PDF Solutions (PDFS) 10-Q 5 Nov 14 2014 Q3 Quarterly report Financial data

Document_And_Entity_Informatio

Document And Entity Information	9 Months Ended
	Sep. 30, 2014	Nov. 01, 2014
Document and Entity Information [Abstract]	'	'
Entity Registrant Name	'PDF SOLUTIONS INC	'
Document Type	'10-Q	'
Current Fiscal Year End Date	'--12-31	'
Entity Common Stock, Shares Outstanding	'	30,974,834
Amendment Flag	'false	'
Entity Central Index Key	'0001120914	'
Entity Current Reporting Status	'Yes	'
Entity Voluntary Filers	'No	'
Entity Filer Category	'Accelerated Filer	'
Entity Well-known Seasoned Issuer	'No	'
Document Period End Date	30-Sep-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q3	'

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (Unaudited) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$116,121	$89,371
Accounts receivable, net of allowance of $273 and $354, respectively	27,064	34,860
Deferred tax assets - current portion	4,046	5,920
Prepaid expenses and other current assets	3,169	3,632
Total current assets	150,400	133,783
Property and equipment, net	8,679	7,064
Deferred tax assets - non-current portion	7,590	8,599
Other non-current assets	1,292	1,718
Total assets	167,961	151,164
Current liabilities:	'	'
Accounts payable	992	1,129
Accrued compensation and related benefits	5,181	7,707
Accrued and other current liabilities	1,564	1,593
Deferred revenues	2,637	2,096
Billings in excess of recognized revenues	'	343
Total current liabilities	10,374	12,868
Non-current liabilities	3,274	3,584
Total liabilities	13,648	16,452
Commitments and contingencies (Note 10)	'	'
Stockholders’ equity:	'	'
Preferred stock, $0.00015 par value, 5,000 shares authorized, no shares issued and outstanding	0	0
Common stock, $0.00015 par value, 70,000 shares authorized: shares issued 36,050 and 35,285, respectively; shares outstanding 30,963 and 30,437, respectively	5	5
Additional paid-in-capital	245,807	233,813
Treasury stock at cost, 5,087 and 4,848 shares, respectively	-33,326	-28,905
Accumulated deficit	-57,937	-70,649
Accumulated other comprehensive income	-236	448
Total stockholders’ equity	154,313	134,712
Total liabilities and stockholders’ equity	$167,961	$151,164

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, except Per Share data, unless otherwise specified
Accounts receivable, allowance (in Dollars)	$273	$354
Preferred stock, par value (in Dollars per share)	$0.00	$0.00
Preferred stock, shares authorized	5,000	5,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in Dollars per share)	$0.00	$0.00
Common stock, shares authorized	70,000	70,000
Common stock, shares issued	36,050	35,285
Common stock, shares outstanding	30,963	30,437
Treasury stock shares	5,087	4,848

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) (USD $)	3 Months Ended		9 Months Ended
Share data in Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenues:	'	'	'	'
Design-to-silicon-yield solutions	$10,860,000	$17,015,000	$38,871,000	$46,813,000
Gainshare performance incentives	11,546,000	8,474,000	35,231,000	27,562,000
Total revenues	22,406,000	25,489,000	74,102,000	74,375,000
Costs of Design-to-silicon-yield solutions:	'	'	'	'
Direct costs of Design-to-silicon-yield solutions	9,722,000	10,507,000	28,273,000	29,905,000
Impairment of deferred costs	1,892,000	'	1,892,000	'
Total costs of Design-to-silicon-yield solutions	11,614,000	10,507,000	30,165,000	29,905,000
Gross profit	10,792,000	14,982,000	43,937,000	44,470,000
Operating expenses:	'	'	'	'
Research and development	3,349,000	3,396,000	10,282,000	9,944,000
Selling, general and administrative	4,498,000	3,812,000	13,487,000	13,010,000
Amortization of other acquired intangible assets	'	19,000	31,000	56,000
Restructuring charges (credits)	0	8,000	57,000	-35,000
Total operating expenses	7,847,000	7,235,000	23,857,000	22,975,000
Income from operations	2,945,000	7,747,000	20,080,000	21,495,000
Interest and other income (expense), net	33,000	-283,000	-82,000	-109,000
Income before income taxes	2,978,000	7,464,000	19,998,000	21,386,000
Income tax provision	1,217,000	2,640,000	7,287,000	7,279,000
Net income	1,761,000	4,824,000	12,711,000	14,107,000
Net income per share:	'	'	'	'
Basic (in Dollars per share)	$0.06	$0.16	$0.41	$0.48
Diluted (in Dollars per share)	$0.05	$0.15	$0.40	$0.45
Weighted average common shares:	'	'	'	'
Basic (in Shares)	30,876	30,000	30,648	29,668
Diluted (in Shares)	32,079	31,623	31,975	31,198
Net income	1,761,000	4,824,000	12,711,000	14,107,000
Other comprehensive income:	'	'	'	'
Foreign currency translation adjustments, net of tax	-542,000	236,000	-683,000	249,000
Comprehensive income	$1,219,000	$5,060,000	$12,028,000	$14,356,000

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Operating activities:	'	'
Net income	$12,711,000	$14,107,000
Adjustments to reconcile net income to net cash provided by operating activities:	'	'
Depreciation and amortization	1,459,000	961,000
Stock-based compensation expense	6,259,000	4,942,000
Impairment of deferred costs	1,892,000	'
Amortization of acquired intangible assets	31,000	56,000
Deferred taxes	2,985,000	4,220,000
Gain on disposal of property and equipment	-93,000	-9,000
Purchases of treasury stock in connection with tax withholdings on restricted stock grants	-855,000	-395,000
Reversal of allowance for doubtful accounts	-81,000	-82,000
Unrealized gain on foreign currency forward contract	41,000	'
Tax benefit related to stock-based compensation expense	1,235,000	454,000
Excess tax benefit from stock-based compensation	-1,154,000	-439,000
Changes in operating assets and liabilities:	'	'
Accounts receivable	7,877,000	6,021,000
Prepaid expenses and other assets	-1,132,000	-1,106,000
Accounts payable	-768,000	-1,261,000
Accrued compensation and related benefits	-2,413,000	-3,972,000
Accrued and other liabilities	-334,000	-1,293,000
Deferred revenues	501,000	-796,000
Billings in excess of recognized revenues	-343,000	-521,000
Net cash provided by operating activities	27,818,000	20,887,000
Investing activities:	'	'
Purchases of property and equipment	-3,274,000	-3,372,000
Proceeds from the sales of property and equipment	135,000	'
Net cash used in investing activities	-3,139,000	-3,372,000
Financing activities:	'	'
Proceeds from exercise of stock options	3,062,000	4,270,000
Proceeds from employee stock purchase plan	1,437,000	1,317,000
Excess tax benefit from stock-based compensation	1,154,000	439,000
Purchases of treasury stock	-3,566,000	'
Net cash provided by financing activities	2,087,000	6,026,000
Effect of exchange rate changes on cash and cash equivalents	-16,000	55,000
Net change in cash and cash equivalents	26,750,000	23,596,000
Cash and cash equivalents, beginning of period	89,371,000	61,637,000
Cash and cash equivalents, end of period	116,121,000	85,233,000
Cash paid during the period for:	'	'
Taxes	3,322,000	3,252,000
Property and equipment received and accrued in accounts payable and accrued and other liabilities	$170,000	$347,000

