Immersion (IMMR) 10-Q 1 May 15 2015 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2015	Apr. 23, 2015
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	FALSE
Document Period End Date	31-Mar-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Trading Symbol	IMMR
Entity Registrant Name	IMMERSION CORP
Entity Central Index Key	1058811
Current Fiscal Year End Date	-19
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		28,015,756

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Current assets:
Cash and cash equivalents	$40,355	$14,380
Short-term investments	37,987	42,981
Accounts and other receivables (net of allowances for doubtful accounts of $36 and $28)	1,902	3,021
Deferred income taxes	9,377	9,377
Prepaid expenses and other current assets	597	845
Total current assets	90,218	70,604
Property and equipment, net	2,581	1,207
Deferred income tax assets	25,557	25,419
Intangibles and other assets, net	278	291
Total assets	118,634	97,521
Current liabilities:
Accounts payable	1,670	669
Accrued compensation	2,621	1,906
Other current liabilities	3,778	2,225
Deferred revenue	25,082	7,779
Total current liabilities	33,151	12,579
Long-term deferred revenue	6,313	7,827
Other long-term liabilities	631	512
Total liabilities	40,095	20,918
Contingencies (Note 12)
Stockholders' equity:
Common stock and additional paid-in capital - $0.001 par value; 100,000,000 shares authorized; 34,521,521 and 34,225,778 shares issued, respectively; 28,011,130 and 27,715,387 shares outstanding, respectively	206,870	204,876
Accumulated other comprehensive income	103	102
Accumulated deficit	-82,865	-82,806
Treasury stock at cost: 6,510,391 shares	-45,569	-45,569
Total stockholders' equity	78,539	76,603
Total liabilities and stockholders' equity	$118,634	$97,521

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, except Share data, unless otherwise specified
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$36	$28
Common stock, par value	$0.00	$0.00
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	34,521,521	34,225,778
Common stock, shares outstanding	28,011,130	27,715,387
Treasury stock, shares	6,510,391	6,510,391

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Revenues:
Royalty and license	$16,012	$15,157
Development, services, and other	275	279
Total revenues	16,287	15,436
Costs and expenses:
Cost of revenues (exclusive of amortization of intangibles shown separately below)	115	120
Sales and marketing	4,210	2,763
Research and development	3,727	3,058
General and administrative	8,293	6,521
Amortization of intangibles	12	20
Total costs and expenses	16,357	12,482
Operating income (loss)	-70	2,954
Interest and other income (expense)	-25	-7
Income (loss) before benefit (provision) for income taxes	-95	2,947
Benefit (provision) for income taxes	36	-1,083
Net income (loss)	-59	1,864
Basic net income (loss) per share	$0	$0.07
Shares used in calculating basic net income (loss) per share	27,818	28,370
Diluted net income (loss) per share	$0	$0.06
Shares used in calculating diluted net income (loss) per share	27,818	29,382
Other Comprehensive Income (Loss)
Change in unrealized gains on short-term investments	1	1
Total Other Comprehensive Income (Loss)	1	1
Total Comprehensive Income (Loss)	($58)	$1,865

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Cash Flows (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Cash flows provided by operating activities:
Net income (loss)	($59)	$1,864
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization of property and equipment	314	107
Amortization of intangibles	12	20
Stock-based compensation	1,740	1,583
Allowance (recovery) for doubtful accounts	8	0
Changes in operating assets and liabilities:
Accounts and other receivables	1,111	-171
Deferred income taxes	-138	1,020
Prepaid expenses and other current assets	248	140
Other operating assets	-10	-16
Accounts payable	887	610
Accrued compensation and other current liabilities	1,477	-1,638
Deferred revenue	15,789	12,947
Other long-term liabilities	119	-27
Net cash provided by operating activities	21,498	16,439
Cash flows provided by (used in) investing activities:
Purchases of short-term investments	-4,994	-9,988
Proceeds from maturities of short-term investments	10,000	10,000
Purchases of property and equipment	-783	-325
Net cash provided by (used in) investing activities	4,223	-313
Cash flows provided by (used in) financing activities:
Issuance of common stock under employee stock purchase plan	190	176
Exercise of stock options	64	149
Purchases of treasury stock	0	-6,222
Net cash provided by (used in) financing activities	254	-5,897
Net increase (decrease) in cash and cash equivalents	25,975	10,229
Cash and cash equivalents:
Beginning of period	14,380	14,136
End of period	40,355	24,365
Supplemental disclosure of cash flow information
Cash paid for taxes	70	26
Supplemental disclosure of noncash operating, investing, and financing activities
Amounts accrued for property and equipment	965	15
Amounts accrued for purchase of treasury stock	0	660
Release of Restricted Stock Units and Awards under company stock plan	$2,184	$3,061

Significant_Accounting_Policie

Significant Accounting Policies	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
Significant Accounting Policies	1	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 Inc.; 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. 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 ended March 31, 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. ASU 2014-09 is effective for reporting periods beginning after December 15, 2016, and 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. The Company is required to adopt ASU 2014-09 as of January 1, 2017, and 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	3 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value Measurements	2	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 March 31, 2015 and December 31, 2014.
	Financial instruments measured at fair value on a recurring basis as of March 31, 2015 and December 31, 2014 are classified based on the valuation technique in the table below:
			March 31, 2015
			Fair value measurements using
			Quoted Prices in		Significant		Significant		Total
			Active Markets		Other		Unobservable
			for Identical		Observable		Inputs
			Assets		Inputs		(Level 3)
			(Level 1)		(Level 2)
			(In thousands)
	Assets:
	U.S. Treasury securities		$	0	$	37,987	$	0	$	37,987
	Money market accounts			24,523		0		0		24,523
	Total assets at fair value		$	24,523	$	37,987	$	0	$	62,510
	The above table excludes $15.8 million of cash held in banks.
			December 31, 2014
			Fair value measurements using
			Quoted Prices in		Significant		Significant		Total
			Active Markets		Other		Unobservable
			for Identical		Observable		Inputs
			Assets		Inputs		(Level 3)
			(Level 1)		(Level 2)
			(In thousands)
	Assets:
	U.S. Treasury securities		$	0	$	42,981	$	0	$	42,981
	Money market accounts			11,524		0		0		11,524
	Total assets at fair value		$	11,524	$	42,981	$	0	$	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
			March 31, 2015
			Amortized		Gross		Gross		Fair
			Cost		Unrealized		Unrealized		Value
					Holding		Holding
					Gains		Losses
			(In thousands)
	U.S. Treasury securities		$	37,985	$	2	$	0	$	37,987
	Total		$	37,985	$	2	$	0	$	37,987
			December 31, 2014
			Amortized		Gross		Gross		Fair
			Cost		Unrealized		Unrealized		Value
					Holding		Holding
					Gains		Losses
			(In thousands)
	U.S. Treasury securities		$	42,980	$	1	$	0	$	42,981
	Total		$	42,980	$	1	$	0	$	42,981
	The contractual maturities of the Company’s available-for-sale securities on March 31, 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 ended March 31, 2015 and the year ended December 31, 2014.

