Peraso (PRSO) 10-Q 8 Nov 13 2013 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 30, 2013	Nov. 01, 2013
Document and Entity Information	'	'
Entity Registrant Name	'MoSys, Inc.	'
Entity Central Index Key	'0000890394	'
Document Type	'10-Q	'
Document Period End Date	30-Sep-13	'
Amendment Flag	'false	'
Current Fiscal Year End Date	'--12-31	'
Entity Current Reporting Status	'Yes	'
Entity Filer Category	'Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	48,411,904
Document Fiscal Year Focus	'2013	'
Document Fiscal Period Focus	'Q3	'

CONDENSED_CONSOLIDATED_BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Current assets	'	'
Cash and cash equivalents	$2,174	$2,529
Short-term investments	33,409	30,798
Accounts receivable, net	54	287
Prepaid expenses and other current assets	1,768	1,362
Total current assets	37,405	34,976
Long-term investments	17,671	7,383
Property and equipment, net	780	1,238
Goodwill	23,134	23,134
Intangible assets, net	1,904	2,654
Other assets	137	149
Total assets	81,031	69,534
Current liabilities	'	'
Accounts payable	195	393
Accrued expenses and other liabilities	1,642	3,947
Deferred revenue	205	481
Total current liabilities	2,042	4,821
Long-term liabilities	208	171
Commitments and contingencies (Note 4)	'	'
Stockholders' equity	'	'
Preferred stock, $0.01 par value; 20,000 shares authorized; none issued and outstanding	'	'
Common stock, $0.01 par value; 120,000 shares authorized; 48,322 shares and 40,054 shares issued and outstanding at September 30, 2013 and December 31, 2012, respectively	483	401
Additional paid-in capital	189,657	157,143
Accumulated other comprehensive income (loss)	-8	11
Accumulated deficit	-111,351	-93,013
Total stockholders' equity	78,781	64,542
Total liabilities and stockholders' equity	$81,031	$69,534

CONDENSED_CONSOLIDATED_BALANCE1

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, except Per Share data, unless otherwise specified
CONDENSED CONSOLIDATED BALANCE SHEETS	'	'
Preferred stock, par value (in dollars per share)	$0.01	$0.01
Preferred stock, shares authorized	20,000	20,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$0.01	$0.01
Common stock, shares authorized	120,000	120,000
Common stock, shares issued	48,322	40,054
Common stock, shares outstanding	48,322	40,054

CONDENSED_CONSOLIDATED_STATEME

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net revenue	'	'	'	'
Licensing and other	$141	$248	$550	$1,113
Royalty	816	1,079	2,862	3,374
Total net revenue	957	1,327	3,412	4,487
Cost of net revenue	'	'	'	'
Licensing and other	158	53	254	289
Total cost of net revenue	158	53	254	289
Gross profit	799	1,274	3,158	4,198
Operating expenses	'	'	'	'
Research and development	6,243	7,026	17,546	21,220
Selling, general and administrative	1,595	1,738	4,678	6,092
Gain on sale of assets	'	-1,435	-630	-3,291
Total operating expenses	7,838	7,329	21,594	24,021
Loss from operations	-7,039	-6,055	-18,436	-19,823
Other income, net	122	61	166	121
Loss before income taxes	-6,917	-5,994	-18,270	-19,702
Income tax provision	28	79	68	139
Net loss	-6,945	-6,073	-18,338	-19,841
Other comprehensive loss, net of tax:	'	'	'	'
Net unrealized gains (losses) on available-for-sale securities	51	27	-19	25
Comprehensive loss	($6,894)	($6,046)	($18,357)	($19,816)
Net loss per share	'	'	'	'
Basic and diluted (in dollars per share)	($0.14)	($0.15)	($0.42)	($0.51)
Shares used in computing net loss per share	'	'	'	'
Basic and diluted (in shares)	48,164	39,299	44,173	38,919

CONDENSED_CONSOLIDATED_STATEME1

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Cash flows from operating activities:	'	'
Net loss	($18,338)	($19,841)
Adjustments to reconcile net loss to net cash used in operating activities:	'	'
Depreciation and amortization	565	730
Stock-based compensation	2,800	2,991
Amortization of intangible assets	750	1,496
Gain on sale of assets	-630	-3,291
Other non-cash items	13	-27
Changes in assets and liabilities:	'	'
Accounts receivable	233	968
Prepaid expenses and other assets	-368	161
Deferred revenue	-276	-257
Accounts payable	-198	-211
Accrued expenses and other liabilities	-2,268	-203
Net cash used in operating activities	-17,717	-17,484
Cash flows from investing activities:	'	'
Purchases of property and equipment	-120	-257
Net proceeds from sale of assets	630	3,437
Proceeds from sales and maturities of marketable securities	40,967	29,175
Purchases of marketable securities	-53,885	-50,497
Net cash used in investing activities	-12,408	-18,142
Cash flows from financing activities:	'	'
Proceeds from issuance of common stock	2,024	3,146
Proceeds from sale of common stock, net of issuance costs	27,746	'
Repurchase of common stock (Note 4)	'	-1,444
Payments on capital lease obligations	'	-134
Net cash provided by financing activities	29,770	1,568
Net decrease in cash and cash equivalents	-355	-34,058
Cash and cash equivalents at beginning of period	2,529	40,025
Cash and cash equivalents at end of period	$2,174	$5,967