Note_1_Basis_of_Presentation

Note 1 - Basis of Presentation	9 Months Ended
	Sep. 30, 2014
Disclosure Text Block [Abstract]	'
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	'
	1. BASIS OF PRESENTATION
	Basis of Presentation
	The interim unaudited condensed consolidated financial statements included herein have been prepared by PDF Solutions, Inc. (“the Company”) pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”), including the instructions to the Quarterly Report on Form 10-Q and Article 10 of Regulation S-X. Certain information and footnote disclosures normally included in annual financial statements prepared in accordance with accounting principles generally accepted in the United States of America have been condensed or omitted. The interim unaudited condensed consolidated financial statements reflect, in the opinion of management, all adjustments necessary (consisting only of normal recurring adjustments), to present a fair statement of results for the interim periods presented. The operating results for any interim period are not necessarily indicative of the results that may be expected for other interim periods or the full fiscal year. The accompanying interim unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto in the Company’s Annual Report on Form 10-K for the year ended December 31, 2013.
	The condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries after the elimination of all significant intercompany balances and transactions.
	The condensed consolidated balance sheet at December 31, 2013, has been derived from the audited consolidated financial statements but does not include all disclosures required by accounting principles generally accepted in the United States of America.
	Use of Estimates  —  The preparation of financial statements in conformity with generally accepted accounting principles in the United States (“U.S. 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 the reported amounts of revenues and expenses during the reporting period. Significant estimates in these financial statements include revenue recognition for fixed-price solution implementation service contracts, stock-based compensation expense and accounting for income taxes. Actual results could differ from those estimates.
	Revenue Recognition  — The Company derives revenue from two sources: Design-to-silicon-yield solutions and Gainshare performance incentives.
	Design-to-Silicon-Yield Solutions — Revenue that is derived from Design-to-silicon-yield solutions comes from services and software licenses. The Company recognizes revenue of Design-to-silicon-yield solutions as follows:
	The Company generates a significant portion of its Design-to-silicon-yield solutions revenue from fixed-price solution implementation service contracts delivered over a specific period of time. These contracts require reliable estimation of costs to perform obligations and the overall scope of each engagement. Revenue under project–based contracts for solution implementation services is recognized as services are performed using the cost-to-cost percentage of completion method of contract accounting. Losses on fixed-price solution implementation contracts are recognized in the period when they become probable. Revisions in profit estimates are reflected in the period in which the conditions that require the revisions become known and can be estimated. Revenue under time and materials contracts for solution implementation services are recognized as the services are performed. On occasion, the Company licenses its software products as a component of its fixed-price service contracts. In such instances, the software products are licensed to customers over a specified term of the agreement with support and maintenance to be provided at each customer's option over the license term. The amount of product and service revenue recognized in a given period is affected by the Company’s judgment as to whether an arrangement includes multiple deliverables and, if so, the Company’s determination of the fair value of each deliverable. In general, vendor-specific objective evidence of selling price (“VSOE”) does not exist for the Company’s solution implementation services and software products and because the Company’s services and products include our unique technology, the Company is not able to determine third-party evidence of selling price (“TPE”). Therefore, in such circumstances the Company uses best estimated selling prices (“BESP”) in the allocation of arrangement consideration. In determining BESP, the Company applies significant judgment as the Company’s weighs a variety of factors, based on the facts and circumstances of the arrangement. The Company typically arrives at BESP for a product or service that is not sold separately by considering company-specific factors such as geographies, internal costs, gross margin objectives, pricing practices used to establish bundled pricing, and existing portfolio pricing and discounting. After fair value is established for each deliverable, the total transaction amount is allocated to each deliverable based upon its relative fair value. Fees allocated to solution implementation services are recognized using the cost-to-cost percentage of completion method of contract accounting. Fees allocated to software and related support and maintenance are recognized under software revenue recognition guidance. The Company defers certain precontract costs incurred for specific anticipated contracts. Deferred costs consist primarily of direct costs to provide solution implementation services in relation to the specific anticipated contracts. The Company recognizes such costs as a component of cost of revenues, the timing of which is dependent upon persuasive evidence of contract arrangement assuming all other revenue recognition criteria are met. At the end of reporting period, the Company evaluates its deferred costs for their probable recoverability. The Company recognizes impairment of deferred costs when it is determined that the costs no longer have future benefits and are no longer recoverable.
	The Company also licenses its software products separately from its solution implementations. For software license arrangements that do not require significant modification or customization of the underlying software, software license revenue is recognized under the residual method when (1) persuasive evidence of an arrangement exists, (2) delivery has occurred, (3) the fee is fixed or determinable, (4) collectability is probable, and (5) the arrangement does not require services that are essential to the functionality of the software. When arrangements include multiple elements such as support and maintenance, consulting (other than for its fixed price solution implementations), installation, and training, revenue is allocated to each element of a transaction based upon its fair value as determined by the Company’s VSOE and such services are recorded as services revenue. VSOE for maintenance is generally established based upon negotiated renewal rates while VSOE for consulting, installation, and training services is established based upon the Company’s customary pricing for such services when sold separately. Revenue for software licenses with extended payment terms is not recognized in excess of amounts due. For software license arrangements that require significant modification or customization of the underlying software, the software license revenue is recognized as services are performed using the cost-to-cost percentage of completion method of contract accounting, and such revenue is recorded as services revenue.
	Gainshare Performance Incentives — When the Company enters into a contract to provide yield improvement services, the contract usually includes two components: (1) a fixed fee for performance by the Company of services delivered over a specific period of time; and (2) a Gainshare performance incentive component where the customer may pay a contingent variable fee, usually after the fixed fee period has ended. Revenue derived from Gainshare performance incentives represents profit sharing and performance incentives earned contingent upon the Company’s customers reaching certain defined operational levels established in related solution implementation service contracts. Gainshare performance incentives periods are usually subsequent to the delivery of all contractual services and therefore have no cost to the Company. Due to the uncertainties surrounding attainment of such operational levels, the Company recognizes Gainshare performance incentives revenue (to the extent of completion of the related solution implementation contract) upon receipt of performance reports or other related information from the customer supporting the determination of amounts and probability of collection.

Note_2_Recent_Accounting_Prono

Note 2 - Recent Accounting Pronouncements	9 Months Ended
	Sep. 30, 2014
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]	'
New Accounting Pronouncements and Changes in Accounting Principles [Text Block]	'
	2. RECENT ACCOUNTING PRONOUNCEMENTS
	In May 2014, the Financial Accounting Standards Board ("FASB") issued new accounting guidance related to revenue recognition. The core principle is that a company should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration for which the entity expects to be entitled in exchange for those goods or services. The updated standard will replace most existing revenue recognition guidance under GAAP when it becomes effective and permits the use of either the retrospective or cumulative effect transition method. Early adoption is not permitted. The updated standard will be effective for the Company beginning January 1, 2017 and can be applied either retrospectively to each period presented or as a cumulative-effect adjustment as of the date of adoption. The Company has not yet selected a transition method and is currently evaluating the impact of adopting this new accounting standard on its financial statements.
	In August 2014, the FASB issued new guidance related to the disclosures around going concern. The new standard provides guidance around management's responsibility to evaluate whether there is substantial doubt about an entity's ability to continue as a going concern and to provide related footnote disclosures. The new standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2016. Early adoption is permitted. The adoption of this standard is not expected to have a material impact on our financial statements.

Note_3_Balance_Sheet_Component

Note 3 - Balance Sheet Components	9 Months Ended
	Sep. 30, 2014
Disclosure Text Block Supplement [Abstract]	'
Supplemental Balance Sheet Disclosures [Text Block]	'
	3. BALANCE SHEET COMPONENTS
	Accounts receivable include amounts that are unbilled at the end of the period. Unbilled accounts receivable are determined on an individual contract basis and were $9.4 million and $8.0 million as of September 30, 2014, and December 31, 2013, respectively.
	Property and equipment consists of (in thousands):
		September 30,			December 31,
		2014			2013
	Property and equipment, net:
	Computer equipment	$	10,033		$	9,969
	Software		3,374			3,441
	Furniture, fixtures and equipment		739			734
	Leasehold improvements		1,118			1,052
	Test equipment		5,693			4,928
	Construction-in-progress		2,641			1,421
			23,598			21,545
	Less: accumulated depreciation		(14,919	)		(14,481	)
	Total	$	8,679		$	7,064
	Depreciation and amortization expense was $0.5 million and $0.4 million for the three months ended September 30, 2014 and 2013, respectively. Depreciation and amortization expense was $1.5 million and $1.0 million for the nine months ended September 30, 2014 and 2013, respectively.
	Intangible assets balance was zero and $31,000 as of September 30, 2014, and December 31, 2013, respectively. The balance was included in other non-current assets in the accompanying condensed consolidated balance sheets. For the three-months ended September 30, 2014 and 2013, intangible asset amortization expense was zero and $19,000, respectively. For the nine months ended September 30, 2014 and 2013, intangible asset amortization expense was $31,000 and $56,000, respectively.
	Deferred costs balance was $0.1 million and $0.7 million as of September 30, 2014 and December 31, 2013, respectively. The balance was included in prepaid expenses and other current assets in the accompanying condensed consolidated balance sheets. During the three months ended September 30, 2014, the Company impaired $1.9 million of deferred pre-contract costs for two contracts with a customer as it was determined that the costs are no longer recoverable. The impairment charges were recorded in the impairment of deferred costs in the accompanying condensed consolidated statements of operations and comprehensive income.