Accounts_and_Other_Receivables

Accounts and Other Receivables	3 Months Ended
	Mar. 31, 2015
Receivables [Abstract]
Accounts and Other Receivables	3	ACCOUNTS AND OTHER RECEIVABLES
			March 31,		December 31,
			2015		2014
			(In thousands)
	Trade accounts receivable		$	1,530	$	2,708
	Receivables from vendors and other			372		313
	Accounts and other receivables		$	1,902	$	3,021

Property_and_Equipment

Property and Equipment	3 Months Ended
	Mar. 31, 2015
Property, Plant and Equipment [Abstract]
Property and Equipment	4	PROPERTY AND EQUIPMENT
			March 31,			December 31,
			2015			2014
			(In thousands)
	Computer equipment and purchased software		$	3,487		$	3,418
	Machinery and equipment			865			688
	Furniture and fixtures			1,065			852
	Leasehold improvements			2,523			1,295
	Total			7,940			6,253
	Less accumulated depreciation			(5,359	)		(5,046	)
	Property and equipment, net		$	2,581		$	1,207

Intangibles_and_Other_Assets

Intangibles and Other Assets	3 Months Ended
	Mar. 31, 2015
Text Block [Abstract]
Intangibles and Other Assets	5	INTANGIBLES AND OTHER ASSETS
			March 31,			December 31,
			2015			2014
			(In thousands)
	Purchased patents and other purchased intangible assets		$	4,605		$	4,605
	Other assets			264			265
	Gross intangibles and other assets			4,869			4,870
	Accumulated amortization of purchased patents and other purchased intangibles			(4,591	)		(4,579	)
	Intangibles and other assets, net		$	278		$	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
			March 31,
			2015			2014
			(In thousands)
	Amortization of intangibles		$	12		$	20
	The table below includes estimated remaining annual amortization expense for purchased patents as of March 31, 2015.
			Estimated
			Amortization
			Expense
			(In thousands)
	Remainder of 2015		$	8
	2016			6
	Total		$	14

Components_of_Other_Current_Li

Components of Other Current Liabilities	3 Months Ended
	Mar. 31, 2015
Text Block [Abstract]
Components of Other Current Liabilities	6	COMPONENTS OF OTHER CURRENT LIABILITIES
			March 31,		December 31,
			2015		2014
			(In thousands)
	Accrued legal		$	1,992	$	1,065
	Accrued services			1,128		518
	Income taxes payable			47		69
	Other current liabilities			611		573
	Total other current liabilities		$	3,778	$	2,225

Longterm_Deferred_Revenue

Long-term Deferred Revenue	3 Months Ended
	Mar. 31, 2015
Deferred Revenue Disclosure [Abstract]
Long-term Deferred Revenue	7	LONG-TERM DEFERRED REVENUE
	Long-term deferred revenue consisted of the following:
			March 31,		December 31,
			2015		2014
			(In thousands)
	Deferred revenue for Sony Computer Entertainment		$	5,604	$	7,051
	Other deferred revenue			709		776
	Long-term deferred revenue		$	6,313	$	7,827
	Deferred revenue for Sony Computer Entertainment represents deferred license revenue where payments have been received in advance of revenue recognition.