The_Company_and_Summary_of_Sig

The Company and Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2013
The Company and Summary of Significant Accounting Policies	'
The Company and Summary of Significant Accounting Policies	'
	Note 1. The Company and Summary of Significant Accounting Policies
	The Company
	MoSys, Inc. (the “Company”) was incorporated in California in September 1991, and reincorporated in September 2000 in Delaware. The Company has been designing, developing, marketing and licensing high-performance semiconductor memory and high-speed parallel and serial interface (SerDes) intellectual property (IP) used by the semiconductor industry and communications, networking and storage equipment manufacturers. In February 2010, the Company announced the commencement of a new product initiative to develop a family of integrated circuit (IC) products under the “Bandwidth Engine” product name. Bandwidth Engine ICs combine the Company’s proprietary high-density embedded memory with its high-speed 10 Gigabits per second and higher interface (I/O) technology. In March 2013, the Company announced another IC product line under the “LineSpeed” product name. LineSpeed  ICs are non-memory based, high-speed SerDes devices with gearbox or retimer functionality, which convert lanes of data received on line cards into different configurations and/or ensure signal integrity.  Both product lines are initially being marketed to networking and telecommunications systems companies.  The Company’s strategy and primary business objective is to become an IP-rich fabless semiconductor company focused on development and sale of IC products. The Company’s future success and ability to achieve and maintain profitability depends on its success in developing a market for its ICs.
	The accompanying condensed consolidated financial statements of the Company have been prepared without audit in accordance with the rules and regulations of the Securities and Exchange Commission (SEC).  The condensed consolidated balance sheet at December 31, 2012 has been derived from the audited consolidated financial statements at that date. Certain information and disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States (GAAP) have been condensed or omitted in accordance with these rules and regulations. The information in this report should be read in conjunction with the Company’s consolidated financial statements and notes thereto included in its most recent annual report on Form 10-K filed with the SEC.
	In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all adjustments (consisting only of normal recurring adjustments) necessary to summarize fairly the Company’s financial position, results of operations and cash flows for the interim periods presented. The operating results for the three and nine months ended September 30, 2013 are not necessarily indicative of the results that may be expected for the year ending December 31, 2013 or for any other future period.
	Basis of Presentation
	The condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All significant intercompany transactions and balances have been eliminated in consolidation. The Company’s fiscal year is the calendar year.
	Reclassification
	Certain prior year amounts have been reclassified to conform to the current year presentation. The reclassification includes reclassifying unbilled contracts receivable into the prepaid expenses and other current assets line item of the condensed consolidated balance sheets. The amount for the prior period has been reclassified to be consistent with the current year presentation and has no impact on previously reported total assets, total stockholders’ equity, net loss or comprehensive loss.
	Use of Estimates
	The preparation of financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and reported amounts of revenues and expenses recognized during the reported period. Actual results could differ from those estimates.
	Cash Equivalents and Investments
	The Company has invested its excess cash in money market accounts, certificates of deposit, corporate debt, government agency and municipal debt securities and considers all highly liquid debt instruments purchased with an original maturity of three months or less to be cash equivalents. Investments with original maturities greater than three months and remaining maturities less than one year are classified as short-term investments. Investments with remaining maturities greater than one year are classified as long-term investments. Management generally determines the appropriate classification of securities at the time of purchase. All securities are classified as available-for-sale. The Company’s available-for-sale short-term and long-term investments are carried at fair value, with the unrealized holding gains and losses reported in accumulated other comprehensive income. Realized gains and losses and declines in the value judged to be other than temporary are included in the other income, net line item in the condensed consolidated statements of operations and comprehensive loss. The cost of securities sold is based on the specific identification method.
	Fair Value Measurements
	The Company measures the fair value of financial instruments using a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value into three broad levels, as follows:
	Level 1— Inputs used to measure fair value are unadjusted quoted prices that are available in active markets for the identical assets or liabilities as of the reporting date.
	Level 2— Pricing is provided by third party sources of market information obtained through the Company’s investment advisors rather than models. The Company does not adjust for or apply any additional assumptions or estimates to the pricing information it receives from advisors. The Company’s Level 2 securities include cash equivalents and available-for-sale securities, which consisted primarily of certificates of deposit, corporate debt, and government agency and municipal debt securities from issuers with high quality credit ratings. The Company’s investment advisors obtain pricing data from independent sources, such as Standard & Poor’s, Bloomberg and Interactive Data Corporation, and rely on comparable pricing of other securities because the Level 2 securities are not actively traded and have fewer observable transactions. The Company considers this the most reliable information available for the valuation of the securities.
	Level 3— Unobservable inputs that are supported by little or no market activity and reflect the use of significant management judgment are used to measure fair value. These values are generally determined using pricing models for which the assumptions utilize management’s estimates of market participant assumptions. The determination of fair value for Level 3 investments and other financial instruments involves the most management judgment and subjectivity.
	Allowance for Doubtful Accounts
	The Company establishes an allowance for doubtful accounts to ensure that its trade receivables balances are not overstated due to uncollectibility. The Company performs ongoing customer credit evaluations within the context of the industry in which it operates and generally does not require collateral from its customers. A specific allowance of up to 100% of the invoice value is provided for any problematic customer balances. Delinquent account balances are written off after management has determined that the likelihood of collection is remote. The Company grants credit only to customers deemed creditworthy in the judgment of management. There was no allowance for doubtful accounts receivable at September 30, 2013 or December 31, 2012.
	Revenue Recognition
	General
	The Company generates revenue from the licensing of its IP and sales of IC products. The Company recognizes revenue when persuasive evidence of an arrangement exists, delivery or performance has occurred, the sales price is fixed or determinable, and collectibility is reasonably assured. Evidence of an arrangement generally consists of signed agreements or customer purchase orders.
	Licensing
	Licensing revenue consists of fees earned from license agreements, development services and support and maintenance. For stand-alone license agreements or license deliverables in multi-deliverable arrangements that do not require significant development, modification or customization, revenues are recognized when all revenue recognition criteria have been met. Delivery of the licensed technology is typically the final revenue recognition criterion met, at which time revenue is recognized. If any of the criteria are not met, revenue recognition is deferred until such time as all criteria have been met.
	When sales arrangements contain multiple deliverables (e.g., license and services), the Company reviews each deliverable to determine the separate units of accounting that exist within the agreement. If more than one unit of accounting exists, the consideration payable to the Company under the agreement is allocated to each unit of accounting using the relative fair value method. Revenue is recognized for each unit of accounting when the revenue recognition criteria have been met for that unit of accounting. The Company allocates revenue among the deliverables using the relative selling price method. Revenue allocated to each element is recognized when the basic revenue recognition criteria is met for each element. Under GAAP, the Company is required to apply a hierarchy to determine the selling price to be used for allocating revenue to deliverables: (i) vendor-specific objective evidence of fair value (VSOE), (ii) third-party evidence of selling price (TPE) and (iii) best estimate of the selling price (ESP). In general, the Company is unable to establish VSOE or TPE for license fees and development services. Therefore revenue is allocated to these elements based on the Company’s ESP, which the Company determines after considering multiple factors such as management approved pricing guidelines, geographic differences, market conditions, competitor pricing strategies, internal costs and gross margin objectives. These factors may vary over time depending upon the unique facts and circumstances related to each deliverable. If the facts and circumstances underlying the factors considered change or should future facts and circumstances lead the Company to consider additional factors, the Company’s ESP for license fee and development services could change.
	For license agreements involving deliverables that do require significant production, modification or customization, and where the Company has significant experience in meeting the design specifications in the contract and the direct labor hours related to services under the contract can be reasonably estimated, the Company recognizes revenue over the period in which the contract services are performed. For these arrangements, the Company recognizes revenue using the percentage of completion method. Under this method, revenue recognized in any period depends on the Company’s progress toward completion of projects in progress. Significant management judgment and discretion are used to estimate total direct labor hours. These judgmental elements include determining that the Company has the experience to meet the design specifications and estimate the total direct labor hours to perform the contract services, based on experience in developing prior licensees’ designs. The direct labor hours for the development of the licensee’s design are estimated at the beginning of the contract. As the direct labor hours are incurred, they are used as a measure of progress towards completion. During the contract performance period, the Company reviews estimates of direct labor hours to complete the contracts and will revise its estimates of revenue and gross profit under the contract if it revises the estimations of the direct labor hours to complete. The Company’s policy is to reflect any revision in the contract gross profit estimate in reported income or loss in the period in which the facts giving rise to the revision become known. Under the percentage of completion method, provisions for estimated losses on uncompleted contracts are recorded in the period in which such losses are determined to be likely.
	The Company provides support and maintenance under many of its license agreements. Under these arrangements, the Company provides unspecified upgrades, design rule changes and technical support. No other upgrades, products or other post-contract support are provided. Support and maintenance revenue is recognized at its fair value established by VSOE, ratably over the period during which the obligation exists, typically 12 months. These arrangements are generally renewable annually by the customer.
	Royalty
	The Company’s licensing contracts typically also provide for royalties based on licensees’ use of the Company’s memory technology in their currently shipping commercial products. The Company recognizes royalties in the quarter in which it receives the licensee’s report. Under limited circumstances, the Company may also recognize prepaid post-production royalties as revenue upon execution of the contract, which are paid in a lump sum after the licensee commences production of the royalty-bearing product and applied against future unit shipments regardless of the actual level of shipments by the licensee. The criteria for revenue recognition of prepaid royalties are that a formal agreement with the licensee is executed, no deliverables, development or support services related to prepaid royalties are required, the fees are non-refundable and not contingent upon future product shipments by the licensee, and the fees are payable by the licensee in a time period consistent with the Company’s normal billing terms. If any of these criteria are not met, the Company defers revenue recognition until such time as all criteria have been met.
	IC products
	The Company sells products both directly to customers, as well as through distributors. Revenue from sales directly to customers is generally recognized at the time of shipment. The Company records an estimated allowance, at the time of shipment, for future returns and other charges against revenue consistent with the terms of sale. IC product revenue and costs relating to sales made through distributors with rights of return and stock rotation are deferred until the distributors sell the product to end customers due to the Company’s inability to estimate future returns and credits to be issued. Distributors are generally able to return up to 10% of their purchases for slow, non-moving or obsolete inventory for credit every six months. At the time of shipment to distributors, an accounts receivable for the selling price is recorded, as there is a legally enforceable right to receive payment, and inventory is relieved, as legal title to the inventory is transferred upon shipment. Revenues are recognized upon receiving notification from the distributors that products have been sold to end customers. Distributors provide information regarding products and quantity, end customer shipments and remaining inventory on hand. The associated deferred margin is included in the deferred revenues line item in the condensed consolidated balance sheet. The Company recorded initial IC product revenue in 2012, and a significant reserve for returns has been recorded due to the product’s early stage of testing and deployment in customer systems. IC product revenue was not significant for the three and nine months ended September 30, 2013 and 2012, and has been included in the licensing and other revenue line item in the condensed consolidated statements of operations and comprehensive loss.
	Cost of Revenue
	Cost of licensing and other revenue consists primarily of direct and indirect costs of IC product sales and engineering personnel costs directly related to maintenance and support services specified in licensing agreements.  Maintenance and support typically includes engineering support to assist in the commencement of production of a licensee’s products.
	Goodwill
	The Company reviews goodwill for impairment on an annual basis or whenever events or changes in circumstances indicate the carrying value of an asset may not be recoverable. The Company first assesses qualitative factors to determine whether it is more-likely-than-not that the fair value of the reporting unit is less than the carrying amount as a basis for determining whether it is necessary to perform the two-step impairment test. If the qualitative assessment warrants further analysis, the Company compares the fair value of the reporting unit to its carrying value. The fair value of the reporting unit is determined using the market approach. If the fair value of the reporting unit exceeds the carrying value of net assets of the reporting unit, goodwill is not impaired, and the Company is not required to perform further testing. If the carrying value of the reporting unit’s goodwill exceeds its implied fair value, then the Company must record an impairment charge equal to the difference. The Company has determined that it has a single reporting unit for purposes of performing its goodwill impairment test. As the Company used the market approach to assess impairment in the second step of the analysis, the price of its common stock is an important component of the fair value calculation. If the Company’s stock price continues to experience significant price and volume fluctuations, this will impact the fair value of the reporting unit, which can lead to potential impairment in future periods. The Company performed step one of the annual impairment test in September 2013, and determined that its goodwill was not impaired.
	Intangible Assets
	Intangible assets acquired in business combinations are accounted for based on the fair value of assets purchased and are amortized over the period in which economic benefit is estimated to be received. Identifiable intangible assets were as follows (dollar amounts in thousands):
		September 30, 2013
		Life	Gross		Accumulated		Net
		(years)	Carrying		Amortization		Carrying
			Amount				Value
	Developed technology	5-Mar	$	9,240	$	7,921	$	1,319
	Patent license	7	780		195		585
	Total		$	10,020	$	8,116	$	1,904
		December 31, 2012
		Life	Gross		Accumulated		Net
		(years)	Carrying		Amortization		Carrying
			Amount				Value
	Developed technology	5-Mar	$	9,240	$	7,255	$	1,985
	Customer relationships	3	390		390		—
	Subtotal purchased intangible assets		9,630		7,645		1,985
	Patent license	7	780		111		669
	Total		$	10,410	$	7,756	$	2,654
	The related amortization expense was $0.3 million for each of the three months ended September 30, 2013 and 2012. The related amortization expense was $0.8 million and $1.5 million for the nine months ended September 30, 2013 and 2012, respectively. Amortization expense has been included in research and development expense in the condensed consolidated statements of operations and comprehensive loss.  The estimated aggregate amortization expense to be recognized in future years is approximately $0.3 million for the remainder of 2013, $1.0 million for 2014, $0.3 million for 2015 and $0.1 million annually for 2016 through 2018.
	Per Share Amounts
	Basic net loss per share is computed by dividing net loss for the period by the weighted-average number of shares of common stock outstanding during the period. Diluted net loss per share gives effect to all potentially dilutive common shares outstanding during the period. Potentially dilutive common shares consist of incremental shares of common stock issuable upon the exercise of stock options, vesting of stock awards and purchases under the employee stock purchase plan. As of September 30, 2013 and 2012, stock awards to purchase approximately 10,662,000 and 10,990,000 shares, respectively, were excluded from the computation of diluted net loss per share as their inclusion would be anti-dilutive.
	Comprehensive Loss
	Comprehensive loss includes unrealized gains and losses on available-for-sale securities.  Realized gains and losses on available-for-sale securities are reclassified from accumulated other comprehensive loss and included in other income, net in the condensed consolidated statements of operations and comprehensive loss.

Fair_Value_of_Financial_Instru

Fair Value of Financial Instruments	9 Months Ended
	Sep. 30, 2013
Fair Value of Financial Instruments	'
Fair Value of Financial Instruments	'
	Note 2. Fair Value of Financial Instruments
	The estimated fair values of financial instruments outstanding were as follows (in thousands):
		September 30, 2013
		Cost		Unrealized			Unrealized			Fair
				Gains			Losses			Value
	Cash and cash equivalents	$	2,174	$	—		$	—		$	2,174
	Short-term investments:
	U.S. government debt securities	$	20,753	$	12		$	(3	)	$	20,762
	Corporate notes	7,643		2			(1		)	7,644
	Certificates of deposit	5,005		1			(3		)	5,003
	Total short-term investments	$	33,401	$	15		$	(7	)	$	33,409
	Long-term investments:
	U.S. government debt securities	$	5,220	$	3		$	(1	)	$	5,222
	Corporate notes	10,307		1			(13		)	10,295
	Certificates of deposit	2,160		1			(7		)	2,154
	Total long-term investments	$	17,687	$	5		$	(21	)	$	17,671
		December 31, 2012
		Cost		Unrealized			Unrealized			Fair
				Gains			Losses			Value
	Cash and cash equivalents	$	2,529	$	—		$	—		$	2,529
	Short-term investments:
	U.S. government debt securities	$	15,852	$	6		$	(2	)	$	15,856
	Corporate notes	14,471		8			(4		)	14,475
	Certificates of deposit	467		—			—			467
	Total short-term investments	$	30,790	$	14		$	(6	)	$	30,798
	Long-term investments:
	U.S. government debt securities	$	6,330	$	2		$	—		$	6,332
	Corporate notes	1,050		1			—			1,051
	Total long-term investments	$	7,380	$	3		$	—		$	7,383
	The estimated fair values of available-for-sale securities with unrealized losses were as follows (in thousands):
		September 30, 2013
		Cost		Unrealized			Fair
				Losses			Value
	Short-term investments:
	U.S. government debt securities	$	2,041	$	(3	)	$	2,038
	Corporate notes	3,270		(1		)	3,269
	Certificates of deposit	3,320		(3		)	3,317
	Total short-term investments	$	8,631	$	(7	)	$	8,624
	Long-term investments:
	U.S. government debt securities	$	3,758	$	(1	)	$	3,757
	Corporate notes	9,286		(13		)	9,273
	Certificates of deposit	1,680		(7		)	1,673
	Total long-term investments	$	14,724	$	(21	)	$	14,703
		December 31, 2012
		Cost		Unrealized			Fair
				Losses			Value
	Short-term investments:
	U.S. government debt securities	$	2,546	$	(2	)	$	2,544
	Corporate notes	5,668		(4		)	5,664
	Total short-term investments	$	8,214	$	(6	)	$	8,208
	As of September 30, 2013 and December 31, 2012, all of the available-for-sale securities with unrealized losses had been in a loss position for less than 12 months.
	Cost and fair value of investments based on two maturity groups were as follows (in thousands):
		September 30, 2013
		Cost		Unrealized			Unrealized			Fair
				Gains			Losses			Value
	Due within 1 year	$	33,401	$	15		$	(7	)	$	33,409
	Due in 1-2 years	17,687		5			(21		)	17,671
	Total	$	51,088	$	20		$	(28	)	$	51,080
		December 31, 2012
		Cost		Unrealized			Unrealized			Fair
				Gains			Losses			Value
	Due within 1 year	$	30,790	$	14		$	(6	)	$	30,798
	Due in 1-2 years	7,380		3			—			7,383
Total	$	38,170	$	17		$	(6	)	$	38,181
The following table represents the Company’s fair value hierarchy for its financial assets (cash equivalents and investments) as of September 30, 2013 and December 31, 2012 (in thousands):
	September 30, 2013
	Fair Value		Level 1			Level 2			Level 3
Money market funds	$	1,682	$	1,682		$	—		$	—
Certificates of deposit	7,397		—			7,397			—
Corporate notes	17,939		—			17,939			—
U.S. government debt securities	25,984		—			25,984			—
Total assets	$	53,002	$	1,682		$	51,320		$	—
	December 31, 2012
	Fair Value		Level 1			Level 2			Level 3
Money market funds	$	1,407	$	1,407		$	—		$	—
U.S. government debt securities	22,289		—			22,289			—
Corporate notes	16,226		—			16,226			—
Certificates of deposit	467		—			467			—
Total assets	$	40,389	$	1,407		$	38,982		$	—
There were no transfers in or out of Level 1 and Level 2 securities during the three and nine months ended September 30, 2013 and 2012. As of September 30, 2013 and December 31, 2012, the Company had no Level 3 financial assets or financial liabilities measured at fair value on a recurring basis.