Note_4_Stockholders_Equity

Note 4 - Stockholders' Equity	9 Months Ended
	Sep. 30, 2014
Disclosure Text Block Supplement [Abstract]	'
Shareholders' Equity and Share-based Payments [Text Block]	'
	4. STOCKHOLDERS’ EQUITY
	Stock-based compensation is estimated at the grant date based on the award’s fair value and is recognized on a straight-line basis over the vesting periods, generally four years. Stock-based compensation expenses before taxes related to the Company’s stock plans and employee stock purchase plan were allocated as follows (in thousands):
		Three Months						Nine Months
		Ended September 30,						Ended September 30,
		2014			2013			2014			2013
	Cost of Design-to-silicon yield-solutions	$	947		$	812		$	2,467		$	1,995
	Research and development		426			484			1,230			1,143
	Selling, general and administrative		853			628			2,562			1,804
	Stock-based compensation expenses	$	2,226		$	1,924		$	6,259		$	4,942
	On September 30, 2014, the Company has in effect the following stock-based compensation plans:
	Stock Plans — At the annual meeting of stockholders on November 16, 2011, the Company’s stockholders approved the 2011 Stock Incentive Plan, which was first amended and restated at the 2013 annual meeting of stockholders on May 28, 2013, when the Company’s stockholders approved the First Amended and Restated 2011 Stock Incentive Plan and then subsequently amended at the 2014 annual meeting of stockholders on May 27, 2014, when the Company’s stockholders approved the Second Amended and Restated 2011 Incentive Plan (as amended, the “2011 Plan”). Under the 2011 Plan, the Company may award stock options, stock appreciation rights, stock grants or stock units covering shares of the Company's common stock to employees, directors, non-employee directors and contractors. The aggregate number of shares reserved for awards under this plan is 6,550,000 shares, plus up to 3,500,000 shares previously issued under the 2001 Plan that are forfeited or repurchased by the Company or shares subject to awards previously issued under the 2001 Plan that expire or that terminate without having been exercised or settled in full on or after November 16, 2011. In case of awards other than options or stock appreciation rights, the aggregate number of shares reserved under the plan will be decreased at a rate of 1.33 shares issued pursuant to such awards. The exercise price for stock options must generally be at prices no less than the fair market value at the date of grant. Stock options generally expire ten years from the date of grant and become vested and exercisable over a four-year period.
	In 2001, the Company adopted a 2001 Stock Plan (the “2001 Plan”). In 2003, in connection with its acquisition of IDS Systems Inc., the Company assumed IDS’ 2001 Stock Option / Stock Issuance Plan (the “IDS Plan”).  Both of the 2001 and the IDS Plans expired in 2011.  Stock options granted under the 2001 and IDS Plans generally expire ten years from the date of grant and become vested and exercisable over a four-year period. Although no new awards may be granted under the 2001 or IDS Plans, awards made under the 2001 and IDS Plans that are currently outstanding remain subject to the terms of each such plan.
	The Company estimated the fair value of share-based awards granted under the Stock Plan during the period using the Black-Scholes-Merton option-pricing model with the following weighted average assumptions, resulting in the following weighted average fair values:
		Three Months						Nine Months
		Ended September 30,						Ended September 30,
		2014			2013			2014			2013
	Expected life (in years)		4.58			4.78			4.58			4.78
	Volatility		44.88	%		50.3	%		43.45	%		55.83	%
	Risk-free interest rate		1.63	%		1.31	%		1.55	%		0.94	%
	Expected dividend		—			—			—			—
	Weighted average fair value per share of options granted during the period	$	7.54		$	9.13		$	7.44		$	7.55
	As of September 30, 2014, 7.0 million shares of common stock were reserved to cover stock-based awards under the 2011 Plan, of which 3.9 million shares were available for future grant. The number of shares reserved and available under the 2011 Plan includes 0.4 million shares that were subject to awards previously made under the 2001 Plan and were forfeited, expired or repurchased by the Company after adoption of the 2011 Plan through September 30, 2014.  As of September 30, 2014, there were no outstanding awards that had been granted outside of the 2011, 2001 or the IDS Plans (collectively, the "Stock Plans").
	Stock option activity under the Company’s Stock Plans during the nine months ended September 30, 2014, was as follows:
		Number of			Weighted			Weighted			Aggregate
		Options			Average			Average			Intrinsic
		(in			Exercise			Remaining			Value
		thousands)			Price			Contractual			(in
					per Share			Term			thousands)
								(years)
	Outstanding, January 1, 2014		2,880		$	7.35
	Granted (weighted average fair value of $7.44 per share)		19		$	19.55
	Exercised		(484	)	$	6.33
	Canceled		(33	)	$	9.82
	Expired		(6	)	$	5.91
	Outstanding, September 30, 2014		2,376		$	7.63			5.96		$	12,428
	Vested and expected to vest, September 30, 2014		2,344		$	7.59			5.93		$	12,316
	Exercisable, September 30, 2014		1,762		$	7.14			5.41		$	9,895
	The aggregate intrinsic value in the table above represents the total intrinsic value based on the Company’s closing stock price of $12.61 per share as of September 30, 2014. The total intrinsic value of options exercised during the nine months ended September 30, 2014, was $6.5 million.
	As of September 30, 2014, there was $2.5 million of total unrecognized compensation cost related to unvested stock options. That cost is expected to be recognized over a weighted average period of 1.5 years. The total fair value of shares vested during the nine months ended September 30, 2014, was $1.6 million.
	Nonvested restricted stock units activity during the nine months ended September 30, 2014, was as follows:
		Shares			Weighted
		(in thousands)			Average
					Grant Date
					Fair Value Per
					Share
	Nonvested, January 1, 2014		759		$	14.44
	Granted		560		$	19.52
	Vested		(167	)	$	13.77
	Forfeited		(25	)	$	17.99
	Nonvested, September 30, 2014		1,127		$	17.04
	As of September 30, 2014, there was $15.1 million of total unrecognized compensation cost related to nonvested restricted stock units. That cost is expected to be recognized over a weighted average period of 2.8 years.
	Employee Stock Purchase Plan — In July 2001, the Company adopted a ten-year Employee Stock Purchase Plan (as amended, “Purchase Plan”) under which eligible employees can contribute up to 10% of their compensation, as defined in the Purchase Plan, towards the purchase of shares of PDF common stock at a price of 85% of the lower of the fair market value at the beginning of the offering period or the end of the purchase period. The Purchase Plan consists of twenty-four-month offering periods with four six-month purchase periods in each offering period. Under the Purchase Plan, on January 1 of each year, starting with 2002, the number of shares reserved for issuance will automatically increase by the lesser of (1) 675,000 shares, (2) 2% of the Company’s outstanding common stock on the last day of the immediately preceding year, or (3) the number of shares determined by the board of directors. At the annual meeting of stockholders on May 18, 2010, the Company’s stockholders approved an amendment to the Purchase Plan to extend it through May 17, 2020.
	The Company estimated the fair value of purchase rights granted under the Purchase Plan during the period using the Black-Scholes-Merton option-pricing model with the following weighted average assumptions, resulting in the following weighted average fair values:
		Nine Months
		Ended September 30,
		2014			2013
	Expected life (in years)		1.25			1.25
	Volatility		33.46	%		45.29	%
	Risk-free interest rate		0.21	%		0.19	%
	Expected dividend		—			—
	Weighted average fair value of purchase rights granted under the Purchase Plan	$	6.44		$	5.56
	During the three months ended September 30, 2014 and 2013,a total of 62,000 and 80,000 shares, respectively, were issued at a weighted-average purchase price of $13.06 and $9.66 per share,. During the nine months ended September 30, 2014 and 2013, a total of 114,000 and 184,000 shares, respectively, were issued at a weighted-average purchase price of $12.62 and $7.16 per share, respectively, under the Purchase Plan. For both the three-month periods ended September 30, 2014 and 2013, the Purchase Plan compensation expense was $0.1 million. For both the nine months ended September 30, 2014 and 2013, the Purchase Plan compensation expense was $0.5 million. As of September 30, 2014, there was $0.4 million of unrecognized compensation cost related to the Purchase Plan. That cost is expected to be recognized over a weighted average period of 1.1 years. As of September 30, 2014, 1.2 million shares were available for future issuance under the Purchase Plan.
	Stock Repurchase Program — On November 8, 2012, the Board of Directors adopted a program to repurchase up to $20.0 million of the Company’s common stock on the open market over the next two years. As of September 30, 2014, 230,311 shares had been repurchased at the average price of $17.56 per share under this program, at a total purchase of $4.0 million, and $16.0 million remained available for future repurchases. The current program will expire on November 8, 2014. In anticipation of the expiration of the existing program, on October 21, 2014, the Board of Directors adopted a new program, effectively immediately, to repurchase up to $25.0 million of the Company’s common stock both on the open market and in privately negotiated transactions over the next two years.