Stockbased_Compensation

Stock-based Compensation	3 Months Ended
	Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-based Compensation	8	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.
			March 31,
			2015
	Common stock shares available for grant			1,440,213
	Common stock options outstanding			3,875,153
	Restricted stock awards outstanding			35,364
	Restricted stock units outstanding			565,148
	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 March 31, 2015, 581,451 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 three months ended March 31, 2015 are listed below. Shares purchased under the ESPP for the three months ended March 31, 2014 are 17,670. 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.
			Three Months
			Ended
			March 31,
			2015
	Shares purchased under ESPP			23,713
	Average price of shares purchased under ESPP		$	8
	Intrinsic value of shares purchased under ESPP		$	33,000
	Summary of Standard Stock Options
	The following table sets forth the summary of standard option activity under the Company’s stock option plans for the three months ended March 31, 2015 and year ended December 31, 2014:
			Three Months			Year
			Ended			Ended
			March 31,			December 31,
			2015			2014
	Beginning outstanding balance			3,486,157			3,227,167
	Granted			260,175			604,620
	Exercised			(10,862	)		(205,744	)
	Forfeited			(60,317	)		(102,454	)
	Expired			0			(37,432	)
	Ending outstanding balance			3,675,153			3,486,157
	Aggregate intrinsic value of options exercised		$	30,000		$	1,125,000
	Weighted average fair value of options granted			3.84			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 March 31, 2015 and December 31, 2014 is summarized below:
			Number of			Weighted			Weighted		Aggregate
			Shares			Average			Average		Intrinsic
						Exercise			Remaining		Value
						Price			Contractual		(In millions)
									Life (years)
	December 31, 2014
	Options outstanding			3,486,157		$	8.3			4.85	$	6.6
	Options vested and expected to vest using estimated forfeiture rates			3,319,308			8.21			4.8		6.6
	Options exercisable			2,023,024			7.18			4.26		6
	March 31, 2015
	Options outstanding			3,675,153		$	8.21			4.68	$	6.3
	Options vested and expected to vest using estimated forfeiture rates			3,529,945			8.16			4.62		6.2
	Options exercisable			2,270,159			7.5			4.02		5.6
	Summary of Market Condition Based Stock Options
	The following table sets forth the summary of the market-based option activity under the Company’s stock option plans for the three months ended March 31, 2015 and year ended December 31, 2014:
			Three Months			Year
			Ended			Ended
			March 31,			December 31,
			2015			2014
	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		$	0		$	0
	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 March 31, 2015 and December 31, 2014 is summarized below:
			Number of			Weighted			Weighted		Aggregate
			Shares			Average			Average		Intrinsic
			Exercise			Remaining			Value
			Price			Contractual			(In millions)
						Life (years)
December 31, 2014
Options outstanding			50,000		$	11.94			6.15	$	0
Options vested and expected to vestusing estimated forfeiture rates			45,430			11.94			6.15		0
Options exercisable			0			0			0		0
March 31, 2015
Options outstanding			200,000		$	9.05			6.67	$	0.2
Options vested and expected to vestusing estimated forfeiture rates			130,330			9.26			6.61		0.1
Options exercisable			0			0			0		0
Summary of Restricted Stock Units
RSU activity for the three months ended March 31, 2015 and year ended December 31, 2014 was as follows:
		Three Months			Year
		Ended			Ended
		March 31,			December 31,
		2015			2014
Beginning outstanding balance			564,891			668,056
Awarded			273,290			265,630
Released			(261,168	)		(317,970	)
Forfeited			(11,865	)		(50,825	)
Ending outstanding balance			565,148			564,891
Weighted average grant date fair value of RSUs granted		$	8.09		$	11.35
Total fair value of RSUs released			2,185,000			3,491,000
Information regarding RSUs outstanding at March 31, 2015 and December 31, 2014 is summarized below:
		Number of			Weighted			Aggregate
		Shares			Average			Intrinsic
					Remaining			Value
					Contractual			(In millions)
					Life (years)
December 31, 2014
RSUs outstanding			564,891			0.84		$	5.3
RSUs vested and expected to vestusing estimated forfeiture rates			502,411			0.8			4.8
March 31, 2015
RSUs outstanding			565,148			1.54		$	5.2
RSUs vested and expected to vestusing estimated forfeiture rates			437,437			1.48			4
Summary of Restricted Stock Awards
Restricted stock award activity for the three months ended March 31, 2015 and year ended December 31, 2014 was as follows:
		Three Months			Year
		Ended			Ended
		March 31,			December 31,
		2015			2014
Beginning outstanding balance			35,364			44,000
Awarded			0			35,364
Released			0			(44,000	)
Forfeited			0			0
Ending outstanding balance			35,364			35,364
Weighted average grant date fair value of restricted stock awarded		$	0		$	10.97
Total fair value of restricted stock awards released			0			483,000
Stock Plan Assumptions
The assumptions used to value option grants under the Company’s stock plans were as follows:
		Three Months Ended
		March 31,
		2015			2014
Standard Stock Options
Expected life (in years)			4.7			4.7
Volatility			56	%		57	%
Interest rate			1.4	%		1.4	%
Dividend yield			N/A			N/A
		Three Months Ended
		March 31,
		2015			2014
Market Condition Based Stock Options
Expected life (in years)			7			7
Volatility			65	%		66	%
Interest rate			1.9	%		2.2	%
Dividend yield			N/A			N/A
		Three Months Ended
		March 31,
		2015			2014
Employee Stock Purchase Plan
Expected life (in years)			0.5			0.5
Volatility			45	%		39	%
Interest rate			0.1	%		0.1	%
Dividend yield			N/A			N/A
Compensation Costs
Total stock-based compensation recognized in the condensed consolidated statements of operations and comprehensive income (loss) is as follows:
		Three Months Ended
		March 31,
		2015			2014
		(In thousands)
Statement of Operations Classifications
Sales and marketing		$	264		$	230
Research and development			496			475
General and administrative			980			878
Total		$	1,740		$	1,583
As of March 31, 2015, there was $9.2 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 2.98 years for standard options, 3.67 years for market condition based options, 2.23 years for RSUs, and 0.18 years for restricted stock awards. Total unrecognized compensation cost will be adjusted for future changes in estimated forfeitures.

Stockholders_Equity

Stockholders' Equity	3 Months Ended
	Mar. 31, 2015
Equity [Abstract]
Stockholders' Equity	9	STOCKHOLDERS’ EQUITY
	Comprehensive Income (Loss)
	The changes in accumulated other comprehensive income (loss) are included in the table below.
			Three Months Ended March 31, 2015
			Unrealized Gains		Foreign		Total
			and Losses on		Currency
			Available-for Sale		Items
			Securities
			(In thousands)
	Beginning balance		$	1	$	101	$	102
	Other comprehensive income (loss) before reclassifications			1		0		1
	Amounts reclassified from accumulated other comprehensive income (loss)			0		0		0
	Net current period other comprehensive income (loss)			1		0		1
	Ending Balance		$	2	$	101	$	103
	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 ended March 31, 2015. During the three months ended March 31, 2014, the Company repurchased 605,419 shares for $6.9 million at an average cost of $11.20, 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 March 31, 2015, the program remains available with approximately $34.4 million that may yet be purchased under it.