Sale_of_IO_Technology

Sale of I/O Technology	9 Months Ended
	Sep. 30, 2013
Sale of I/O Technology	'
Sale of I/O Technology	'
	Note 3: Sale of I/O Technology
	In March 2012, the Company entered into an asset purchase agreement for the sale of a portion of its intellectual property pertaining to its high-speed serial I/O technology for a gain of approximately $4.3 million. As part of the agreement, the Company provided certain technology transfer support services, and 15 employees of the Company’s India subsidiary accepted employment with the purchaser. The Company received approximately $2.2 million, net of transaction costs, in cash upon execution of the agreement. The agreement provided for an additional $1.9 million (the “Holdback”) to be paid upon providing technology transfer support services, achievement of certain contractually agreed-upon development milestones and expiration of an indemnification period.  In July 2012 and March 2013, $1.3 million and $0.6 million, respectively, of Holdback payments were received, and no further amounts are due to the Company.  These amounts have been recorded as gains on sale of assets and reductions of operating expenses in the condensed consolidated statements of operations and comprehensive loss.

Commitments_and_Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2013
Commitments and Contingencies	'
Commitments and Contingencies	'
	Note 4. Commitments and Contingencies
	Indemnifications
	In the ordinary course of business, the Company enters into contractual arrangements under which it may agree to indemnify the counterparties from any losses incurred relating to breach of representations and warranties, failure to perform certain covenants, or claims and losses arising from certain events as outlined within the particular contract, which may include, for example, losses arising from litigation or claims relating to past performance. Such indemnification clauses may not be subject to maximum loss clauses. The Company has entered into indemnification agreements with its officers and directors. No material amounts were reflected in the Company’s condensed consolidated financial statements for the three and nine months ended September 30, 2013 or 2012 related to these indemnifications.
	The Company has not estimated the maximum potential amount of indemnification liability under these agreements due to the limited history of prior claims and the unique facts and circumstances applicable to each particular agreement. To date, the Company has not made any payments related to these indemnification agreements.
	Legal Matters
	The Company is not a party to any material legal proceeding that the Company believes is likely to have a material adverse effect on its consolidated financial position or results of operations. From time to time the Company may be subject to legal proceedings and claims in the ordinary course of business. These claims, even if not meritorious, could result in the expenditure of significant financial resources and diversion of management efforts.
	In September 2010, a claimant filed suit against the Company seeking a contractual payment of approximately 200,000 shares of the Company’s common stock, among other claims. In November 2010, the suit went to arbitration, and, in December 2010, the Company filed a counter claim against the claimant.  On April 3, 2012, the arbitrator ruled against the Company and awarded the claimant a cash award of approximately $1.4 million, which was paid in the second quarter of 2012 and has been recorded as a repurchase of common stock in the condensed consolidated statement of cash flows.  The Company repurchased the disputed shares in the second quarter of 2012, and the shares were retired.  In the first quarter of 2012, the value of the disputed shares, $0.8 million as of the arbitration settlement date, was recorded as a reduction to stockholders’ equity as a stock repurchase.  The remaining amount of $0.6 million was recorded as a selling, general and administrative expense in the Company’s condensed consolidated statements of operations and comprehensive loss.

Business_Segments_and_Signific

Business Segments and Significant Customers	9 Months Ended
	Sep. 30, 2013
Business Segments and Significant Customers	'
Business Segments and Significant Customers	'
	Note 5. Business Segments and Significant Customers
	The Company operates in one business segment and uses one measurement of profitability for its business.  Net revenue attributed to the United States and to all foreign countries is based on the geographical location of the customer.
	The Company recognized net revenue from customers in North America, Asia and Europe as follows (in thousands):
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2013			2012			2013		2012
	Taiwan	$	375		$	473		$	1,422	$	1,244
	North America	349			600			1,007		2,217
	Japan	217			247			956		940
	Rest of Asia	16			—			27		—
	Europe	—			7			—		86
	Total net revenue	$	957		$	1,327		$	3,412	$	4,487
	Customers who accounted for at least 10% of total net revenues were as follows:
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2013		2012		2013		2012
	Customer A	39	%	36	%	41	%	27	%
	Customer B	13	%	34	%	12	%	32	%
	Customer C	11	%	*		*		*
	*Represents percentages less than 10%
	Two customers accounted for 100% of net accounts receivable at September 30, 2013. Three customers accounted for 100% of net accounts receivable at December 31, 2012.

Income_Tax_Provision

Income Tax Provision	9 Months Ended
	Sep. 30, 2013
Income Tax Provision	'
Income Tax Provision	'
	Note 6. Income Tax Provision
	The Company determines deferred tax assets and liabilities based upon the differences between the financial statement and tax bases of the Company’s assets and liabilities using tax rates in effect for the year in which the Company expects the differences to affect taxable income. A valuation allowance is established for any deferred tax assets for which it is more likely than not that all or a portion of the deferred tax assets will not be realized.
	The Company files U.S. federal and state and foreign income tax returns in jurisdictions with varying statutes of limitations.  The Company is currently under tax examination in India.  The 2003 through 2012 tax years generally remain subject to examination by federal, state and foreign tax authorities.  As of September 30, 2013, the Company has not recorded any liability for unrecognized tax benefits related to uncertain tax positions.