Note_5_Restructuring

Note 5 - Restructuring	9 Months Ended
	Sep. 30, 2014
Restructuring and Related Activities [Abstract]	'
Restructuring and Related Activities Disclosure [Text Block]	'
	5. RESTRUCTURING
	The Company implemented restructuring plans during fiscal years 2012 and 2008, and recorded total restructuring charges of zero and $8,000 for the three months ended on September 30, 2014 and 2013, respectively. The Company recorded total restructuring charges of $57,000 for the nine months ended September 30, 2014 and restructuring credits of $35,000 for the nine months ended September 30, 2013. As of September 30, 2014, the Company had no outstanding restructuring accrual balance.
	October 2012 Plan
	On October 24, 2012, the Company announced a restructuring plan as part of the Company’s continuing efforts to simplify the organization, leverage cross-training and learning, and reduce annual operations expenses. Under this plan, the Company has recorded restructuring charges of $2.2 million, which primarily consisted of employee severance costs of $2.1 million. All outstanding accrual balance under this plan had been paid out as of June 30, 2014. The following table summarizes the activities of restructuring liabilities (in thousands) under this plan for the periods covered below:
		Three Months					Nine Months
		Ended September 30,					Ended September 30,
		2014		2013			2014			2013
	Beginning balance	$	—	$	66		$	13		$	896
	Restructuring charges		—		8			57			67
	Cash payments		—		(25	)		(70	)		(914	)
	Ending balance	$	—	$	49		$	—		$	49
	October 2008 Plan
	On October 28, 2008, the Company announced a restructuring plan to better allocate its resources to improve its operational results in light of the market conditions. Under this plan, the Company has recorded restructuring charges of $7.4 million, primarily consisting of employee severance costs of $4.7 million and facility exit costs of $2.7 million. All remaining accrual balance under this plan had been paid out as of December 31, 2013. There were no restructuring activities incurred under this plan during the three and nine months ended September 30, 2014. The following table summarizes the activities of restructuring liabilities (in thousands) under this plan for the periods covered below:
		Three Months					Nine Months
		Ended September 30,					Ended September 30,
		2014		2013			2014			2013
	Beginning balance	$	—	$	105		$	—		$	448
	Restructuring credits		—		—			—			(102	)
	Adjustments		—		—			—			3
	Cash payments		—		(105	)		—			(349	)
	Ending balance	$	—	$	—		$	—		$	—

Note_6_Income_Taxes

Note 6 - Income Taxes	9 Months Ended
	Sep. 30, 2014
Income Tax Disclosure [Abstract]	'
Income Tax Disclosure [Text Block]	'
	6. INCOME TAXES
	Income tax provision for both the nine months ended September 30, 2014 and 2013 was $7.3 million. The Company’s effective tax rate was 36.44% and 34.04% for the nine months ended September 30, 2014, and September 30, 2013, respectively.  The income tax provision for the nine months ended September 30, 2014, was less than the provision at the statutory rate primarily due to changes in unrecognized tax benefits. The income tax provision for the nine months ended September 30, 2013 was less than the provision at the statutory rate primarily due to changes in unrecognized tax benefits and the benefit of the research and development tax credit.
	On January 2, 2013, the President signed into law the American Taxpayer Relief Act which reinstated the U.S. Federal Research and Development tax credit retroactive to January 1, 2012, and extended the tax credit through December 31, 2013.  As a result of the new legislation, the Company recognized a benefit in the nine months ended September 30, 2013 related to 12 months of fiscal 2012 as well as a benefit to the annual effective tax rate for the full year research tax credit for fiscal 2013, which amounted to $0.4 million. The expiration of the U.S Federal research tax credit resulted in zero tax credit for the nine months ended September 30, 2014.
	The Company’s total amount of unrecognized tax benefits, excluding interest and penalties, as of September 30, 2014, was $10.2 million, of which $6.2 million, if recognized, would decrease the Company’s effective tax rate. The Company’s total amount of unrecognized tax benefits, excluding interest and penalties, as of December 31, 2013, was $10.2 million, of which $6.3 million, if recognized, would affect the Company's effective tax rate. As of September 30, 2014, the Company has recorded unrecognized tax benefits of $2.7 million, including interest and penalties, as long-term taxes payable in its condensed consolidated balance sheet. The remaining $7.9 million has been recorded net of our deferred tax assets, of which $4.0 million is subject to a full valuation allowance.
	As of September 30, 2014, the Company believes that most of its deferred tax assets are “more likely than not” to be realized with the exception of California R&D tax credits that have not met the “more likely than not” realization threshold criteria because on an annual basis and pursuant to current law, the Company generates more California credits than California tax. As a result, at September 30, 2014, the excess California R&D tax credits continue to be subject to a full valuation allowance. In the event the Company concludes at a future financial reporting period that there has been a change in its ability to realize the California R&D credit deferred tax assets, and it is at such time no longer “more likely than not” that the Company will realize the tax credits before applicable expiration dates, the Company’s tax provision will increase in the period in which the Company makes such determination.
	The Company conducts business globally and, as a result, files numerous consolidated and separate income tax returns in the U.S. federal, various state and foreign jurisdictions. Because the Company used some of the tax attributes carried forward from previous years to tax years that are still open, statutes of limitation remain open for all tax years to the extent of the attributes carried forward into tax year 2002 for federal and California tax purposes. The Company is not subject to income tax examinations in any other of its major foreign subsidiaries’ jurisdictions.

Note_7_Net_Income_Per_Share

Note 7 - Net Income Per Share	9 Months Ended
	Sep. 30, 2014
Earnings Per Share [Abstract]	'
Earnings Per Share [Text Block]	'
	7. NET INCOME PER SHARE
	Basic net income per share is computed by dividing net income by weighted average number of common shares outstanding for the period (excluding outstanding stock options and shares subject to repurchase). Diluted net income per share is computed using the weighted-average number of common shares outstanding for the period plus the potential effect of dilutive securities which are convertible into common shares (using the treasury stock method), except in cases in which the effect would be anti-dilutive. Under the treasury stock method, the amount that the employee must pay for exercising stock options, the amount of compensation cost for future service that the Company has not yet recognized, and the amount of the tax benefits that would be recorded in additional paid-in capital when the award becomes deductible are assumed to be used to repurchase shares.  The following is a reconciliation of the numerators and denominators used in computing basic and diluted net income per share (in thousands except per share amount):
		Three Months				Nine Months
		Ended September 30,				Ended September 30,
		2014		2013		2014		2013
	Numerator:
	Net income	$	1,761	$	4,824	$	12,711	$	14,107
	Denominator:
	Basic weighted average common shares outstanding		30,876		30,000		30,648		29,668
	Dilutive effect of equity incentive plans		1,203		1,623		1,327		1,530
	Diluted weighted average common shares outstanding		32,079		31,623		31,975		31,198
	Net income per share:
	Basic	$	0.06	$	0.16	$	0.41	$	0.48
	Diluted	$	0.05	$	0.15	$	0.4	$	0.45
	The following table sets forth potential shares of common stock that are not included in the diluted net income per share calculation above because to do so would be anti-dilutive for the periods indicated (in thousands):
		Three Months				Nine Months
		Ended September 30,				Ended September 30,
		2014		2013		2014		2013
	Outstanding options		34		60		25		48
	Nonvested restricted stock units		—		—		—		1
	Employee Stock Purchase Plan		30		—		40		—
	Total		64		60		65		49