Income_Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Income Taxes	10	INCOME TAXES
	Income tax provisions consisted of the following:
			Three Months Ended
			March 31,
			2015			2014
			(In thousands)
	Income (loss) before provision for income taxes		$	(95	)	$	2,947
	Benefit (provision) for income taxes			36			(1,083	)
	Effective tax rate			37.9	%		36.7	%
	The benefit (provision) for income tax for the three months ended March 31, 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.
	As of March 31, 2015, the Company had unrecognized tax benefits under ASC 740 “Income Taxes”, of approximately $1.8 million including interest of $75,000. The total amount of unrecognized tax benefits that would affect the Company’s effective tax rate, if recognized, was $275,000. There were no material changes in the amount of unrecognized tax benefits during the three months ended March 31, 2015. The Company expects to release reserves and record a tax benefit due to the expiration of applicable statutes of limitations during the next twelve 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 $34.9 million as of March 31, 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 $7.5 million against certain of its deferred tax assets, including 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 state and foreign deferred tax assets.

Net_Income_Loss_Per_Share

Net Income (Loss) Per Share	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Net Income (Loss) Per Share	11	NET INCOME (LOSS) PER SHARE
	Basic net income (loss) 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 (loss) per share:
			Three Months Ended
			March 31,
			2015			2014
			(in thousands except
			per share amounts)
	Numerator:
	Net income (loss)		$	(59	)	$	1,864
	Denominator:
	Shares used in computation of basic net income (loss) per share (weighted average common shares outstanding)			27,818			28,370
	Dilutive potential common shares:
	Restricted Stock and RSUs			0			316
	Stock options			0			696
	Shares used in computation of diluted net income (loss) per share			27,818			29,382
	Basic net income (loss) per share		$	0		$	0.07
	Diluted net income (loss) per share		$	0		$	0.06
	As of March 31, 2015, the Company had securities outstanding that could potentially dilute basic earnings per share in the future, but these were excluded from the computation of diluted net loss per share for the three months ended March 31, 2015, since their effect would have been anti-dilutive. These outstanding securities consisted of the following:
			March 31,
			2015
	Outstanding stock options			3,875,153
	Unvested RSUs			565,148
	For the three months ended March 31, 2014, options to purchase approximately 1.4 million shares of common stock with exercise prices greater than the average fair market value of the Company’s stock of $11.21 per share were not included in the calculation because the effect would have been anti-dilutive.

Contingencies

Contingencies	3 Months Ended
	Mar. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Contingencies	12	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_Policie1

Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
Description of Business	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	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 Inc.; 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. 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 ended March 31, 2015 are not necessarily indicative of the results to be expected for the full year.
Segment Information	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	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	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. ASU 2014-09 is effective for reporting periods beginning after December 15, 2016, and 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. The Company is required to adopt ASU 2014-09 as of January 1, 2017, and 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)	3 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Schedule of Financial Instruments Measured at Fair Value on Recurring Basis	Financial instruments measured at fair value on a recurring basis as of March 31, 2015 and December 31, 2014 are classified based on the valuation technique in the table below:
		March 31, 2015
		Fair value measurements using
		Quoted Prices in		Significant		Significant		Total
		Active Markets		Other		Unobservable
		for Identical		Observable		Inputs
		Assets		Inputs		(Level 3)
		(Level 1)		(Level 2)
		(In thousands)
	Assets:
	U.S. Treasury securities	$	0	$	37,987	$	0	$	37,987
	Money market accounts		24,523		0		0		24,523
	Total assets at fair value	$	24,523	$	37,987	$	0	$	62,510
	The above table excludes $15.8 million of cash held in banks.
		December 31, 2014
		Fair value measurements using
		Quoted Prices in		Significant		Significant		Total
		Active Markets		Other		Unobservable
		for Identical		Observable		Inputs
		Assets		Inputs		(Level 3)
		(Level 1)		(Level 2)
		(In thousands)
	Assets:
	U.S. Treasury securities	$	0	$	42,981	$	0	$	42,981
	Money market accounts		11,524		0		0		11,524
	Total assets at fair value	$	11,524	$	42,981	$	0	$	54,505
	The above table excludes $2.9 million of cash held in banks.
Schedule of Short-Term Investments	Short-term Investments
		March 31, 2015
		Amortized		Gross		Gross		Fair Value
		Cost		Unrealized		Unrealized
				Holding		Holding
				Gains		Losses
		(In thousands)
	U.S. Treasury securities	$	37,985	$	2	$	0	$	37,987
	Total	$	37,985	$	2	$	0	$	37,987
		December 31, 2014
		Amortized		Gross		Gross		Fair Value
		Cost		Unrealized		Unrealized
				Holding		Holding
				Gains		Losses
		(In thousands)
	U.S. Treasury securities	$	42,980	$	1	$	0	$	42,981
	Total	$	42,980	$	1	$	0	$	42,981

Accounts_and_Other_Receivables1

Accounts and Other Receivables (Tables)	3 Months Ended
	Mar. 31, 2015
Receivables [Abstract]
Schedule of Accounts and Other Receivables
		March 31,		December 31,
		2015		2014
		(In thousands)
	Trade accounts receivable	$	1,530	$	2,708
	Receivables from vendors and other		372		313
	Accounts and other receivables	$	1,902	$	3,021

Property_and_Equipment_Tables

Property and Equipment (Tables)	3 Months Ended
	Mar. 31, 2015
Property, Plant and Equipment [Abstract]
Schedule of Property and Equipment
		March 31,			December 31,
		2015			2014
		(In thousands)
	Computer equipment and purchased software	$	3,487		$	3,418
	Machinery and equipment		865			688
	Furniture and fixtures		1,065			852
	Leasehold improvements		2,523			1,295
	Total		7,940			6,253
	Less accumulated depreciation		(5,359	)		(5,046	)
	Property and equipment, net	$	2,581		$	1,207