StockBased_Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2013
Stock-Based Compensation	'
Stock-Based Compensation	'
	Note 7. Stock-Based Compensation
	The Company recorded $1.0 million and $0.9 million of stock-based compensation expense for the three months ended September 30, 2013 and 2012, respectively. The Company recorded $2.8 million and $3.0 million of stock-based compensation expense for the nine months ended September 30, 2013 and 2012, respectively. The expense relating to stock-based awards is recognized on a straight-line basis over the requisite service period, usually the vesting period, based on the grant-date fair value. The unamortized compensation cost, net of expected forfeitures, as of September 30, 2013 was $6.1 million and is expected to be recognized as expense over a weighted average period of approximately 2.69 years.
	The Company presents the tax benefits resulting from tax deductions in excess of the compensation cost recognized from the exercise of stock options as financing cash flows in the condensed consolidated statements of cash flows. For the three and nine months ended September 30, 2013 and 2012, there were no such tax benefits associated with the exercise of stock options due to the Company’s loss position.
	Common Stock Options and Restricted Stock
	A summary of the option activity under the Company’s Amended and Restated 2000 Stock Option and Equity Incentive Plan (Amended 2000 Plan) and 2010 Equity Incentive Plan (2010 Plan), referred to collectively as the “Plans,” is presented below (in thousands, except exercise price):
				Options Outstanding
		Available		Number of		Weighted
		for Grant		Shares		Average
						Exercise
						Prices
	Balance at December 31, 2012	1,265		6,872		$	4.05
	Additional shares authorized under the 2010 Plan	500		—		—
	Options granted	(176	)	176		$	3.48
	Options cancelled	471		(471	)	$	5.48
	Options exercised	—		(169	)	$	2.8
	Options expired	(378	)	—		5.78
	Balance at March 31, 2013	1,682		6,408		$	3.97
	Options granted	(1,140	)	1,140		$	4.46
	Restricted stock units granted	(35	)	—		$	—
	Options cancelled	113		(113	)	$	7.04
	Options exercised	—		(69	)	$	3.34
	Options expired	(91	)	—		7.85
	Balance at June 30, 2013	529		7,366		$	3.98
	Options granted	(228	)	228		$	3.98
	Options cancelled	469		(469	)	$	6.15
	Options exercised	—		(117	)	$	2.66
	Options expired	(350	)	—		6.8
	Balance at September 30, 2013	420		7,008		$	3.88
	The Company also has awarded options to new employees outside of the Plans and may continue to do so, as material inducements to the acceptance of employment with the Company, as permitted under the Listing Rules of the Nasdaq Stock Market. These grants must be approved by the compensation committee of the board of directors, a majority of the independent directors or, below a specified share level, by an authorized executive officer.
	A summary of the inducement grant option activity is presented below (in thousands, except exercise price):
		Options Outstanding
		Number of		Weighted
		Shares		Average
				Exercise
				Prices
	Balance at December 31, 2012	3,358		$	4.29
	Granted	151		$	4.21
	Cancelled	(1	)	$	1.5
	Exercised	(94	)	$	1.55
	Balance at March 31, 2013	3,414		$	4.37
	Exercised	(31	)	$	1.54
	Balance at June 30, 2013	3,383		$	4.39
	Granted	136		$	3.59
	Exercised	(32	)	$	1.54
	Balance at September 30, 2013	3,487		$	4.39
	A summary of restricted stock unit activity under the Plans is presented below (in thousands, except fair value):
		Number of		Weighted
		Shares		Average
				Grant-Date
				Fair Value
	Non-vested shares at March 31, 2013	—		$	—
	Restricted stock units granted	35		$	4.46
	Non-vested shares at June 30, 2013	35		$	4.46
	Vested	(8	)	$	4.46
	Non-vested shares at September 30, 2013	27		$	4.46
	The following table summarizes significant ranges of outstanding and exercisable options as of September 30, 2013 (in thousands, except contractual life and exercise price):
		Options Outstanding									Options Exercisable
	Range of Exercise Price	Number		Weighted		Weighted			Aggregate		Number	Weighted	Weighted		Aggregate
		Outstanding		Average		Average			Intrinsic		Exercisable	Average	Average		Intrinsic
				Remaining		Exercise			value			Remaining	Exercise		value
				Contractual		Price						Contractual	Price
				Life								Life (in
				(in Years)								Years)
$1.50 - $3.23	3,009		3.47		$	2.57		$	3,459	1,874	2.77	$	2.25	$	2,749
$3.24 - $4.25	2,771		4.16		$	3.8		186		1,514	3.4	$	3.84	76
$4.26 - $5.61	3,759		3.95		$	4.9		—		2,545	1.75	$	5.1	—
$5.62 - $9.00	956		3.07		$	6.07		—		662	2.84	$	6.1	—
	10,495		3.79		$	4.05		$	3,645	6,595	2.53	$	4.1	$	2,825
As of September 30, 2013, the Company had 9.9 million shares subject to outstanding options fully vested and expected to vest, after estimated forfeitures, with a remaining contractual life of 3.63 years, weighted average exercise price of $4.06 and aggregate intrinsic value of $3.5 million.
The total fair value of shares subject to outstanding options vested during the nine months ended September 30, 2013 and 2012 calculated using the Black-Scholes valuation method was $2.5 million and $1.7 million, respectively. The total intrinsic value of employee stock options exercised during the nine months ended September 30, 2013 and 2012 was $0.8 million and $2.3 million, respectively.
Options to purchase 6.2 million shares with a weighted average exercise price of $4.43 per share were exercisable at September 30, 2012.
Valuation Assumptions and Expense Information
The fair value of the Company’s share-based payment awards for the three and nine months ended September 30, 2013 and 2012 was estimated on the grant date using a Black-Scholes valuation option-pricing model with the following assumptions:
	Three Months Ended				Nine Months Ended
	September 30,				September 30,
Employee stock options:	2013		2012		2013		2012
Risk-free interest rate	1.0% - 1.7%		0.2% - 0.6%		0.5% – 1.7%		0.2% – 0.8%
Volatility	57.7% – 62.9%		65.2% – 73.1%		57.7% – 62.9%		65.2% – 73.1%
Expected life (years)	4.0-5.0		4		4.0-5.0		4
Dividend yield	0%		0%		0%		0%
The risk-free interest rate was derived from the Daily Treasury Yield Curve Rates as published by the U.S. Department of the Treasury as of the grant date for terms equal to the expected terms of the options. The expected volatility was based on the historical volatility of the Company’s stock price over the expected term of the options. The expected term of options granted was derived from historical data based on employee exercises and post-vesting employment termination behavior. A dividend yield of zero is applied because the Company has never paid dividends and has no intention to pay dividends in the near future.
The stock-based compensation expense recorded is adjusted based on estimated forfeiture rates. An annualized forfeiture rate has been used as a best estimate of future forfeitures based on the Company’s historical forfeiture experience. The stock-based compensation expense will be adjusted in later periods if the actual forfeiture rate is different from the estimate.
Employee Stock Purchase Plan
In June 2010, the Company’s stockholders approved the 2010 Employee Stock Purchase Plan (ESPP). A total of 2,000,000 shares of common stock have been reserved for issuance under the ESPP. The ESPP, which is intended to qualify under Section 423 of the Internal Revenue Code, is administered by the board of directors or the compensation committee of the board of directors. The ESPP provides that eligible employees may purchase up to $25,000 worth of the Company’s common stock annually over the course of two six-month offering periods. The purchase price to be paid by participants is 85% of the price per share of the Company’s common stock either at the beginning or the end of each six-month offering period, whichever is less. On September 1, 2010, the Company commenced the first offering period under the ESPP. On February 28, 2013, approximately 147,000 shares of common stock were issued at an aggregate purchase price of $426,000 under the ESPP.  On August 30, 2013, approximately 128,000 shares of common stock were issued at an aggregate purchase price of $381,000 under the ESPP.  As of September 30, 2013, there were approximately 1,061,000 shares authorized and unissued under the ESPP.

Stockholders_Equity

Stockholder's Equity	9 Months Ended
	Sep. 30, 2013
Stockholder's Equity	'
Stockholder's Equity	'
	Note 8. Stockholder’s Equity
	In the second quarter of 2013, the Company completed a public offering and issued approximately 7.5 million shares of its common stock for approximately $27.7 million in net proceeds.  The Company’s chief executive officer purchased 250,000 shares at the public offering price.

Related_Party_Transactions

Related Party Transactions	9 Months Ended
	Sep. 30, 2013
Related Party Transactions	'
Related Party Transactions	'
	Note 9. Related Party Transactions
	In February 2012, the Company entered into a strategic development and marketing agreement with Credo Semiconductor (Hong Kong) Ltd. (Credo), a privately-funded, fabless semiconductor company, to develop, market and sell integrated circuits. Two of the Company’s executive officers between them loaned a total of $250,000 to Credo for a portion of the seed funding needed by Credo to commence its integrated circuit design efforts.  These loans may be converted into minority equity interests in Credo. The agreement calls for the Company to pay approximately $1.4 million to Credo upon Credo achieving certain development and verification milestones towards the development of IC products and provides the Company with exclusive sales and marketing rights for such IC products. In 2012, Credo achieved a number of the milestones set forth in the agreement, and the Company paid Credo $1.1 million. In the first nine months of 2013, the Company paid Credo an additional $1.2 million for achievement of additional development milestones, as well as for mask costs and wafer purchases from third-party vendors.  All amounts incurred have been recorded as research and development expense.  As of September 30, 2013, the first $1.9 million of gross profits generated by the sale of these integrated circuits will be retained by the Company, and, thereafter, the gross profits will be shared equally.  In the first half of 2013, the Company announced the availability of prototype samples of the LineSpeed products developed pursuant to the strategic development and marketing agreement.  In October 2013, the Company agreed to pay Credo an additional $0.6 million for further product development work.