Note_8_Customer_and_Geographic

Note 8 - Customer and Geographic Information	9 Months Ended
	Sep. 30, 2014
Segment Reporting [Abstract]	'
Segment Reporting Disclosure [Text Block]	'
	8. CUSTOMER AND GEOGRAPHIC INFORMATION
	Operating segments are defined as components of an enterprise about which separate financial information is available that is evaluated regularly by the chief operating decision maker, or group, in deciding how to allocate resources and in assessing performance.
	The Company’s chief operating decision maker, the chief executive officer, reviews discrete financial information presented on a consolidated basis for purposes of regularly making operating decisions and assessing financial performance. Accordingly, the Company considers itself to be in one operating segment, specifically the licensing and implementation of yield improvement solutions for companies designing and/or manufacturing integrated circuits.
	The Company had revenues from individual customers in excess of 10% of total revenues as follows:
		Three Months						Nine Months
		Ended September 30,						Ended September 30,
	Customer	2014			2013			2014			2013
	A		56	%		28	%		50	%		31	%
	B		13	%		13	%		16	%		17	%
	C		11	%		35	%		12	%		26	%
	The Company had gross accounts receivable from the following individual customers in excess of 10% of gross accounts receivable as follows:
	Customer	September 30,			December 31,
		2014			2013
	A		46	%		36	%
	B		24	%		17	%
	C		8	%		23	%
	Revenues from customers by geographic area based on the location of the customers’ work sites are as follows (in thousands):
		Three Months Ended September 30,
		2014						2013
		Revenues			Percentage			Revenues			Percentage
					of						of
					Revenues						Revenues
	North America	$	10,529			47	%	$	7,686			30	%
	Germany		7,913			35			5,140			20
	South Korea		1,304			6			8,272			32
	Japan		479			2			2,223			9
	Rest of Asia		925			4			1,256			5
	Rest of Europe		1,256			6			912			4
	Total revenue	$	22,406			100	%	$	25,489			100	%
		Nine Months Ended September 30,
		2014						2013
		Revenues			Percentage			Revenues			Percentage
					of						of
					Revenues						Revenues
	North America	$	32,087			43	%	$	28,367			38	%
	Germany		26,046			35			15,006			20
	South Korea		4,806			6			16,816			23
	Japan		3,408			5			6,445			9
	Rest of Asia		3,643			5			4,899			7
	Rest of Europe		4,112			6			2,842			3
	Total revenue	$	74,102			100	%	$	74,375			100	%
	Long-lived assets, net by geographic area are as follows (in thousands):
		September 30,			December 31,
		2014			2013
	North America	$	8,120		$	6,578
	Asia		432			364
	Europe		127			122
	Total long-lived assets, net	$	8,679		$	7,064

Note_9_Fair_Value_Measurements

Note 9 - Fair Value Measurements	9 Months Ended
	Sep. 30, 2014
Fair Value Disclosures [Abstract]	'
Fair Value Disclosures [Text Block]	'
	9. FAIR VALUE MEASUREMENTS
	Fair value is the exit price, or the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants as of the measurement date. The multiple assumptions used to value financial instruments are referred to as inputs, and a hierarchy for inputs used in measuring fair value is established, that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that the most observable inputs be used when available. Observable inputs reflect assumptions market participants would use in pricing an asset or liability based on market data obtained from independent sources while unobservable inputs reflect a reporting entity’s pricing based upon its own market assumptions. These inputs are ranked according to a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value into three broad levels.
	Level 1 -	Inputs are quoted prices in active markets for identical assets or liabilities.
	Level 2 -	Inputs are quoted prices for similar assets or liabilities in an active market, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable and market-corroborated inputs which are derived principally from or corroborated by observable market data.
	Level 3 -	Inputs are derived from valuation techniques in which one or more significant inputs or value drivers are unobservable.
	The following table represents the Company’s assets measured at fair value on a recurring basis as of September 30, 2014, and the basis for that measurement (in thousands):
	Assets		Total		Quoted		Significant		Significant
					Prices		Other		Unobservable
					in		Observable		Inputs
					Active		Inputs		(Level 3)
					Markets		(Level 2)
					for
					Identical
					Assets
					(Level 1)
	Money market mutual funds		$	26,355	$	26,355	$	—	$	—
	The following table represents the Company’s assets measured at fair value on a recurring basis as of December 31, 2013, and the basis for that measurement (in thousands):
	Assets		Total		Quoted		Significant		Significant
					Prices		Other		Unobservable
					in		Observable		Inputs
					Active		Inputs		(Level 3)
					Markets		(Level 2)
					for
					Identical
					Assets
					(Level 1)
	Money market mutual funds		$	26,353	$	26,353	$	—	$	—
	The Company enters into foreign currency forward contracts to reduce the exposure to foreign currency exchange rate fluctuations on certain foreign currency denominated monetary assets and liabilities, primarily on third-party accounts payables and intercompany balances. The primary objective of the Company’s hedging program is to reduce volatility of earnings related to foreign currency exchange rate fluctuations. The counterparty to these foreign currency forward contracts is a large global financial institution that the Company believes is creditworthy, and therefore, the Company believes the credit risk of counterparty nonperformance is not significant. These foreign currency forward contracts are not designated for hedge accounting treatment. Therefore, the change in fair value of these contracts is recorded into earnings as a component of other income (expense), net, and offsets the change in fair value of the foreign currency denominated assets and liabilities, which is also recorded in other income (expense), net. For the three months and nine months ended September 30, 2014, the Company recognized a realized loss on the contracts of $0.5 million and $0.6 million, respectively, which was recorded in other income (expense), net in the Company’s Statement of Operations and Comprehensive Income.
	The Company carries these derivatives financial instruments on its Consolidated Balance Sheets at their fair values. The Company’s foreign currency forward contracts are classified as Level 2 because it is not actively traded and the valuation inputs are based on quoted prices and market observable data of similar instruments. As of September 30, 2014, the Company had one outstanding forward contract with a notional amount of $6.7 million and recorded $41,000 other current liabilities associated with this outstanding forward contract.

Note_10_Commitments_and_Contin

Note 10 - Commitments and Contingencies	9 Months Ended
	Sep. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingencies Disclosure [Text Block]	'
	10. COMMITMENTS AND CONTINGENCIES
	Leases
	The Company leases administrative and sales offices and certain equipment under noncancelable operating leases, which contain various renewal options and, in some cases, require payment of common area costs, taxes and utilities. These operating leases expire at various times through 2019. Rent expense was both $0.5 million for the three months ended September 30, 2014 and 2013. Rent expense was $1.5 million for both the nine months ended September 30, 2014 and 2013.
	Future minimum lease payments under noncancelable operating leases at September 30, 2014, are as follows (in thousands):
	Year Ending December 31,	Amount
	2014 (remaining three months)	$	468
	2015		1,773
	2016		1,713
	2017		1,409
	2018		797
	Thereafter		61
	Total future minimum lease payments	$	6,221
	Litigation — From time to time, the Company is subject to various claims and legal proceedings that arise in the ordinary course of business. The Company accrues for losses related to litigation when a potential loss is probable and the loss can be reasonably estimated in accordance with FASB requirements. During the reported period, the Company was not party to any material legal proceedings, thus no loss was probable and no amount was accrued at September 30, 2014.