Intangibles_and_Other_Assets_T

Intangibles and Other Assets (Tables)	3 Months Ended
	Mar. 31, 2015
Text Block [Abstract]
Schedule of Intangibles and Other Assets
		March 31,			December 31,
		2015			2014
		(In thousands)
	Purchased patents and other purchased intangible assets	$	4,605		$	4,605
	Other assets		264			265
	Gross intangibles and other assets		4,869			4,870
	Accumulated amortization of purchased patents and other purchased intangibles		(4,591	)		(4,579	)
	Intangibles and other assets, net	$	278		$	291
Schedule of Amortization of Intangibles	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
		March 31,
		2015			2014
		(In thousands)
	Amortization of intangibles	$	12		$	20
Schedule of Estimated Remaining Annual Amortization Expense for Purchased Patents	The table below includes estimated remaining annual amortization expense for purchased patents as of March 31, 2015.
		Estimated
		Amortization
		Expense
		(In thousands)
	Remainder of 2015	$	8
	2016		6
	Total	$	14

Components_of_Other_Current_Li1

Components of Other Current Liabilities (Tables)	3 Months Ended
	Mar. 31, 2015
Text Block [Abstract]
Components of Other Current Liabilities
		March 31,		December 31,
		2015		2014
		(In thousands)
	Accrued legal	$	1,992	$	1,065
	Accrued services	$	1,128	$	518
	Income taxes payable		47		69
	Other current liabilities		611		573
	Total other current liabilities	$	3,778	$	2,225

Longterm_Deferred_Revenue_Tabl

Long-term Deferred Revenue (Tables)	3 Months Ended
	Mar. 31, 2015
Deferred Revenue Disclosure [Abstract]
Schedule of Long-term Deferred Revenue	Long-term deferred revenue consisted of the following:
		March 31,		December 31,
		2015		2014
		(In thousands)
	Deferred revenue for Sony Computer Entertainment	$	5,604	$	7,051
	Other deferred revenue		709		776
	Long-term deferred revenue	$	6,313	$	7,827

Stockbased_Compensation_Tables

Stock-based Compensation (Tables)	3 Months Ended
	Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Stock Options and Awards	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.
		March 31,
		2015
	Common stock shares available for grant		1,440,213
	Common stock options outstanding		3,875,153
	Restricted stock awards outstanding		35,364
	Restricted stock units outstanding		565,148
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.
		Three Months
		Ended
		March 31,
		2015
	Shares purchased under ESPP		23,713
	Average price of shares purchased under ESPP	$	8
	Intrinsic value of shares purchased under ESPP	$	33,000
Schedule of Standard and Market-based Stock Options Activity	The following table sets forth the summary of standard option activity under the Company’s stock option plans for the three months ended March 31, 2015 and year ended December 31, 2014:
		Three Months			Year
		Ended			Ended
		March 31,			December 31,
		2015			2014
	Beginning outstanding balance		3,486,157			3,227,167
	Granted		260,175			604,620
	Exercised		(10,862	)		(205,744	)
	Forfeited		(60,317	)		(102,454	)
	Expired		0			(37,432	)
	Ending outstanding balance		3,675,153			3,486,157
	Aggregate intrinsic value of options exercised	$	30,000		$	1,125,000
	Weighted average fair value of options granted		3.84			4.93
	The following table sets forth the summary of the market-based option activity under the Company’s stock option plans for the three months ended March 31, 2015 and year ended December 31, 2014:
		Three Months			Year
		Ended			Ended
		March 31,			December 31,
		2015			2014
	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	$	0		$	0
	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 March 31, 2015 and December 31, 2014 is summarized below:
		Number of			Weighted			Weighted		Aggregate
		Shares			Average			Average		Intrinsic
					Exercise			Remaining		Value
					Price			Contractual		(In millions)
								Life (years)
	December 31, 2014
	Options outstanding		3,486,157		$	8.3			4.85	$	6.6
	Options vested and expected to vest using estimated forfeiture rates		3,319,308			8.21			4.8		6.6
	Options exercisable		2,023,024			7.18			4.26		6
	March 31, 2015
	Options outstanding		3,675,153		$	8.21			4.68	$	6.3
	Options vested and expected to vest using estimated forfeiture rates		3,529,945			8.16			4.62		6.2
	Options exercisable		2,270,159			7.5			4.02		5.6
	Information regarding these market condition based stock options outstanding at March 31, 2015 and December 31, 2014 is summarized below:
		Number of			Weighted			Weighted		Aggregate
		Shares			Average			Average		Intrinsic
					Exercise			Remaining		Value
					Price			Contractual		(In millions)
								Life (years)
	December 31, 2014
	Options outstanding		50,000		$	11.94			6.15	$	0
	Options vested and expected to vestusing estimated forfeiture rates		45,430			11.94			6.15		0
	Options exercisable		0			0			0		0
	March 31, 2015
	Options outstanding		200,000		$	9.05			6.67	$	0.2
	Options vested and expected to vestusing estimated forfeiture rates		130,330			9.26			6.61		0.1
	Options exercisable		0			0			0		0
Schedule of Restricted Stock Units Activity	RSU activity for the three months ended March 31, 2015 and year ended December 31, 2014 was as follows:
		Three Months			Year
		Ended			Ended
		March 31,			December 31,
		2015			2014
	Beginning outstanding balance		564,891			668,056
	Awarded		273,290			265,630
	Released		(261,168	)		(317,970	)
	Forfeited		(11,865	)		(50,825	)
	Ending outstanding balance		565,148			564,891
	Weighted average grant date fair value of RSUs granted	$	8.09		$	11.35
	Total fair value of RSUs released		2,185,000			3,491,000
Schedule of Information Regarding Restricted Stock Units Outstanding	Information regarding RSUs outstanding at March 31, 2015 and December 31, 2014 is summarized below:
		Number of			Weighted			Aggregate
		Shares			Average			Intrinsic
					Remaining			Value
					Contractual			(In millions)
					Life (years)
	December 31, 2014
	RSUs outstanding		564,891			0.84		$	5.3
	RSUs vested and expected to vestusing estimated forfeiture rates		502,411			0.8			4.8
	March 31, 2015
	RSUs outstanding		565,148			1.54		$	5.2
	RSUs vested and expected to vestusing estimated forfeiture rates		437,437			1.48			4
Schedule of Restricted Stock Awards Activity	Restricted stock award activity for the three months ended March 31, 2015 and year ended December 31, 2014 was as follows:
		Three Months			Year
		Ended			Ended
		March 31,			December 31,
		2015			2014
	Beginning outstanding balance		35,364			44,000
	Awarded		0			35,364
	Released		0			(44,000	)
	Forfeited		0			0
	Ending outstanding balance		35,364			35,364
	Weighted average grant date fair value of restricted stock awarded	$	0		$	10.97
	Total fair value of restricted stock awards released		0			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
		March 31,
		2015			2014
	Standard Stock Options
	Expected life (in years)		4.7			4.7
	Volatility		56	%		57	%
	Interest rate		1.4	%		1.4	%
	Dividend yield		N/A			N/A
		Three Months Ended
		March 31,
		2015			2014
	Market Condition Based Stock Options
	Expected life (in years)		7			7
	Volatility		65	%		66	%
	Interest rate		1.9	%		2.2	%
	Dividend yield		N/A			N/A
		Three Months Ended
		March 31,
		2015			2014
	Employee Stock Purchase Plan
	Expected life (in years)		0.5			0.5
	Volatility		45	%		39	%
	Interest rate		0.1	%		0.1	%
	Dividend yield		N/A			N/A
Schedule of Stock-Based Compensation	Total stock-based compensation recognized in the condensed consolidated statements of operations and comprehensive income (loss) is as follows:
		Three Months Ended
		March 31,
		2015			2014
		(In thousands)
	Statement of Operations Classifications
	Sales and marketing	$	264		$	230
	Research and development		496			475
	General and administrative		980			878
	Total	$	1,740		$	1,583