The_Company_and_Summary_of_Sig1

The Company and Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2013
The Company and Summary of Significant Accounting Policies	'
Basis of Presentation	'
	Basis of Presentation
	The condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All significant intercompany transactions and balances have been eliminated in consolidation. The Company’s fiscal year is the calendar year.
Reclassification	'
	Reclassification
	Certain prior year amounts have been reclassified to conform to the current year presentation. The reclassification includes reclassifying unbilled contracts receivable into the prepaid expenses and other current assets line item of the condensed consolidated balance sheets. The amount for the prior period has been reclassified to be consistent with the current year presentation and has no impact on previously reported total assets, total stockholders’ equity, net loss or comprehensive loss.
Use of Estimates	'
	Use of Estimates
	The preparation of financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and reported amounts of revenues and expenses recognized during the reported period. Actual results could differ from those estimates.
Cash Equivalents and Investments	'
	Cash Equivalents and Investments
	The Company has invested its excess cash in money market accounts, certificates of deposit, corporate debt, government agency and municipal debt securities and considers all highly liquid debt instruments purchased with an original maturity of three months or less to be cash equivalents. Investments with original maturities greater than three months and remaining maturities less than one year are classified as short-term investments. Investments with remaining maturities greater than one year are classified as long-term investments. Management generally determines the appropriate classification of securities at the time of purchase. All securities are classified as available-for-sale. The Company’s available-for-sale short-term and long-term investments are carried at fair value, with the unrealized holding gains and losses reported in accumulated other comprehensive income. Realized gains and losses and declines in the value judged to be other than temporary are included in the other income, net line item in the condensed consolidated statements of operations and comprehensive loss. The cost of securities sold is based on the specific identification method.
Fair Value Measurements	'
	Fair Value Measurements
	The Company measures the fair value of financial instruments using a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value into three broad levels, as follows:
	Level 1— Inputs used to measure fair value are unadjusted quoted prices that are available in active markets for the identical assets or liabilities as of the reporting date.
	Level 2— Pricing is provided by third party sources of market information obtained through the Company’s investment advisors rather than models. The Company does not adjust for or apply any additional assumptions or estimates to the pricing information it receives from advisors. The Company’s Level 2 securities include cash equivalents and available-for-sale securities, which consisted primarily of certificates of deposit, corporate debt, and government agency and municipal debt securities from issuers with high quality credit ratings. The Company’s investment advisors obtain pricing data from independent sources, such as Standard & Poor’s, Bloomberg and Interactive Data Corporation, and rely on comparable pricing of other securities because the Level 2 securities are not actively traded and have fewer observable transactions. The Company considers this the most reliable information available for the valuation of the securities.
	Level 3— Unobservable inputs that are supported by little or no market activity and reflect the use of significant management judgment are used to measure fair value. These values are generally determined using pricing models for which the assumptions utilize management’s estimates of market participant assumptions. The determination of fair value for Level 3 investments and other financial instruments involves the most management judgment and subjectivity.
Allowance for Doubtful Accounts	'
	Allowance for Doubtful Accounts
	The Company establishes an allowance for doubtful accounts to ensure that its trade receivables balances are not overstated due to uncollectibility. The Company performs ongoing customer credit evaluations within the context of the industry in which it operates and generally does not require collateral from its customers. A specific allowance of up to 100% of the invoice value is provided for any problematic customer balances. Delinquent account balances are written off after management has determined that the likelihood of collection is remote. The Company grants credit only to customers deemed creditworthy in the judgment of management. There was no allowance for doubtful accounts receivable at September 30, 2013 or December 31, 2012.
Revenue Recognition	'
	Revenue Recognition
	General
	The Company generates revenue from the licensing of its IP and sales of IC products. The Company recognizes revenue when persuasive evidence of an arrangement exists, delivery or performance has occurred, the sales price is fixed or determinable, and collectibility is reasonably assured. Evidence of an arrangement generally consists of signed agreements or customer purchase orders.
	Licensing
	Licensing revenue consists of fees earned from license agreements, development services and support and maintenance. For stand-alone license agreements or license deliverables in multi-deliverable arrangements that do not require significant development, modification or customization, revenues are recognized when all revenue recognition criteria have been met. Delivery of the licensed technology is typically the final revenue recognition criterion met, at which time revenue is recognized. If any of the criteria are not met, revenue recognition is deferred until such time as all criteria have been met.
	When sales arrangements contain multiple deliverables (e.g., license and services), the Company reviews each deliverable to determine the separate units of accounting that exist within the agreement. If more than one unit of accounting exists, the consideration payable to the Company under the agreement is allocated to each unit of accounting using the relative fair value method. Revenue is recognized for each unit of accounting when the revenue recognition criteria have been met for that unit of accounting. The Company allocates revenue among the deliverables using the relative selling price method. Revenue allocated to each element is recognized when the basic revenue recognition criteria is met for each element. Under GAAP, the Company is required to apply a hierarchy to determine the selling price to be used for allocating revenue to deliverables: (i) vendor-specific objective evidence of fair value (VSOE), (ii) third-party evidence of selling price (TPE) and (iii) best estimate of the selling price (ESP). In general, the Company is unable to establish VSOE or TPE for license fees and development services. Therefore revenue is allocated to these elements based on the Company’s ESP, which the Company determines after considering multiple factors such as management approved pricing guidelines, geographic differences, market conditions, competitor pricing strategies, internal costs and gross margin objectives. These factors may vary over time depending upon the unique facts and circumstances related to each deliverable. If the facts and circumstances underlying the factors considered change or should future facts and circumstances lead the Company to consider additional factors, the Company’s ESP for license fee and development services could change.
	For license agreements involving deliverables that do require significant production, modification or customization, and where the Company has significant experience in meeting the design specifications in the contract and the direct labor hours related to services under the contract can be reasonably estimated, the Company recognizes revenue over the period in which the contract services are performed. For these arrangements, the Company recognizes revenue using the percentage of completion method. Under this method, revenue recognized in any period depends on the Company’s progress toward completion of projects in progress. Significant management judgment and discretion are used to estimate total direct labor hours. These judgmental elements include determining that the Company has the experience to meet the design specifications and estimate the total direct labor hours to perform the contract services, based on experience in developing prior licensees’ designs. The direct labor hours for the development of the licensee’s design are estimated at the beginning of the contract. As the direct labor hours are incurred, they are used as a measure of progress towards completion. During the contract performance period, the Company reviews estimates of direct labor hours to complete the contracts and will revise its estimates of revenue and gross profit under the contract if it revises the estimations of the direct labor hours to complete. The Company’s policy is to reflect any revision in the contract gross profit estimate in reported income or loss in the period in which the facts giving rise to the revision become known. Under the percentage of completion method, provisions for estimated losses on uncompleted contracts are recorded in the period in which such losses are determined to be likely.
	The Company provides support and maintenance under many of its license agreements. Under these arrangements, the Company provides unspecified upgrades, design rule changes and technical support. No other upgrades, products or other post-contract support are provided. Support and maintenance revenue is recognized at its fair value established by VSOE, ratably over the period during which the obligation exists, typically 12 months. These arrangements are generally renewable annually by the customer.
	Royalty
	The Company’s licensing contracts typically also provide for royalties based on licensees’ use of the Company’s memory technology in their currently shipping commercial products. The Company recognizes royalties in the quarter in which it receives the licensee’s report. Under limited circumstances, the Company may also recognize prepaid post-production royalties as revenue upon execution of the contract, which are paid in a lump sum after the licensee commences production of the royalty-bearing product and applied against future unit shipments regardless of the actual level of shipments by the licensee. The criteria for revenue recognition of prepaid royalties are that a formal agreement with the licensee is executed, no deliverables, development or support services related to prepaid royalties are required, the fees are non-refundable and not contingent upon future product shipments by the licensee, and the fees are payable by the licensee in a time period consistent with the Company’s normal billing terms. If any of these criteria are not met, the Company defers revenue recognition until such time as all criteria have been met.
	IC products
	The Company sells products both directly to customers, as well as through distributors. Revenue from sales directly to customers is generally recognized at the time of shipment. The Company records an estimated allowance, at the time of shipment, for future returns and other charges against revenue consistent with the terms of sale. IC product revenue and costs relating to sales made through distributors with rights of return and stock rotation are deferred until the distributors sell the product to end customers due to the Company’s inability to estimate future returns and credits to be issued. Distributors are generally able to return up to 10% of their purchases for slow, non-moving or obsolete inventory for credit every six months. At the time of shipment to distributors, an accounts receivable for the selling price is recorded, as there is a legally enforceable right to receive payment, and inventory is relieved, as legal title to the inventory is transferred upon shipment. Revenues are recognized upon receiving notification from the distributors that products have been sold to end customers. Distributors provide information regarding products and quantity, end customer shipments and remaining inventory on hand. The associated deferred margin is included in the deferred revenues line item in the condensed consolidated balance sheet. The Company recorded initial IC product revenue in 2012, and a significant reserve for returns has been recorded due to the product’s early stage of testing and deployment in customer systems. IC product revenue was not significant for the three and nine months ended September 30, 2013 and 2012, and has been included in the licensing and other revenue line item in the condensed consolidated statements of operations and comprehensive loss.
Cost of Revenue	'
	Cost of Revenue
	Cost of licensing and other revenue consists primarily of direct and indirect costs of IC product sales and engineering personnel costs directly related to maintenance and support services specified in licensing agreements.  Maintenance and support typically includes engineering support to assist in the commencement of production of a licensee’s products.
Goodwill	'
	Goodwill
	The Company reviews goodwill for impairment on an annual basis or whenever events or changes in circumstances indicate the carrying value of an asset may not be recoverable. The Company first assesses qualitative factors to determine whether it is more-likely-than-not that the fair value of the reporting unit is less than the carrying amount as a basis for determining whether it is necessary to perform the two-step impairment test. If the qualitative assessment warrants further analysis, the Company compares the fair value of the reporting unit to its carrying value. The fair value of the reporting unit is determined using the market approach. If the fair value of the reporting unit exceeds the carrying value of net assets of the reporting unit, goodwill is not impaired, and the Company is not required to perform further testing. If the carrying value of the reporting unit’s goodwill exceeds its implied fair value, then the Company must record an impairment charge equal to the difference. The Company has determined that it has a single reporting unit for purposes of performing its goodwill impairment test. As the Company used the market approach to assess impairment in the second step of the analysis, the price of its common stock is an important component of the fair value calculation. If the Company’s stock price continues to experience significant price and volume fluctuations, this will impact the fair value of the reporting unit, which can lead to potential impairment in future periods. The Company performed step one of the annual impairment test in September 2013, and determined that its goodwill was not impaired.
Intangible Assets	'
	Intangible Assets
	Intangible assets acquired in business combinations are accounted for based on the fair value of assets purchased and are amortized over the period in which economic benefit is estimated to be received. Identifiable intangible assets were as follows (dollar amounts in thousands):
		September 30, 2013
		Life	Gross		Accumulated		Net
		(years)	Carrying		Amortization		Carrying
			Amount				Value
	Developed technology	5-Mar	$	9,240	$	7,921	$	1,319
	Patent license	7	780		195		585
	Total		$	10,020	$	8,116	$	1,904
		December 31, 2012
		Life	Gross		Accumulated		Net
		(years)	Carrying		Amortization		Carrying
			Amount				Value
	Developed technology	5-Mar	$	9,240	$	7,255	$	1,985
	Customer relationships	3	390		390		—
	Subtotal purchased intangible assets		9,630		7,645		1,985
	Patent license	7	780		111		669
	Total		$	10,410	$	7,756	$	2,654
	The related amortization expense was $0.3 million for each of the three months ended September 30, 2013 and 2012. The related amortization expense was $0.8 million and $1.5 million for the nine months ended September 30, 2013 and 2012, respectively. Amortization expense has been included in research and development expense in the condensed consolidated statements of operations and comprehensive loss.  The estimated aggregate amortization expense to be recognized in future years is approximately $0.3 million for the remainder of 2013, $1.0 million for 2014, $0.3 million for 2015 and $0.1 million annually for 2016 through 2018.
Per Share Amounts	'
	Per Share Amounts
	Basic net loss per share is computed by dividing net loss for the period by the weighted-average number of shares of common stock outstanding during the period. Diluted net loss per share gives effect to all potentially dilutive common shares outstanding during the period. Potentially dilutive common shares consist of incremental shares of common stock issuable upon the exercise of stock options, vesting of stock awards and purchases under the employee stock purchase plan. As of September 30, 2013 and 2012, stock awards to purchase approximately 10,662,000 and 10,990,000 shares, respectively, were excluded from the computation of diluted net loss per share as their inclusion would be anti-dilutive.
Comprehensive Loss	'
	Comprehensive Loss
	Comprehensive loss includes unrealized gains and losses on available-for-sale securities.  Realized gains and losses on available-for-sale securities are reclassified from accumulated other comprehensive loss and included in other income, net in the condensed consolidated statements of operations and comprehensive loss.

The_Company_and_Summary_of_Sig2

The Company and Summary of Significant Accounting Policies (Tables)	9 Months Ended
	Sep. 30, 2013
The Company and Summary of Significant Accounting Policies	'
Schedule of identifiable intangible assets	'
	Intangible assets acquired in business combinations are accounted for based on the fair value of assets purchased and are amortized over the period in which economic benefit is estimated to be received. Identifiable intangible assets were as follows (dollar amounts in thousands):
		September 30, 2013
		Life	Gross		Accumulated		Net
		(years)	Carrying		Amortization		Carrying
			Amount				Value
	Developed technology	5-Mar	$	9,240	$	7,921	$	1,319
	Patent license	7	780		195		585
	Total		$	10,020	$	8,116	$	1,904
		December 31, 2012
		Life	Gross		Accumulated		Net
		(years)	Carrying		Amortization		Carrying
			Amount				Value
	Developed technology	5-Mar	$	9,240	$	7,255	$	1,985
	Customer relationships	3	390		390		—
	Subtotal purchased intangible assets		9,630		7,645		1,985
	Patent license	7	780		111		669
	Total		$	10,410	$	7,756	$	2,654