Accounting_Policies_by_Policy_

Accounting Policies, by Policy (Policies)	9 Months Ended
	Sep. 30, 2014
Accounting Policies [Abstract]	'
Basis of Accounting, Policy [Policy Text Block]	'
	Basis of Presentation
	The interim unaudited condensed consolidated financial statements included herein have been prepared by PDF Solutions, Inc. (“the Company”) pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”), including the instructions to the Quarterly Report on Form 10-Q and Article 10 of Regulation S-X. Certain information and footnote disclosures normally included in annual financial statements prepared in accordance with accounting principles generally accepted in the United States of America have been condensed or omitted. The interim unaudited condensed consolidated financial statements reflect, in the opinion of management, all adjustments necessary (consisting only of normal recurring adjustments), to present a fair statement of results for the interim periods presented. The operating results for any interim period are not necessarily indicative of the results that may be expected for other interim periods or the full fiscal year. The accompanying interim unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto in the Company’s Annual Report on Form 10-K for the year ended December 31, 2013.
	The condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries after the elimination of all significant intercompany balances and transactions.
	The condensed consolidated balance sheet at December 31, 2013, has been derived from the audited consolidated financial statements but does not include all disclosures required by accounting principles generally accepted in the United States of America.
Use of Estimates, Policy [Policy Text Block]	'
	Use of Estimates  —  The preparation of financial statements in conformity with generally accepted accounting principles in the United States (“U.S. 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 the reported amounts of revenues and expenses during the reporting period. Significant estimates in these financial statements include revenue recognition for fixed-price solution implementation service contracts, stock-based compensation expense and accounting for income taxes. Actual results could differ from those estimates.
Revenue Recognition, Policy [Policy Text Block]	'
	Revenue Recognition  — The Company derives revenue from two sources: Design-to-silicon-yield solutions and Gainshare performance incentives.
	Design-to-Silicon-Yield Solutions — Revenue that is derived from Design-to-silicon-yield solutions comes from services and software licenses. The Company recognizes revenue of Design-to-silicon-yield solutions as follows:
	The Company generates a significant portion of its Design-to-silicon-yield solutions revenue from fixed-price solution implementation service contracts delivered over a specific period of time. These contracts require reliable estimation of costs to perform obligations and the overall scope of each engagement. Revenue under project–based contracts for solution implementation services is recognized as services are performed using the cost-to-cost percentage of completion method of contract accounting. Losses on fixed-price solution implementation contracts are recognized in the period when they become probable. Revisions in profit estimates are reflected in the period in which the conditions that require the revisions become known and can be estimated. Revenue under time and materials contracts for solution implementation services are recognized as the services are performed. On occasion, the Company licenses its software products as a component of its fixed-price service contracts. In such instances, the software products are licensed to customers over a specified term of the agreement with support and maintenance to be provided at each customer's option over the license term. The amount of product and service revenue recognized in a given period is affected by the Company’s judgment as to whether an arrangement includes multiple deliverables and, if so, the Company’s determination of the fair value of each deliverable. In general, vendor-specific objective evidence of selling price (“VSOE”) does not exist for the Company’s solution implementation services and software products and because the Company’s services and products include our unique technology, the Company is not able to determine third-party evidence of selling price (“TPE”). Therefore, in such circumstances the Company uses best estimated selling prices (“BESP”) in the allocation of arrangement consideration. In determining BESP, the Company applies significant judgment as the Company’s weighs a variety of factors, based on the facts and circumstances of the arrangement. The Company typically arrives at BESP for a product or service that is not sold separately by considering company-specific factors such as geographies, internal costs, gross margin objectives, pricing practices used to establish bundled pricing, and existing portfolio pricing and discounting. After fair value is established for each deliverable, the total transaction amount is allocated to each deliverable based upon its relative fair value. Fees allocated to solution implementation services are recognized using the cost-to-cost percentage of completion method of contract accounting. Fees allocated to software and related support and maintenance are recognized under software revenue recognition guidance. The Company defers certain precontract costs incurred for specific anticipated contracts. Deferred costs consist primarily of direct costs to provide solution implementation services in relation to the specific anticipated contracts. The Company recognizes such costs as a component of cost of revenues, the timing of which is dependent upon persuasive evidence of contract arrangement assuming all other revenue recognition criteria are met. At the end of reporting period, the Company evaluates its deferred costs for their probable recoverability. The Company recognizes impairment of deferred costs when it is determined that the costs no longer have future benefits and are no longer recoverable.
	The Company also licenses its software products separately from its solution implementations. For software license arrangements that do not require significant modification or customization of the underlying software, software license revenue is recognized under the residual method when (1) persuasive evidence of an arrangement exists, (2) delivery has occurred, (3) the fee is fixed or determinable, (4) collectability is probable, and (5) the arrangement does not require services that are essential to the functionality of the software. When arrangements include multiple elements such as support and maintenance, consulting (other than for its fixed price solution implementations), installation, and training, revenue is allocated to each element of a transaction based upon its fair value as determined by the Company’s VSOE and such services are recorded as services revenue. VSOE for maintenance is generally established based upon negotiated renewal rates while VSOE for consulting, installation, and training services is established based upon the Company’s customary pricing for such services when sold separately. Revenue for software licenses with extended payment terms is not recognized in excess of amounts due. For software license arrangements that require significant modification or customization of the underlying software, the software license revenue is recognized as services are performed using the cost-to-cost percentage of completion method of contract accounting, and such revenue is recorded as services revenue.
	Gainshare Performance Incentives — When the Company enters into a contract to provide yield improvement services, the contract usually includes two components: (1) a fixed fee for performance by the Company of services delivered over a specific period of time; and (2) a Gainshare performance incentive component where the customer may pay a contingent variable fee, usually after the fixed fee period has ended. Revenue derived from Gainshare performance incentives represents profit sharing and performance incentives earned contingent upon the Company’s customers reaching certain defined operational levels established in related solution implementation service contracts. Gainshare performance incentives periods are usually subsequent to the delivery of all contractual services and therefore have no cost to the Company. Due to the uncertainties surrounding attainment of such operational levels, the Company recognizes Gainshare performance incentives revenue (to the extent of completion of the related solution implementation contract) upon receipt of performance reports or other related information from the customer supporting the determination of amounts and probability of collection.

Note_3_Balance_Sheet_Component1

Note 3 - Balance Sheet Components (Tables)	9 Months Ended
	Sep. 30, 2014
Disclosure Text Block Supplement [Abstract]	'
Property, Plant and Equipment [Table Text Block]	'
		September 30,			December 31,
		2014			2013
	Property and equipment, net:
	Computer equipment	$	10,033		$	9,969
	Software		3,374			3,441
	Furniture, fixtures and equipment		739			734
	Leasehold improvements		1,118			1,052
	Test equipment		5,693			4,928
	Construction-in-progress		2,641			1,421
			23,598			21,545
	Less: accumulated depreciation		(14,919	)		(14,481	)
	Total	$	8,679		$	7,064