Stockholders_Equity_Tables

Stockholders' Equity (Tables)	3 Months Ended
	Mar. 31, 2015
Equity [Abstract]
Changes in Accumulated Other Comprehensive Income (Loss)	The changes in accumulated other comprehensive income (loss) are included in the table below.
		Three Months Ended March 31, 2015
		Unrealized Gains		Foreign		Total
		and Losses on		Currency
		Available-for Sale		Items
		Securities
		(In thousands)
	Beginning balance	$	1	$	101	$	102
	Other comprehensive income (loss) before reclassifications		1		0		1
	Amounts reclassified from accumulated other comprehensive income (loss)		0		0		0
	Net current period other comprehensive income (loss)		1		0		1
	Ending Balance	$	2	$	101	$	103

Income_Taxes_Tables

Income Taxes (Tables)	3 Months Ended
	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Schedule of Income Tax Provisions	Income tax provisions consisted of the following:
		Three Months Ended
		March 31,
		2015			2014
		(In thousands)
	Income (loss) before provision for income taxes	$	(95	)	$	2,947
	Benefit (provision) for income taxes		36			(1,083	)
	Effective tax rate		37.9	%		36.7	%

Net_Income_Loss_Per_Share_Tabl

Net Income (Loss) Per Share (Tables)	3 Months Ended
	Mar. 31, 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 (loss) per share:
		Three Months Ended
		March 31,
		2015			2014
		(in thousands except
		per share amounts)
	Numerator:
	Net income (loss)	$	(59	)	$	1,864
	Denominator:
	Shares used in computation of basic net income (loss) per share (weighted average common shares outstanding)		27,818			28,370
	Dilutive potential common shares:
	Restricted Stock and RSUs		0			316
	Stock options		0			696
	Shares used in computation of diluted net income (loss) per share		27,818			29,382
	Basic net income (loss) per share	$	0		$	0.07
	Diluted net income (loss) per share	$	0		$	0.06
Schedule of Outstanding Securities	These outstanding securities consisted of the following:
		March 31,
		2015
	Outstanding stock options		3,875,153
	Unvested RSUs		565,148

Significant_Accounting_Policie2

Significant Accounting Policies - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2015
	Segment
Accounting Policies [Abstract]
Number of operating and reporting segments	1
Period of royalties notification, maximum	45 days
Period of royalties notification, minimum	30 days

Fair_Value_Measurements_Schedu

Fair Value Measurements - Schedule of Financial Instruments Measured at Fair Value on Recurring Basis (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	$62,510	$54,505
Short-term Investments [Member] | U.S. Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	37,987	42,981
Cash and Cash Equivalents [Member] | Money Market Accounts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	24,523	11,524
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	24,523	11,524
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Short-term Investments [Member] | U.S. Treasury Securities [Member]
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) [Member] | Cash and Cash Equivalents [Member] | Money Market Accounts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	24,523	11,524
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	37,987	42,981
Significant Other Observable Inputs (Level 2) [Member] | Short-term Investments [Member] | U.S. Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	37,987	42,981
Significant Other Observable Inputs (Level 2) [Member] | Cash and Cash Equivalents [Member] | Money Market Accounts [Member]
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) [Member]
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) [Member] | Short-term Investments [Member] | U.S. Treasury Securities [Member]
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) [Member] | Cash and Cash Equivalents [Member] | Money Market Accounts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	$0	$0

Fair_Value_Measurements_Additi

Fair Value Measurements - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Cash held in banks	$15,800,000	$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_Schedu1

Fair Value Measurements - Schedule of Short-Term Investments (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]
Short-term Investments, Amortized Cost	$37,985	$42,980
Short-term Investments, Gross Unrealized Holding Gains	2	1
Short-term Investments, Gross Unrealized Holding Losses	0	0
Short-term Investments, Fair Value	37,987	42,981
U.S. Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Short-term Investments, Amortized Cost	37,985	42,980
Short-term Investments, Gross Unrealized Holding Gains	2	1
Short-term Investments, Gross Unrealized Holding Losses	0	0
Short-term Investments, Fair Value	$37,987	$42,981

Accounts_and_Other_Receivables2

Accounts and Other Receivables - Schedule of Accounts and Other Receivables (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Receivables [Abstract]
Trade accounts receivable	$1,530	$2,708
Receivables from vendors and other	372	313
Accounts and other receivables	$1,902	$3,021