Fair_Value_of_Financial_Instru1

Fair Value of Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2013
Fair Value of Financial Instruments	'
Schedule of estimated fair values of financial instruments outstanding	'
	The estimated fair values of financial instruments outstanding were as follows (in thousands):
		September 30, 2013
		Cost		Unrealized			Unrealized			Fair
				Gains			Losses			Value
	Cash and cash equivalents	$	2,174	$	—		$	—		$	2,174
	Short-term investments:
	U.S. government debt securities	$	20,753	$	12		$	(3	)	$	20,762
	Corporate notes	7,643		2			(1		)	7,644
	Certificates of deposit	5,005		1			(3		)	5,003
	Total short-term investments	$	33,401	$	15		$	(7	)	$	33,409
	Long-term investments:
	U.S. government debt securities	$	5,220	$	3		$	(1	)	$	5,222
	Corporate notes	10,307		1			(13		)	10,295
	Certificates of deposit	2,160		1			(7		)	2,154
	Total long-term investments	$	17,687	$	5		$	(21	)	$	17,671
		December 31, 2012
		Cost		Unrealized			Unrealized			Fair
				Gains			Losses			Value
	Cash and cash equivalents	$	2,529	$	—		$	—		$	2,529
	Short-term investments:
	U.S. government debt securities	$	15,852	$	6		$	(2	)	$	15,856
	Corporate notes	14,471		8			(4		)	14,475
	Certificates of deposit	467		—			—			467
	Total short-term investments	$	30,790	$	14		$	(6	)	$	30,798
	Long-term investments:
	U.S. government debt securities	$	6,330	$	2		$	—		$	6,332
	Corporate notes	1,050		1			—			1,051
	Total long-term investments	$	7,380	$	3		$	—		$	7,383
Schedule of estimated fair values of available-for-sale securities with unrealized losses	'
	The estimated fair values of available-for-sale securities with unrealized losses were as follows (in thousands):
		September 30, 2013
		Cost		Unrealized			Fair
				Losses			Value
	Short-term investments:
	U.S. government debt securities	$	2,041	$	(3	)	$	2,038
	Corporate notes	3,270		(1		)	3,269
	Certificates of deposit	3,320		(3		)	3,317
	Total short-term investments	$	8,631	$	(7	)	$	8,624
	Long-term investments:
	U.S. government debt securities	$	3,758	$	(1	)	$	3,757
	Corporate notes	9,286		(13		)	9,273
	Certificates of deposit	1,680		(7		)	1,673
	Total long-term investments	$	14,724	$	(21	)	$	14,703
		December 31, 2012
		Cost		Unrealized			Fair
				Losses			Value
	Short-term investments:
	U.S. government debt securities	$	2,546	$	(2	)	$	2,544
	Corporate notes	5,668		(4		)	5,664
	Total short-term investments	$	8,214	$	(6	)	$	8,208
Schedule of cost and fair value of investments based on maturity groups	'
	Cost and fair value of investments based on two maturity groups were as follows (in thousands):
		September 30, 2013
		Cost		Unrealized			Unrealized			Fair
				Gains			Losses			Value
	Due within 1 year	$	33,401	$	15		$	(7	)	$	33,409
	Due in 1-2 years	17,687		5			(21		)	17,671
	Total	$	51,088	$	20		$	(28	)	$	51,080
		December 31, 2012
		Cost		Unrealized			Unrealized			Fair
				Gains			Losses			Value
	Due within 1 year	$	30,790	$	14		$	(6	)	$	30,798
	Due in 1-2 years	7,380		3			—			7,383
	Total	$	38,170	$	17		$	(6	)	$	38,181
Schedule of fair value hierarchy for financial assets (cash equivalents and investments)	'
	The following table represents the Company’s fair value hierarchy for its financial assets (cash equivalents and investments) as of September 30, 2013 and December 31, 2012 (in thousands):
		September 30, 2013
		Fair Value		Level 1			Level 2			Level 3
	Money market funds	$	1,682	$	1,682		$	—		$	—
	Certificates of deposit	7,397		—			7,397			—
	Corporate notes	17,939		—			17,939			—
	U.S. government debt securities	25,984		—			25,984			—
	Total assets	$	53,002	$	1,682		$	51,320		$	—
		December 31, 2012
		Fair Value		Level 1			Level 2			Level 3
	Money market funds	$	1,407	$	1,407		$	—		$	—
	U.S. government debt securities	22,289		—			22,289			—
	Corporate notes	16,226		—			16,226			—
	Certificates of deposit	467		—			467			—
	Total assets	$	40,389	$	1,407		$	38,982		$	—

Business_Segments_and_Signific1

Business Segments and Significant Customers (Tables)	9 Months Ended
	Sep. 30, 2013
Business Segments and Significant Customers	'
Schedule of net revenue from customers in North America, Asia and Europe	'
	The Company recognized net revenue from customers in North America, Asia and Europe as follows (in thousands):
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2013			2012			2013		2012
	Taiwan	$	375		$	473		$	1,422	$	1,244
	North America	349			600			1,007		2,217
	Japan	217			247			956		940
	Rest of Asia	16			—			27		—
	Europe	—			7			—		86
	Total net revenue	$	957		$	1,327		$	3,412	$	4,487
Schedule of customers who accounted for at least 10% of total net revenues	'
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2013		2012		2013		2012
	Customer A	39	%	36	%	41	%	27	%
	Customer B	13	%	34	%	12	%	32	%
	Customer C	11	%	*		*		*
	*Represents percentages less than 10%

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2013
Stock-Based Compensation	'
Summary of the option activity under the Company's Amended and Restated 2000 Stock Option and Equity Incentive Plan (Amended 2000 Plan) and 2010 Equity Incentive Plan (2010 Plan), referred to collectively as the "Plans,"	'
	A summary of the option activity under the Company’s Amended and Restated 2000 Stock Option and Equity Incentive Plan (Amended 2000 Plan) and 2010 Equity Incentive Plan (2010 Plan), referred to collectively as the “Plans,” is presented below (in thousands, except exercise price):
				Options Outstanding
		Available		Number of		Weighted
		for Grant		Shares		Average
						Exercise
						Prices
	Balance at December 31, 2012	1,265		6,872		$	4.05
	Additional shares authorized under the 2010 Plan	500		—		—
	Options granted	(176	)	176		$	3.48
	Options cancelled	471		(471	)	$	5.48
	Options exercised	—		(169	)	$	2.8
	Options expired	(378	)	—		5.78
	Balance at March 31, 2013	1,682		6,408		$	3.97
	Options granted	(1,140	)	1,140		$	4.46
	Restricted stock units granted	(35	)	—		$	—
	Options cancelled	113		(113	)	$	7.04
	Options exercised	—		(69	)	$	3.34
	Options expired	(91	)	—		7.85
	Balance at June 30, 2013	529		7,366		$	3.98
	Options granted	(228	)	228		$	3.98
	Options cancelled	469		(469	)	$	6.15
	Options exercised	—		(117	)	$	2.66
	Options expired	(350	)	—		6.8
	Balance at September 30, 2013	420		7,008		$	3.88
Summary of the inducement grant option activity	'
	A summary of the inducement grant option activity is presented below (in thousands, except exercise price):
		Options Outstanding
		Number of		Weighted
		Shares		Average
				Exercise
				Prices
	Balance at December 31, 2012	3,358		$	4.29
	Granted	151		$	4.21
	Cancelled	(1	)	$	1.5
	Exercised	(94	)	$	1.55
	Balance at March 31, 2013	3,414		$	4.37
	Exercised	(31	)	$	1.54
	Balance at June 30, 2013	3,383		$	4.39
	Granted	136		$	3.59
	Exercised	(32	)	$	1.54
	Balance at September 30, 2013	3,487		$	4.39
Summary of restricted stock unit activity under the Plans	'
	A summary of restricted stock unit activity under the Plans is presented below (in thousands, except fair value):
		Number of		Weighted
		Shares		Average
				Grant-Date
				Fair Value
	Non-vested shares at March 31, 2013	—		$	—
	Restricted stock units granted	35		$	4.46
	Non-vested shares at June 30, 2013	35		$	4.46
	Vested	(8	)	$	4.46
	Non-vested shares at September 30, 2013	27		$	4.46
Summary of significant ranges of outstanding and exercisable options, excluding restricted stock award and restricted stock unit activity	'
	The following table summarizes significant ranges of outstanding and exercisable options as of September 30, 2013 (in thousands, except contractual life and exercise price):
		Options Outstanding									Options Exercisable
	Range of Exercise Price	Number		Weighted		Weighted			Aggregate		Number	Weighted	Weighted		Aggregate
		Outstanding		Average		Average			Intrinsic		Exercisable	Average	Average		Intrinsic
				Remaining		Exercise			value			Remaining	Exercise		value
				Contractual		Price						Contractual	Price
				Life								Life (in
				(in Years)								Years)
	$1.50 - $3.23	3,009		3.47		$	2.57		$	3,459	1,874	2.77	$	2.25	$	2,749
	$3.24 - $4.25	2,771		4.16		$	3.8		186		1,514	3.4	$	3.84	76
	$4.26 - $5.61	3,759		3.95		$	4.9		—		2,545	1.75	$	5.1	—
	$5.62 - $9.00	956		3.07		$	6.07		—		662	2.84	$	6.1	—
		10,495		3.79		$	4.05		$	3,645	6,595	2.53	$	4.1	$	2,825
Schedule of assumptions used in estimation of fair value of the share-based payment awards on the grant date	'
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
	Employee stock options:	2013		2012		2013		2012
	Risk-free interest rate	1.0% - 1.7%		0.2% - 0.6%		0.5% – 1.7%		0.2% – 0.8%
	Volatility	57.7% – 62.9%		65.2% – 73.1%		57.7% – 62.9%		65.2% – 73.1%
	Expected life (years)	4.0-5.0		4		4.0-5.0		4
	Dividend yield	0%		0%		0%		0%

The_Company_and_Summary_of_Sig3

The Company and Summary of Significant Accounting Policies (Details) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
	GB
The Company and Summary of Significant Accounting Policies	'	'
Speed per second of high-speed interface technology of Bandwidth Engine ICs (in gigabits)	10	'
Allowance for Doubtful Accounts	'	'
Maximum specific allowance as percentage of invoice value for problematic customer balances	100.00%	'
Allowance for doubtful accounts receivable	$0	$0

The_Company_and_Summary_of_Sig4

The Company and Summary of Significant Accounting Policies (Details 2) (USD $)

3 Months Ended

9 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

12 Months Ended

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Purchased intangible assets

Developed technology

Developed technology

Developed technology

Developed technology

Developed technology

Developed technology

Customer relationships

Patent license

Patent license

Minimum

Minimum

Maximum

Maximum

Revenue Recognition

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Support and maintenance revenue recognition period based on fair value established by VSOE

'

'

'12 months

'

'

'

'

'

'

'

'

'

'

'

'

Threshold purchase return percentage by distributors for slow, non-moving or obsolete inventory

'

'

10.00%

'

'

'

'

'

'

'

'

'

'

'

'

Specified period for return of threshold percentage of purchases by distributors for slow, non-moving or obsolete inventory

'

'

'6 months

'

'

'

'

'

'

'

'

'

'

'

'

Intangible assets

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Life

'

'

'

'

'

'

'

'

'3 years

'3 years

'5 years

'5 years

'3 years

'7 years

'7 years

Gross Carrying Amount

$10,020,000

'

$10,020,000

'

$10,410,000

$9,630,000

$9,240,000

$9,240,000

'

'

'

'

$390,000

$780,000

$780,000

Accumulated Amortization

8,116,000

'

8,116,000

'

7,756,000

7,645,000

7,921,000

7,255,000

'

'

'

'

390,000

195,000

111,000

Net Carrying Value

1,904,000

'

1,904,000

'

2,654,000

1,985,000

1,319,000

1,985,000

'

'

'

'

'

585,000

669,000

Amortization expense

300,000

300,000

750,000

1,496,000

'

'

'

'

'

'

'

'

'

'

'

Estimated aggregate amortization expense to be recognized in future

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Remainder of 2013

300,000

'

300,000

'

'

'

'

'

'

'

'

'

'

'

'

2014

1,000,000

'

1,000,000

'

'

'

'

'

'

'

'

'

'

'

'

2015

300,000

'

300,000

'

'

'

'

'

'

'

'

'

'

'

'

2016 through 2018

$100,000

'

$100,000

'

'

'

'

'

'

'

'

'

'

'

'

Per Share Amounts

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Anti-dilutive securities excluded from computation of diluted net loss per share

'

'

10,662,000

10,990,000

'

'

'

'

'

'

'

'

'

'

'

