RSUs vested and expected to vest using estimated forfeiture rates, number (in shares)	425,164	502,411
RSUs outstanding, Weighted Average Remaining Contractual Life (years)	1 year 1 month 6 days	10 months 2 days
RSUs vested and expected to vest using estimated forfeiture rates, Weighted Average Remaining Contractual Life (years)	1 year 21 days	9 months 18 days
RSUs outstanding, Aggregate Intrinsic Value	$ 5.8	$ 5.3
RSUs vested and expected to vest using estimated forfeiture rates, Aggregate Intrinsic Value	$ 4.8	$ 4.8

Stock-Based Compensation - Sc48

Stock-Based Compensation - Schedule of Restricted Stock Awards Activity (Detail) - Restricted Stock Awards - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Beginning outstanding balance	35,364	44,000
Awarded	21,356	35,364
Released	(35,364)	(44,000)
Forfeited	0	0
Ending outstanding balance	21,356	35,364
Weighted average grant date fair value of restricted stock awarded (in dollars per share)	$ 12.26	$ 10.97
Total fair value of restricted stock awards released (in dollars)	$ 434	$ 483

Stock-Based Compensation - Sc49

Stock-Based Compensation - Schedule of Stock Options, Market Condition Based Stock Options and Employee Stock Purchase Plan, Valuation Assumptions (Detail)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life (in years)	6 months	6 months	6 months	6 months
Volatility	53.00%	46.00%	48.00%	43.00%
Interest rate	0.20%	0.10%	0.10%	0.10%
Standard Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options exercisable, weighted average remaining contractual (years)			3 years 8 months 4 days		4 years 3 months 4 days
Expected life (in years)	4 years 7 months 6 days	4 years 8 months 12 days	4 years 8 months 12 days	4 years 8 months 12 days
Volatility	56.00%	57.00%	56.00%	57.00%
Interest rate	1.50%	1.50%	1.40%	1.40%
Market Condition Based Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life (in years)			7 years	7 years
Volatility			65.00%	66.00%
Interest rate			1.90%	2.20%

Stock-Based Compensation - Sc50

Stock-Based Compensation - Schedule of Stock-Based Compensation (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation, total	$ 1,276	$ 1,131	$ 4,245	$ 4,058
Sales and Marketing
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation, total	302	230	853	784
Research and Development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation, total	276	265	1,036	1,008
General and Administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation, total	$ 698	$ 636	$ 2,356	$ 2,266

Stockholders' Equity - Changes

Stockholders' Equity - Changes in Accumulated Other Comprehensive Income (Loss) (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2015USD ($)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Beginning balance	$ 102
Other comprehensive income before reclassifications	9
Amounts reclassified from accumulated other comprehensive income	0
Net current period other comprehensive income	9
Ending Balance	111
Unrealized Gains and Losses on Available-for Sale Securities
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Beginning balance	1
Other comprehensive income before reclassifications	9
Amounts reclassified from accumulated other comprehensive income	0
Net current period other comprehensive income	9
Ending Balance	10
Foreign Currency Items
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Beginning balance	101
Other comprehensive income before reclassifications	0
Amounts reclassified from accumulated other comprehensive income	0
Net current period other comprehensive income	0
Ending Balance	$ 101

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Oct. 22, 2014	Nov. 01, 2007
Equity [Abstract]
Stock repurchase program, additional authorized amount					$ 30,000,000	$ 50,000,000
Repurchased shares	0	534,849	0	1,151,143
Repurchased shares, value		$ 5,000,000		$ 12,000,000
Stock repurchase program, average cost		$ 9.36		$ 10.42
Stock repurchase program, remaining available repurchase amount	$ 34,400,000		$ 34,400,000

Income Taxes - Schedule of Inco

Income Taxes - Schedule of Income Tax Provisions (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Tax Disclosure [Abstract]
Income before provision for income taxes	$ 1,199	$ 1,672	$ 3,367	$ 4,880
Provision for income taxes	$ (1,015)	$ (599)	$ (1,647)	$ (1,774)
Effective tax rate	84.70%	35.80%	48.90%	36.40%

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) $ in Thousands	Sep. 30, 2015USD ($)
Income Taxes [Line Items]
Unrecognized tax benefits	$ 5,900
Unrecognized tax benefits, interest	80
Unrecognized tax benefits that would affect the Company's effective tax rate	2,100
Net deferred income taxes	24,400
State and Foreign
Income Taxes [Line Items]
Valuation allowance of deferred tax assets	$ 8,000

Net Income Per Share - Reconcil

Net Income Per Share - Reconciliation used in Computing Basic and Diluted Net Income per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Numerator:
Net income	$ 184	$ 1,073	$ 1,720	$ 3,106
Denominator:
Shares used in computation of basic net income per share (weighted average common shares outstanding)	28,190	28,505	28,027	28,420
Dilutive potential common shares: Restricted Stock and RSUs (in shares)	177	188	223	262
Dilutive potential common shares: Stock options (in shares)	767	658	643	673
Shares used in computation of diluted net income per share (in shares)	29,134	29,351	28,893	29,355
Basic net income per share (in dollars per share)	$ 0.01	$ 0.04	$ 0.06	$ 0.11
Diluted net income per share (in dollars per share)	$ 0.01	$ 0.04	$ 0.06	$ 0.11

Net Income Per Share - Addition

Net Income Per Share - Additional Information (Detail) - $ / shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Earnings Per Share [Abstract]
Options to purchase shares of common stock	917	1,600	1,800	1,500
Average fair market value of stock	$ 12.13	$ 11.27	$ 10.78	$ 11.11