Note_4_Stockholders_Equity_Tab

Note 4 - Stockholders' Equity (Tables)	9 Months Ended
	Sep. 30, 2014
Disclosure Text Block Supplement [Abstract]	'
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]	'
		Three Months						Nine Months
		Ended September 30,						Ended September 30,
		2014			2013			2014			2013
	Cost of Design-to-silicon yield-solutions	$	947		$	812		$	2,467		$	1,995
	Research and development		426			484			1,230			1,143
	Selling, general and administrative		853			628			2,562			1,804
	Stock-based compensation expenses	$	2,226		$	1,924		$	6,259		$	4,942
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	'
		Three Months						Nine Months
		Ended September 30,						Ended September 30,
		2014			2013			2014			2013
	Expected life (in years)		4.58			4.78			4.58			4.78
	Volatility		44.88	%		50.3	%		43.45	%		55.83	%
	Risk-free interest rate		1.63	%		1.31	%		1.55	%		0.94	%
	Expected dividend		—			—			—			—
	Weighted average fair value per share of options granted during the period	$	7.54		$	9.13		$	7.44		$	7.55
		Nine Months
		Ended September 30,
		2014			2013
	Expected life (in years)		1.25			1.25
	Volatility		33.46	%		45.29	%
	Risk-free interest rate		0.21	%		0.19	%
	Expected dividend		—			—
	Weighted average fair value of purchase rights granted under the Purchase Plan	$	6.44		$	5.56
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]	'
		Number of			Weighted			Weighted			Aggregate
		Options			Average			Average			Intrinsic
		(in			Exercise			Remaining			Value
		thousands)			Price			Contractual			(in
					per Share			Term			thousands)
								(years)
	Outstanding, January 1, 2014		2,880		$	7.35
	Granted (weighted average fair value of $7.44 per share)		19		$	19.55
	Exercised		(484	)	$	6.33
	Canceled		(33	)	$	9.82
	Expired		(6	)	$	5.91
	Outstanding, September 30, 2014		2,376		$	7.63			5.96		$	12,428
	Vested and expected to vest, September 30, 2014		2,344		$	7.59			5.93		$	12,316
	Exercisable, September 30, 2014		1,762		$	7.14			5.41		$	9,895
Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]	'
		Shares			Weighted
		(in thousands)			Average
					Grant Date
					Fair Value Per
					Share
	Nonvested, January 1, 2014		759		$	14.44
	Granted		560		$	19.52
	Vested		(167	)	$	13.77
	Forfeited		(25	)	$	17.99
	Nonvested, September 30, 2014		1,127		$	17.04

Note_5_Restructuring_Tables

Note 5 - Restructuring (Tables) (October 2012 and October 2008 Plans [Member])	9 Months Ended
	Sep. 30, 2014
October 2012 and October 2008 Plans [Member]	'
Note 5 - Restructuring (Tables) [Line Items]	'
Restructuring and Related Costs [Table Text Block]	'
		Three Months					Nine Months
		Ended September 30,					Ended September 30,
		2014		2013			2014			2013
	Beginning balance	$	—	$	66		$	13		$	896
	Restructuring charges		—		8			57			67
	Cash payments		—		(25	)		(70	)		(914	)
	Ending balance	$	—	$	49		$	—		$	49
		Three Months					Nine Months
		Ended September 30,					Ended September 30,
		2014		2013			2014			2013
	Beginning balance	$	—	$	105		$	—		$	448
	Restructuring credits		—		—			—			(102	)
	Adjustments		—		—			—			3
	Cash payments		—		(105	)		—			(349	)
	Ending balance	$	—	$	—		$	—		$	—

Note_7_Net_Income_Per_Share_Ta

Note 7 - Net Income Per Share (Tables)	9 Months Ended
	Sep. 30, 2014
Earnings Per Share [Abstract]	'
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	'
		Three Months				Nine Months
		Ended September 30,				Ended September 30,
		2014		2013		2014		2013
	Numerator:
	Net income	$	1,761	$	4,824	$	12,711	$	14,107
	Denominator:
	Basic weighted average common shares outstanding		30,876		30,000		30,648		29,668
	Dilutive effect of equity incentive plans		1,203		1,623		1,327		1,530
	Diluted weighted average common shares outstanding		32,079		31,623		31,975		31,198
	Net income per share:
	Basic	$	0.06	$	0.16	$	0.41	$	0.48
	Diluted	$	0.05	$	0.15	$	0.4	$	0.45
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]	'
		Three Months				Nine Months
		Ended September 30,				Ended September 30,
		2014		2013		2014		2013
	Outstanding options		34		60		25		48
	Nonvested restricted stock units		—		—		—		1
	Employee Stock Purchase Plan		30		—		40		—
	Total		64		60		65		49

Note_8_Customer_and_Geographic1

Note 8 - Customer and Geographic Information (Tables)	9 Months Ended
	Sep. 30, 2014
Segment Reporting [Abstract]	'
Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]	'
		Three Months						Nine Months
		Ended September 30,						Ended September 30,
	Customer	2014			2013			2014			2013
	A		56	%		28	%		50	%		31	%
	B		13	%		13	%		16	%		17	%
	C		11	%		35	%		12	%		26	%
Schedule of Receivables by Major Customers [Table Text Block]	'
	Customer	September 30,			December 31,
		2014			2013
	A		46	%		36	%
	B		24	%		17	%
	C		8	%		23	%
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]	'
		Three Months Ended September 30,
		2014						2013
		Revenues			Percentage			Revenues			Percentage
					of						of
					Revenues						Revenues
	North America	$	10,529			47	%	$	7,686			30	%
	Germany		7,913			35			5,140			20
	South Korea		1,304			6			8,272			32
	Japan		479			2			2,223			9
	Rest of Asia		925			4			1,256			5
	Rest of Europe		1,256			6			912			4
	Total revenue	$	22,406			100	%	$	25,489			100	%
		Nine Months Ended September 30,
		2014						2013
		Revenues			Percentage			Revenues			Percentage
					of						of
					Revenues						Revenues
	North America	$	32,087			43	%	$	28,367			38	%
	Germany		26,046			35			15,006			20
	South Korea		4,806			6			16,816			23
	Japan		3,408			5			6,445			9
	Rest of Asia		3,643			5			4,899			7
	Rest of Europe		4,112			6			2,842			3
	Total revenue	$	74,102			100	%	$	74,375			100	%
Schedule of Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries by Country [Table Text Block]	'
		September 30,			December 31,
		2014			2013
	North America	$	8,120		$	6,578
	Asia		432			364
	Europe		127			122
	Total long-lived assets, net	$	8,679		$	7,064

Note_9_Fair_Value_Measurements1

Note 9 - Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2014
Fair Value Disclosures [Abstract]	'
Fair Value, Assets Measured on Recurring Basis [Table Text Block]	'
	Assets	Total		Quoted		Significant		Significant
				Prices		Other		Unobservable
				in		Observable		Inputs
				Active		Inputs		(Level 3)
				Markets		(Level 2)
				for
				Identical
				Assets
				(Level 1)
	Money market mutual funds	$	26,355	$	26,355	$	—	$	—
	Assets	Total		Quoted		Significant		Significant
				Prices		Other		Unobservable
				in		Observable		Inputs
				Active		Inputs		(Level 3)
				Markets		(Level 2)
				for
				Identical
				Assets
				(Level 1)
	Money market mutual funds	$	26,353	$	26,353	$	—	$	—

Note_10_Commitments_and_Contin1

Note 10 - Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]	'
	Year Ending December 31,	Amount
	2014 (remaining three months)	$	468
	2015		1,773
	2016		1,713
	2017		1,409
	2018		797
	Thereafter		61
	Total future minimum lease payments	$	6,221

Note_3_Balance_Sheet_Component2

Note 3 - Balance Sheet Components (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Note 3 - Balance Sheet Components (Details) [Line Items]	'	'	'	'	'
Unbilled Receivables, Current	$9,400,000	'	$9,400,000	'	$8,000,000
Depreciation, Depletion and Amortization, Nonproduction	500,000	400,000	1,500,000	1,000,000	'
Intangible Assets, Net (Excluding Goodwill)	0	'	0	'	31,000
Amortization of Intangible Assets	0	19,000	31,000	56,000	'
Impairment of Deferred Costs	1,892,000	'	1,892,000	'	'
Prepaid Expenses and Other Current Assets [Member]	'	'	'	'	'
Note 3 - Balance Sheet Components (Details) [Line Items]	'	'	'	'	'
Deferred Costs, Current	$100,000	'	$100,000	'	$700,000

Note_3_Balance_Sheet_Component3

Note 3 - Balance Sheet Components (Details) - Property and Equipment (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Property and equipment, net:	'	'
Property and Equipment	$23,598	$21,545
Less: accumulated depreciation	-14,919	-14,481
Total	8,679	7,064
Computer Equipment [Member]	'	'
Property and equipment, net:	'	'
Property and Equipment	10,033	9,969
Software and Software Development Costs [Member]	'	'
Property and equipment, net:	'	'
Property and Equipment	3,374	3,441
Furniture and Fixtures [Member]	'	'
Property and equipment, net:	'	'
Property and Equipment	739	734
Leasehold Improvements [Member]	'	'
Property and equipment, net:	'	'
Property and Equipment	1,118	1,052
Equipment [Member]	'	'
Property and equipment, net:	'	'
Property and Equipment	5,693	4,928
Construction in Progress [Member]	'	'
Property and equipment, net:	'	'
Property and Equipment	$2,641	$1,421