Fair_Value_of_Financial_Instru2

Fair Value of Financial Instruments (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Fair Value of Financial Instruments	'	'	'	'
Cash and cash equivalents, cost	$2,174	$2,529	$5,967	$40,025
Cash and cash equivalents, fair value	2,174	2,529	'	'
Estimated fair values of financial instruments	'	'	'	'
Unrealized Gains	20	17	'	'
Unrealized Losses	-28	-6	'	'
Short-term investments	'	'	'	'
Estimated fair values of financial instruments	'	'	'	'
Cost	33,401	30,790	'	'
Unrealized Gains	15	14	'	'
Unrealized Losses	-7	-6	'	'
Fair Value	33,409	30,798	'	'
Short-term investments | U.S. government debt securities	'	'	'	'
Estimated fair values of financial instruments	'	'	'	'
Cost	20,753	15,852	'	'
Unrealized Gains	12	6	'	'
Unrealized Losses	-3	-2	'	'
Fair Value	20,762	15,856	'	'
Short-term investments | Corporate notes	'	'	'	'
Estimated fair values of financial instruments	'	'	'	'
Cost	7,643	14,471	'	'
Unrealized Gains	2	8	'	'
Unrealized Losses	-1	-4	'	'
Fair Value	7,644	14,475	'	'
Short-term investments | Certificates of deposit	'	'	'	'
Estimated fair values of financial instruments	'	'	'	'
Cost	5,005	467	'	'
Unrealized Gains	1	'	'	'
Unrealized Losses	-3	'	'	'
Fair Value	5,003	467	'	'
Long-term investments	'	'	'	'
Estimated fair values of financial instruments	'	'	'	'
Cost	17,687	7,380	'	'
Unrealized Gains	5	3	'	'
Unrealized Losses	-21	'	'	'
Fair Value	17,671	7,383	'	'
Long-term investments | U.S. government debt securities	'	'	'	'
Estimated fair values of financial instruments	'	'	'	'
Cost	5,220	6,330	'	'
Unrealized Gains	3	2	'	'
Unrealized Losses	-1	'	'	'
Fair Value	5,222	6,332	'	'
Long-term investments | Corporate notes	'	'	'	'
Estimated fair values of financial instruments	'	'	'	'
Cost	10,307	1,050	'	'
Unrealized Gains	1	1	'	'
Unrealized Losses	-13	'	'	'
Fair Value	10,295	1,051	'	'
Long-term investments | Certificates of deposit	'	'	'	'
Estimated fair values of financial instruments	'	'	'	'
Cost	2,160	'	'	'
Unrealized Gains	1	'	'	'
Unrealized Losses	-7	'	'	'
Fair Value	$2,154	'	'	'

Fair_Value_of_Financial_Instru3

Fair Value of Financial Instruments (Details 2) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
	Group
Estimated fair values of available-for-sale securities with unrealized losses	'	'
Number of maturity groups	2	'
Investments by rolling maturity, Cost	'	'
Due within 1 year	$33,401	$30,790
Due in 1-2 years	17,687	7,380
Total	51,088	38,170
Investments by rolling maturity, Unrealized Gains	'	'
Due within 1 year	15	14
Due in 1-2 years	5	3
Total	20	17
Investments by rolling maturity, Unrealized Losses	'	'
Due within 1 year	-7	-6
Due in 1-2 years	-21	'
Total	-28	-6
Investments by rolling maturity, Fair Value	'	'
Due within 1 year	33,409	30,798
Due in 1-2 years	17,671	7,383
Total	51,080	38,181
Short-term investments	'	'
Estimated fair values of available-for-sale securities with unrealized losses	'	'
Cost	8,631	8,214
Unrealized Losses	-7	-6
Fair Value	8,624	8,208
Investments by rolling maturity, Unrealized Gains	'	'
Total	15	14
Investments by rolling maturity, Unrealized Losses	'	'
Total	-7	-6
Short-term investments | U.S. government debt securities	'	'
Estimated fair values of available-for-sale securities with unrealized losses	'	'
Cost	2,041	2,546
Unrealized Losses	-3	-2
Fair Value	2,038	2,544
Investments by rolling maturity, Unrealized Gains	'	'
Total	12	6
Investments by rolling maturity, Unrealized Losses	'	'
Total	-3	-2
Short-term investments | Corporate notes	'	'
Estimated fair values of available-for-sale securities with unrealized losses	'	'
Cost	3,270	5,668
Unrealized Losses	-1	-4
Fair Value	3,269	5,664
Investments by rolling maturity, Unrealized Gains	'	'
Total	2	8
Investments by rolling maturity, Unrealized Losses	'	'
Total	-1	-4
Short-term investments | Certificates of deposit	'	'
Estimated fair values of available-for-sale securities with unrealized losses	'	'
Cost	3,320	'
Unrealized Losses	-3	'
Fair Value	3,317	'
Investments by rolling maturity, Unrealized Gains	'	'
Total	1	'
Investments by rolling maturity, Unrealized Losses	'	'
Total	-3	'
Long-term investments	'	'
Estimated fair values of available-for-sale securities with unrealized losses	'	'
Cost	14,724	'
Unrealized Losses	-21	'
Fair Value	14,703	'
Investments by rolling maturity, Unrealized Gains	'	'
Total	5	3
Investments by rolling maturity, Unrealized Losses	'	'
Total	-21	'
Long-term investments | U.S. government debt securities	'	'
Estimated fair values of available-for-sale securities with unrealized losses	'	'
Cost	3,758	'
Unrealized Losses	-1	'
Fair Value	3,757	'
Investments by rolling maturity, Unrealized Gains	'	'
Total	3	2
Investments by rolling maturity, Unrealized Losses	'	'
Total	-1	'
Long-term investments | Corporate notes	'	'
Estimated fair values of available-for-sale securities with unrealized losses	'	'
Cost	9,286	'
Unrealized Losses	-13	'
Fair Value	9,273	'
Investments by rolling maturity, Unrealized Gains	'	'
Total	1	1
Investments by rolling maturity, Unrealized Losses	'	'
Total	-13	'
Long-term investments | Certificates of deposit	'	'
Estimated fair values of available-for-sale securities with unrealized losses	'	'
Cost	1,680	'
Unrealized Losses	-7	'
Fair Value	1,673	'
Investments by rolling maturity, Unrealized Gains	'	'
Total	1	'
Investments by rolling maturity, Unrealized Losses	'	'
Total	($7)	'

Fair_Value_of_Financial_Instru4

Fair Value of Financial Instruments (Details 3) (USD $)

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

In Thousands, unless otherwise specified

Fair Value

Fair Value

Fair Value

Fair Value

Fair Value

Fair Value

Fair Value

Fair Value

Level 1

Level 1

Level 2

Level 2

Level 2

Level 2

Level 2

Level 2

Level 2

Level 2

Certificates of deposit

Certificates of deposit

Corporate notes

Corporate notes

U.S. government debt securities

U.S. government debt securities

Certificates of deposit

Certificates of deposit

Corporate notes

Corporate notes

U.S. government debt securities

U.S. government debt securities

Fair value hierarchy for its financial assets

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Money market funds

'

'

$1,682

$1,407

'

'

'

'

'

'

$1,682

$1,407

'

'

'

'

'

'

'

'

Available-for-sale securities

'

'

'

'

7,397

467

17,939

16,226

25,984

22,289

'

'

'

'

7,397

467

17,939

16,226

25,984

22,289

Total assets

'

'

53,002

40,389

'

'

'

'

'

'

1,682

1,407

51,320

38,982

'

'

'

'

'

'

Transfer of assets between Level 1 to Level 2

0

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Transfer of liabilities between Level 1 to Level 2

0

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Transfer of assets between Level 2 to Level 1

0

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Transfer of liabilities between Level 2 to Level 1

$0

$0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Sale_of_IO_Technology_Details

Sale of I/O Technology (Details) (Sale of license of a portion of intellectual property pertaining to high-speed serial I/O technology, USD $)	1 Months Ended		3 Months Ended
	Jul. 31, 2012	Mar. 31, 2012	Mar. 31, 2013	Sep. 30, 2013
		Employee
Sale of license of a portion of intellectual property pertaining to high-speed serial I/O technology	'	'	'	'
Patent Sale and License	'	'	'	'
Purchase agreement amount	'	$4,300,000	'	'
Number of employees of entity's India subsidiary accepted employment in purchaser	'	15	'	'
Cash received upon execution of the agreement, net of transaction costs	'	2,200,000	'	'
Holdback amount	'	1,900,000	'	0
Holdback payment received	$1,300,000	'	$600,000	'

Commitments_and_Contingencies_

Commitments and Contingencies (Details) (Settled litigation, USD $)	0 Months Ended	1 Months Ended	3 Months Ended
In Millions, except Share data, unless otherwise specified	Apr. 03, 2012	Sep. 30, 2010	Mar. 31, 2012
Settled litigation	'	'	'
Commitments and Contingencies	'	'	'
Contractual payment sought (in shares)	'	200,000	'
Cash award	$1.40	'	'
Value of shares retired, which were sought as damages	'	'	0.8
Amount recorded as expense	'	'	$0.60

Business_Segments_and_Signific2

Business Segments and Significant Customers (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
			Segment
			Measurement
Business Segments and Significant Customers	'	'	'	'
Number of business segments	'	'	1	'
Number of measurements of profitability	'	'	1	'
Business Segments	'	'	'	'
Total net revenue	$957	$1,327	$3,412	$4,487
Taiwan	'	'	'	'
Business Segments	'	'	'	'
Total net revenue	375	473	1,422	1,244
North America	'	'	'	'
Business Segments	'	'	'	'
Total net revenue	349	600	1,007	2,217
Japan	'	'	'	'
Business Segments	'	'	'	'
Total net revenue	217	247	956	940
Rest of Asia	'	'	'	'
Business Segments	'	'	'	'
Total net revenue	16	'	27	'
Europe	'	'	'	'
Business Segments	'	'	'	'
Total net revenue	'	$7	'	$86

Business_Segments_and_Signific3

Business Segments and Significant Customers (Details 2)	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2013	Dec. 31, 2012
	Total revenues	Total revenues	Total revenues	Total revenues	Total revenues	Total revenues	Total revenues	Total revenues	Total revenues	Net accounts receivable	Net accounts receivable
	Customer concentration risk	Customer concentration risk	Customer concentration risk	Customer concentration risk	Customer concentration risk	Customer concentration risk	Customer concentration risk	Customer concentration risk	Customer concentration risk	Credit concentration	Credit concentration
	Customer A	Customer A	Customer A	Customer A	Customer B	Customer B	Customer B	Customer B	Customer C	Two customers	Three customers
										Customer	Customer
Significant Customers	'	'	'	'	'	'	'	'	'	'	'
Percentage of concentration risk	39.00%	36.00%	41.00%	27.00%	13.00%	34.00%	12.00%	32.00%	11.00%	100.00%	100.00%
Number of customers	'	'	'	'	'	'	'	'	'	2	3

StockBased_Compensation_Detail

Stock-Based Compensation (Details) (USD $)

3 Months Ended

9 Months Ended

3 Months Ended

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Inducement grant options

Inducement grant options

Inducement grant options

Plans

Plans

Plans

Plans

Plans

Options

Options

Options

RSU's

RSU's

Stock-Based Compensation

'

'

'

'

'

'

'

'

'

'

'

'

Stock-based compensation expense

$1,000,000

$900,000

$2,800,000

$3,000,000

'

'

'

'

'

'

'

'

Unamortized compensation cost, net of expected forfeitures

6,100,000

'

6,100,000

'

'

'

'

'

'

'

'

'

Weighted average period for recognition of unamortized compensation cost

'

'

'2 years 8 months 8 days

'

'

'

'

'

'

'

'

'

Tax benefits associated with the exercise of stock options

$0

$0

$0

$0

'

'

'

'

'

'

'

'