Property_and_Equipment_Schedul

Property and Equipment - Schedule of Property and Equipment (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Property, Plant and Equipment [Abstract]
Computer equipment and purchased software	$3,487	$3,418
Machinery and equipment	865	688
Furniture and fixtures	1,065	852
Leasehold improvements	2,523	1,295
Total	7,940	6,253
Less accumulated depreciation	-5,359	-5,046
Property and equipment, net	$2,581	$1,207

Intangibles_and_Other_Assets_S

Intangibles and Other Assets - Schedule of Intangibles and Other Assets (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Finite-Lived Intangible Assets [Line Items]
Other assets	$264	$265
Gross intangibles and other assets	4,869	4,870
Intangibles and other assets, net	278	291
Purchased Patents and Other Purchased Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Purchased patents and other purchased intangible assets	4,605	4,605
Accumulated amortization of purchased patents and other purchased intangibles	($4,591)	($4,579)

Intangibles_and_Other_Assets_A

Intangibles and Other Assets - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2015
Intangibles And Other Assets [Abstract]
Patents, estimated useful lives	10 years

Intangibles_and_Other_Assets_S1

Intangibles and Other Assets - Schedule of Amortization of Intangibles (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Intangibles And Other Assets [Abstract]
Amortization of intangibles	$12	$20

Intangibles_and_Other_Assets_S2

Intangibles and Other Assets - Schedule of Estimated Remaining Annual Amortization Expense for Purchased Patents (Detail) (USD $)	Mar. 31, 2015
In Thousands, unless otherwise specified
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Remainder of 2015	$8
2016	6
Total	$14

Components_of_Other_Current_Li2

Components of Other Current Liabilities - Components of Other Current Liabilities (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Other Liabilities, Current [Abstract]
Accrued legal	$1,992	$1,065
Accrued services	1,128	518
Income taxes payable	47	69
Other current liabilities	611	573
Total other current liabilities	$3,778	$2,225

Longterm_Deferred_Revenue_Sche

Long-term Deferred Revenue - Schedule of Long-term Deferred Revenue (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Deferred Revenue Disclosure [Abstract]
Deferred revenue for Sony Computer Entertainment	$5,604	$7,051
Other deferred revenue	709	776
Long-term deferred revenue	$6,313	$7,827

StockBased_Compensation_Additi

Stock-Based Compensation - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 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	581,451
Shares purchased under ESPP	23,713	17,670
Unrecognized compensation cost	$9,200,000
Market Condition Based Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost, recognized over an estimated weighted-average period (years)	3 years 8 months 1 day
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based payment award vesting period (years)	4 years
Stock Options [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based payment award expiration period (years)	10 years
Stock Options [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based payment award expiration period (years)	5 years
Restricted Stock Awards [Member]
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)	2 months 5 days
Restricted Stock Units [Member]
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)	2 years 2 months 23 days
Standard Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost, recognized over an estimated weighted-average period (years)	2 years 11 months 23 days

StockBased_Compensation_Schedu

Stock-Based Compensation - Schedule of Stock Options and Awards (Detail)	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock shares available for grant	1,440,213
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock options outstanding	3,875,153
Restricted Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock awards and units outstanding	35,364	35,364	44,000
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock awards and units outstanding	565,148	564,891	668,056

StockBased_Compensation_Schedu1

Stock-Based Compensation - Schedule of Employee Stock Purchase Plan (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Shares purchased under ESPP	23,713	17,670
Average price of shares purchased under ESPP	$8
Intrinsic value of shares purchased under ESPP	$33,000

StockBased_Compensation_Schedu2

Stock-Based Compensation - Schedule of Standard and Market-based Stock Options Activity (Detail) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Standard Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning outstanding balance	3,486,157	3,227,167
Granted	260,175	604,620
Exercised	-10,862	-205,744
Forfeited	-60,317	-102,454
Expired	0	-37,432
Ending outstanding balance	3,675,153	3,486,157
Aggregate intrinsic value of options exercised	$30,000	$1,125,000
Weighted average fair value of options granted	$3.84	$4.93
Market Condition Based Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
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	$0	$0
Weighted average fair value of options granted	$3.64	$5.71

StockBased_Compensation_Schedu3

Stock-Based Compensation - Schedule of Information Regarding Standard and Market Condition Based Stock Options Outstanding (Detail) (USD $)	3 Months Ended	12 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Standard Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, Number of Shares	3,675,153	3,486,157	3,227,167
Options vested and expected to vest using estimated forfeiture rates, Number of Shares	3,529,945	3,319,308
Options exercisable, Number of Shares	2,270,159	2,023,024
Options outstanding, Weighted Average Exercise Price	$8.21	$8.30
Options vested and expected to vest using estimated forfeiture rates, Weighted Average Exercise Price	$8.16	$8.21
Options exercisable, Weighted Average Exercise Price	$7.50	$7.18
Options outstanding, Weighted Average Remaining Contractual Life (years)	4 years 8 months 5 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 7 months 13 days	4 years 9 months 18 days
Options exercisable, Weighted Average Remaining Contractual Life (years)	4 years 7 days	4 years 3 months 4 days
Options outstanding, Aggregate Intrinsic Value	$6.30	$6.60
Options vested and expected to vest using estimated forfeiture rates, Aggregate Intrinsic Value	6.2	6.6
Options exercisable, Aggregate Intrinsic Value	5.6	6
Market Condition Based Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, Number of Shares	200,000	50,000	0
Options vested and expected to vest using estimated forfeiture rates, Number of Shares	130,330	45,430
Options exercisable, Number of Shares	0	0
Options outstanding, Weighted Average Exercise Price	$9.05	$11.94
Options vested and expected to vest using estimated forfeiture rates, Weighted Average Exercise Price	$9.26	$11.94
Options exercisable, Weighted Average Exercise Price	$0	$0
Options outstanding, Weighted Average Remaining Contractual Life (years)	6 years 8 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 7 months 10 days	6 years 1 month 24 days
Options exercisable, Weighted Average Remaining Contractual Life (years)	0 years	0 years
Options outstanding, Aggregate Intrinsic Value	0.2	0
Options vested and expected to vest using estimated forfeiture rates, Aggregate Intrinsic Value	0.1	0
Options exercisable, Aggregate Intrinsic Value	$0	$0