Available for Grant

'

'

'

'

'

'

'

'

'

'

'

'

Balance at the beginning of the period (in shares)

'

'

'

'

'

'

'

529,000

1,682,000

1,265,000

'

'

Additional shares authorized under the 2010 Plan

'

'

'

'

'

'

'

'

'

500,000

'

'

Options granted (in shares)

'

'

'

'

'

'

'

-228,000

-1,140,000

-176,000

'

'

Restricted stock units granted (in shares)

'

'

'

'

'

'

'

'

'

'

'

-35,000

Options cancelled (in shares)

'

'

'

'

'

'

'

469,000

113,000

471,000

'

'

Options expired (in shares)

'

'

'

'

'

'

'

-350,000

-91,000

-378,000

'

'

Balance at the end of the period (in shares)

'

'

'

'

'

'

'

420,000

529,000

1,682,000

'

'

Number of Shares

'

'

'

'

'

'

'

'

'

'

'

'

Balance at the beginning of the period (in shares)

'

'

'

'

3,383,000

3,414,000

3,358,000

7,366,000

6,408,000

6,872,000

'

'

Options granted (in shares)

'

'

'

'

136,000

'

151,000

228,000

1,140,000

176,000

'

'

Options cancelled (in shares)

'

'

'

'

'

'

-1,000

-469,000

-113,000

-471,000

'

'

Options exercised (in shares)

'

'

'

'

-32,000

-31,000

-94,000

-117,000

-69,000

-169,000

'

'

Balance at the end of the period (in shares)

'

'

'

'

3,487,000

3,383,000

3,414,000

7,008,000

7,366,000

6,408,000

'

'

Weighted Average Exercise Prices

'

'

'

'

'

'

'

'

'

'

'

'

Balance at the beginning of the period (in dollars per share)

'

'

'

'

$4.39

$4.37

$4.29

$3.98

$3.97

$4.05

'

'

Options granted (in dollars per share)

'

'

'

'

$3.59

'

$4.21

$3.98

$4.46

$3.48

'

'

Options cancelled (in dollars per share)

'

'

'

'

'

'

$1.50

$6.15

$7.04

$5.48

'

'

Options exercised (in dollars per share)

'

'

'

'

$1.54

$1.54

$1.55

$2.66

$3.34

$2.80

'

'

Options expired (in dollars per share)

'

'

'

'

'

'

'

$6.80

$7.85

$5.78

'

'

Balance at the end of the period (in dollars per share)

'

'

'

'

$4.39

$4.39

$4.37

$3.88

$3.98

$3.97

'

'

Number of Shares

'

'

'

'

'

'

'

'

'

'

'

'

Non-vested shares at the beginning of the period

'

'

'

'

'

'

'

'

'

'

35,000

'

Restricted stock units granted (in shares)

'

'

'

'

'

'

'

'

'

'

'

35,000

Vested (in shares)

'

'

'

'

'

'

'

'

'

'

-8,000

'

Non-vested shares at the end of the period

'

'

'

'

'

'

'

'

'

'

27,000

35,000

Weighted Average Grant-Date Fair Value

'

'

'

'

'

'

'

'

'

'

'

'

Non-vested shares at the beginning of the period (in dollars per share)

'

'

'

'

'

'

'

'

'

'

$4.46

'

Restrict stock units granted (in dollars per share)

'

'

'

'

'

'

'

'

'

'

'

$4.46

Vested (in dollars per share)

'

'

'

'

'

'

'

'

'

'

$4.46

'

Non-vested shares at the end of the period (in dollars per share)

'

'

'

'

'

'

'

'

'

'

$4.46

$4.46

StockBased_Compensation_Detail1

Stock-Based Compensation (Details 2) (USD $)	9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013
Options Outstanding	'
Number Outstanding (in shares)	10,495
Weighted Average Remaining Contractual Life	'3 years 9 months 14 days
Weighted Average Exercise Price (in dollars per share)	$4.05
Aggregate Intrinsic value (in dollars)	$3,645
Options Exercisable	'
Number Exercisable (in shares)	6,595
Weighted Average Remaining Contractual Life	'2 years 6 months 11 days
Weighted Average Exercise Price (in dollars per share)	$4.10
Aggregate Intrinsic value (in dollars)	2,825
$1.50 - $3.23	'
Exercise price range	'
Low end of the range (in dollars per share)	$1.50
High end of the range (in dollars per share)	$3.23
Options Outstanding	'
Number Outstanding (in shares)	3,009
Weighted Average Remaining Contractual Life	'3 years 5 months 19 days
Weighted Average Exercise Price (in dollars per share)	$2.57
Aggregate Intrinsic value (in dollars)	3,459
Options Exercisable	'
Number Exercisable (in shares)	1,874
Weighted Average Remaining Contractual Life	'2 years 9 months 7 days
Weighted Average Exercise Price (in dollars per share)	$2.25
Aggregate Intrinsic value (in dollars)	2,749
$3.24 - $4.25	'
Exercise price range	'
Low end of the range (in dollars per share)	$3.24
High end of the range (in dollars per share)	$4.25
Options Outstanding	'
Number Outstanding (in shares)	2,771
Weighted Average Remaining Contractual Life	'4 years 1 month 28 days
Weighted Average Exercise Price (in dollars per share)	$3.80
Aggregate Intrinsic value (in dollars)	186
Options Exercisable	'
Number Exercisable (in shares)	1,514
Weighted Average Remaining Contractual Life	'3 years 4 months 24 days
Weighted Average Exercise Price (in dollars per share)	$3.84
Aggregate Intrinsic value (in dollars)	$76
$4.26 - $5.61	'
Exercise price range	'
Low end of the range (in dollars per share)	$4.26
High end of the range (in dollars per share)	$5.61
Options Outstanding	'
Number Outstanding (in shares)	3,759
Weighted Average Remaining Contractual Life	'3 years 11 months 12 days
Weighted Average Exercise Price (in dollars per share)	$4.90
Options Exercisable	'
Number Exercisable (in shares)	2,545
Weighted Average Remaining Contractual Life	'1 year 9 months
Weighted Average Exercise Price (in dollars per share)	$5.10
$5.62 - $9.00	'
Exercise price range	'
Low end of the range (in dollars per share)	$5.62
High end of the range (in dollars per share)	$9
Options Outstanding	'
Number Outstanding (in shares)	956
Weighted Average Remaining Contractual Life	'3 years 25 days
Weighted Average Exercise Price (in dollars per share)	$6.07
Options Exercisable	'
Number Exercisable (in shares)	662
Weighted Average Remaining Contractual Life	'2 years 10 months 2 days
Weighted Average Exercise Price (in dollars per share)	$6.10

StockBased_Compensation_Detail2

Stock-Based Compensation (Details 3) (USD $)

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

0 Months Ended

1 Months Ended

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Aug. 30, 2013

Feb. 28, 2013

Jun. 30, 2010

Sep. 30, 2013

Options

Options

Options

Options

Options

Options

Options

Options

ESPP

ESPP

ESPP

ESPP

Minimum

Minimum

Maximum

Maximum

Period

Stock-Based Compensation

'

'

'

'

'

'

'

'

'

'

'

'

Outstanding options fully vested and expected to vest (in shares)

9,900,000

'

9,900,000

'

'

'

'

'

'

'

'

'

Remaining contractual life of options fully vested and expected to vest

'

'

'3 years 7 months 17 days

'

'

'

'

'

'

'

'

'

Weighted average exercise price of options fully vested and expected to vest (in dollars per share)

$4.06

'

$4.06

'

'

'

'

'

'

'

'

'

Aggregate intrinsic value of options fully vested and expected to vest (in dollars)

$3,500,000

'

$3,500,000

'

'

'

'

'

'

'

'

'

Fair value of shares vested (in dollars)

'

'

2,500,000

1,700,000

'

'

'

'

'

'

'

'

Total intrinsic value of awards exercised (in dollars)

'

'

800,000

2,300,000

'

'

'

'

'

'

'

'

Awards exercisable (in shares)

'

6,200,000

'

6,200,000

'

'

'

'

'

'

'

'

Weighted average exercise price of awards exercisable (in dollars per share)

'

$4.43

'

$4.43

'

'

'

'

'

'

'

'

Assumptions used in estimation of fair value of the share-based payment awards on the grant date

'

'

'

'

'

'

'

'

'

'

'

'

Risk-free interest rate, minimum (as a percent)

1.00%

0.20%

0.50%

0.20%

'

'

'

'

'

'

'

'

Risk-free interest rate, maximum (as a percent)

1.70%

0.60%

1.70%

0.80%

'

'

'

'

'

'

'

'

Volatility, minimum (as a percent)

57.70%

65.20%

57.70%

65.20%

'

'

'

'

'

'

'

'

Volatility, maximum (as a percent)

62.90%

73.10%

62.90%

73.10%

'

'

'

'

'

'

'

'

Expected life

'

'4 years

'

'4 years

'4 years

'4 years

'5 years

'5 years

'

'

'

'

Dividend yield (as a percent)

0.00%

0.00%

0.00%

0.00%

'

'

'

'

'

'

'

'

Employee Stock Purchase Plan

'

'

'

'

'

'

'

'

'

'

'

'

Number of shares reserved for issuance

'

'

'

'

'

'

'

'

'

'

2,000,000

'

Maximum amount of shares that eligible employee may purchase annually (in dollars)

'

'

'

'

'

'

'

'

'

'

25,000

'

Number of offering periods

'

'

'

'

'

'

'

'

'

'

2

'

Offering period

'

'

'

'

'

'

'

'

'

'

'6 months

'

Purchase price to be paid by participants as a percentage of price per share either at the beginning or the end of each six-month offering period, whichever is less

'

'

'

'

'

'

'

'

'

'

85.00%

'

Shares of common stock issued under the plan

'

'

'

'

'

'

'

'

128,000

147,000

'

'

Aggregate purchase price (in dollars)

'

'

'

'

'

'

'

'

$381,000

$426,000

'

'

Shares authorized and unissued

'

'

'

'

'

'

'

'

'

'

'

1,061,000

Stockholders_Equity_Details

Stockholder's Equity (Details) (USD $)	3 Months Ended	9 Months Ended
In Thousands, except Share data, unless otherwise specified	Jun. 30, 2013	Sep. 30, 2013
Stockholder's Equity	'	'
Number of shares of common stock issued in public offering	7,500,000	'
Net proceeds from issue of shares of common stock in equity offering	$27,700	$27,746
Number of shares issued to MoSys' chief executive officer	'	250,000

Related_Party_Transactions_Det

Related Party Transactions (Details) (Credo, USD $)	1 Months Ended	9 Months Ended	12 Months Ended	1 Months Ended
	Feb. 29, 2012	Sep. 30, 2013	Dec. 31, 2012	Oct. 31, 2013
		Officer		Subsequent event
Related party transactions	'	'	'	'
Number of executive officers who loaned a portion of seed funding to related parties	'	2	'	'
Amount of loan provided by executive officers to related party	$250,000	'	'	'
Payment to be made to related party under development and marketing agreement	1,400,000	'	'	600,000
Payment made to related party	'	1,200,000	1,100,000	'
Initial amount of gross profits which will be retained by the entity	'	$1,900,000	'	'