StockBased_Compensation_Schedu4

Stock-Based Compensation - Schedule of Restricted Stock Units Activity (Detail) (Restricted Stock Units [Member], USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning outstanding balance	564,891	668,056
Awarded	273,290	265,630
Released	-261,168	-317,970
Forfeited	-11,865	-50,825
Ending outstanding balance	565,148	564,891
Weighted average grant date fair value of RSUs granted	$8.09	$11.35
Total fair value of RSUs released	$2,185,000	$3,491,000

StockBased_Compensation_Schedu5

Stock-Based Compensation - Schedule of Information Regarding Restricted Stock Units Outstanding (Detail) (Restricted Stock Units [Member], USD $)	3 Months Ended	12 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs outstanding, Number of Shares	565,148	564,891	668,056
RSUs vested and expected to vest using estimated forfeiture rates, Number of Shares	437,437	502,411
RSUs outstanding, Weighted Average Remaining Contractual Life (years)	1 year 6 months 15 days	10 months 2 days
RSUs vested and expected to vest using estimated forfeiture rates, Weighted Average Remaining Contractual Life (years)	1 year 5 months 23 days	9 months 18 days
RSUs outstanding, Aggregate Intrinsic Value	$5.20	$5.30
RSUs vested and expected to vest using estimated forfeiture rates, Aggregate Intrinsic Value	$4	$4.80

StockBased_Compensation_Schedu6

Stock-Based Compensation - Schedule of Restricted Stock Awards Activity (Detail) (Restricted Stock Awards [Member], USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Restricted Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning outstanding balance	35,364	44,000
Awarded	0	35,364
Released	0	-44,000
Forfeited	0	0
Ending outstanding balance	35,364	35,364
Weighted average grant date fair value of restricted stock awarded	$0	$10.97
Total fair value of restricted stock awards released	$0	$483,000

StockBased_Compensation_Schedu7

Stock-Based Compensation - Schedule of Stock Options, Market Condition Based Stock Options and Employee Stock Purchase Plan, Valuation Assumptions (Detail)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Standard Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life (in years)	4 years 8 months 12 days	4 years 8 months 12 days
Volatility	56.00%	57.00%
Interest rate	1.40%	1.40%
Dividend yield
Market Condition Based Stock Options [Member]
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%
Dividend yield
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life (in years)	6 months	6 months
Volatility	45.00%	39.00%
Interest rate	0.10%	0.10%
Dividend yield

StockBased_Compensation_Schedu8

Stock-Based Compensation - Schedule of Stock-Based Compensation (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total	$1,740	$1,583
Sales and Marketing [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total	264	230
Research and Development [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total	496	475
General and Administrative [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total	$980	$878

Stockholders_Equity_Changes_in

Stockholders' Equity - Changes in Accumulated Other Comprehensive Income (Loss) (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$102
Other comprehensive income (loss) before reclassifications	1
Amounts reclassified from accumulated other comprehensive income (loss)	0
Net current period other comprehensive income (loss)	1
Ending Balance	103
Unrealized Gains and Losses on Available-for Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	1
Other comprehensive income (loss) before reclassifications	1
Amounts reclassified from accumulated other comprehensive income (loss)	0
Net current period other comprehensive income (loss)	1
Ending Balance	2
Foreign Currency Items [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	101
Other comprehensive income (loss) before reclassifications	0
Amounts reclassified from accumulated other comprehensive income (loss)	0
Net current period other comprehensive income (loss)	0
Ending Balance	$101

Stockholders_Equity_Additional

Stockholders' Equity - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Oct. 22, 2014	Nov. 01, 2007
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, additional authorized amount			$30,000,000
Repurchased shares	0	605,419
Repurchased shares, value		6,900,000
Stock repurchase program, average cost		$11.20
Stock repurchase program, remaining available repurchase amount	34,400,000
Maximum [Member]
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, additional authorized amount				$50,000,000

Income_Taxes_Schedule_of_Incom

Income Taxes - Schedule of Income Tax Provisions (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Income Tax Disclosure [Abstract]
Income (loss) before provision for income taxes	($95)	$2,947
Benefit (provision) for income taxes	$36	($1,083)
Effective tax rate	37.90%	36.70%

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015
Income Taxes [Line Items]
Unrecognized tax benefits	$1,800,000
Unrecognized tax benefits, interest	75,000
Unrecognized tax benefits that would affect the Company's effective tax rate	275,000
Changes in the amount of unrecognized tax benefits	0
Net deferred income taxes	34,900,000
State and Foreign [Member]
Income Taxes [Line Items]
Valuation allowance of deferred tax assets	$7,500,000

Net_Income_Loss_Per_Share_Reco

Net Income (Loss) Per Share - Reconciliation used in Computing Basic and Diluted Net Income (Loss) per Share (Detail) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Numerator:
Net income (loss)	($59)	$1,864
Denominator:
Shares used in computation of basic net income (loss) per share (weighted average common shares outstanding)	27,818	28,370
Dilutive potential common shares:
Restricted Stock and RSUs	0	316
Stock options	0	696
Shares used in computation of diluted net income (loss) per share	27,818	29,382
Basic net income (loss) per share	$0	$0.07
Diluted net income (loss) per share	$0	$0.06

Net_Income_Loss_Per_Share_Sche

Net Income (Loss) Per Share - Schedule of Outstanding Securities (Detail)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2015
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Outstanding securities having potential to dilute basic EPS	1,400,000
Outstanding Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Outstanding securities having potential to dilute basic EPS		3,875,153
Restricted Stock Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Outstanding securities having potential to dilute basic EPS		565,148

Net_Income_Loss_Per_Share_Addi

Net Income (Loss) Per Share - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014
Earnings Per Share [Abstract]
Options to purchase shares of common stock	1,400,000
Average fair market value of stock	$11.21