Note_4_Stockholders_Equity_Det

Note 4 - Stockholders' Equity (Details) (USD $)

3 Months Ended

9 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

34 Months Ended

3 Months Ended

9 Months Ended

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

27-May-14

Dec. 31, 2013

Nov. 08, 2012

Sep. 30, 2014

Sep. 30, 2014

Oct. 21, 2014

Dec. 31, 2013

27-May-14

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2013

Employee Stock Option [Member]

Restricted Stock [Member]

Subsequent Event [Member]

Employee Stock Purchase Plan [Member]

Shares Previously Issued Under the 2001 Plan [Member]

2011 Stock Incentive Plan [Member]

IDS Plan [Member]

2001 Stock Incentive Plan [Member]

Outside of the 2011, 2001, or IDS Plans [Member]

Employee Stock Purchase Plan [Member]

Employee Stock Purchase Plan [Member]

Employee Stock Purchase Plan [Member]

Note 4 - Stockholders' Equity (Details) [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period

'

'

'4 years

'

'

'

'

'

'

'

'

'

'4 years

'4 years

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized

'

'

'

'

6,550,000

'

'

'

'

'

'

3,500,000

'

'

'

'

'

'

'

Share Based Compensation Arrangement By Share Based Payment Award Shares Reserved Decrease Rate

'

'

1.33

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share Based Compensation Arrangement By Share Based Payment Award Expiration Term

'

'

'

'

'

'

'

'

'

'

'

'

'10 years

'10 years

'

'

'

'

'

Common Stock, Capital Shares Reserved for Future Issuance

'

'

'

'

'

'

'

'

'

'

'

'

7,000,000

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant

'

'

'

'

'

'

'

'

'

'

'

'

3,900,000

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period

'

'

33,000

'

'

'

'

'

'

'

'

'

'

'

400,000

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number

2,376,000

'

2,376,000

'

'

2,880,000

'

'

'

'

'

'

'

'

'

0

'

'

'

Share Price (in Dollars per share)

$12.61

'

$12.61

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value (in Dollars)

'

'

'

'

'

'

'

$6,500,000

'

'

'

'

'

'

'

'

'

'

'

Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized (in Dollars)

'

'

'

'

'

'

'

2,500,000

'

'

'

'

'

'

'

'

'

'

'

Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition

'

'

'

'

'

'

'

'1 year 6 months

'2 years 292 days

'

'

'

'

'

'

'

'

'1 year 36 days

'

Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value (in Dollars)

'

'

1,600,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options (in Dollars)

'

'

'

'

'

'

'

'

15,100,000

'

'

'

'

'

'

'

400,000

400,000

'

Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

10.00%

10.00%

'

Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

85.00%

'

ESPP Maximum Annual Share Replenishment

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

675,000

'

ESPP Maximum Annual Share Replenishment Percentage Of Prior Year Outstanding Company Common Stock

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2.00%

'

Stock Issued During Period, Shares, Employee Stock Purchase Plans

62,000

80,000

114,000

184,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Employee Stock Purchase Plan Weighted Average Purchase Price Of Shares Purchased (in Dollars per share)

$13.06

$9.66

$12.62

$7.16

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share-based Compensation (in Dollars)

'

'

6,259,000

4,942,000

'

'

'

'

'

'

100,000

'

'

'

'

'

100,000

500,000

500,000

Number Of ESPP Shares Available For Future Issuance

'

'

'

'

'

'

'

1,200,000

'

'

'

'

'

'

'

'

'

'

'

Stock Repurchase Program, Authorized Amount (in Dollars)

'

'

'

'

'

'

20,000,000

'

'

25,000,000

'

'

'

'

'

'

'

'

'

Stock Repurchased During Period, Shares

'

'

230,311

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Stock Repurchsed During Period Average Per Share Price (in Dollars per share)

'

'

$17.56

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Stock Repurchased During Period, Value (in Dollars)

'

'

4,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Stock Repurchase Program, Remaining Authorized Repurchase Amount (in Dollars)

$16,000,000

'

$16,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Note_4_Stockholders_Equity_Det1

Note 4 - Stockholders' Equity (Details) - Allocation of Recognized Period Costs (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]	'	'	'	'
Allocation of Recognized Period Costs	$2,226	$1,924	$6,259	$4,942
Cost of Sales [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]	'	'	'	'
Allocation of Recognized Period Costs	947	812	2,467	1,995
Research and Development Expense [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]	'	'	'	'
Allocation of Recognized Period Costs	426	484	1,230	1,143
Selling, General and Administrative Expenses [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]	'	'	'	'
Allocation of Recognized Period Costs	$853	$628	$2,562	$1,804

Note_4_Stockholders_Equity_Det2

Note 4 - Stockholders' Equity (Details) - Stock Options, Valuation Assumptions (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Note 4 - Stockholders' Equity (Details) - Stock Options, Valuation Assumptions [Line Items]	'	'	'	'
Weighted average fair value per share of options granted during the period (in Dollars per share)	'	'	$7.44	'
Employee Stock Option [Member]	'	'	'	'
Note 4 - Stockholders' Equity (Details) - Stock Options, Valuation Assumptions [Line Items]	'	'	'	'
Expected life (in years)	'4 years 211 days	'4 years 284 days	'4 years 211 days	'4 years 284 days
Volatility	44.88%	50.30%	43.45%	55.83%
Risk-free interest rate	1.63%	1.31%	1.55%	0.94%
Weighted average fair value per share of options granted during the period (in Dollars per share)	$7.54	$9.13	$7.44	$7.55
Employee Stock Purchase Plan [Member]	'	'	'	'
Note 4 - Stockholders' Equity (Details) - Stock Options, Valuation Assumptions [Line Items]	'	'	'	'
Expected life (in years)	'	'	'1 year 3 months	'1 year 3 months
Volatility	'	'	33.46%	45.29%
Risk-free interest rate	'	'	0.21%	0.19%
Weighted average fair value per share of options granted during the period (in Dollars per share)	'	'	$6.44	$5.56

Note_4_Stockholders_Equity_Det3

Note 4 - Stockholders' Equity (Details) - Stock Options Activity (USD $)	9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Stock Options Activity [Abstract]	'	'
Outstanding - Number of Options	2,376	2,880
Outstanding - Weighted Average Exercise Price per Share	$7.63	$7.35
Outstanding - Weighted Average Remaining Contractual Term	'5 years 350 days	'
Outstanding - Aggregate Intrinsic Value	$12,428	'
Vested and expected to vest, September 30, 2014	2,344	'
Vested and expected to vest, September 30, 2014	$7.59	'
Vested and expected to vest, September 30, 2014	'5 years 339 days	'
Vested and expected to vest, September 30, 2014	12,316	'
Exercisable, September 30, 2014	1,762	'
Exercisable, September 30, 2014	$7.14	'
Exercisable, September 30, 2014	'5 years 149 days	'
Exercisable, September 30, 2014	$9,895	'
Granted (weighted average fair value of $7.44 per share)	19	'
Granted (weighted average fair value of $7.44 per share)	$19.55	'
Exercised	-484	'
Exercised	$6.33	'
Canceled	-33	'
Canceled	$9.82	'
Expired	-6	'
Expired	$5.91	'

Note_4_Stockholders_Equity_Det4

Note 4 - Stockholders' Equity (Details) - Stock Options Activity (Parentheticals) (USD $)	9 Months Ended
	Sep. 30, 2014
Stock Options Activity [Abstract]	'
Granted, weighted average fair value	$7.44

Note_4_Stockholders_Equity_Det5

Note 4 - Stockholders' Equity (Details) - Nonvested Restricted Stock Units Activity (Restricted Stock Units (RSUs) [Member], USD $)	9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2014
Restricted Stock Units (RSUs) [Member]	'
Note 4 - Stockholders' Equity (Details) - Nonvested Restricted Stock Units Activity [Line Items]	'
Nonvested, January 1, 2014	759
Nonvested, January 1, 2014	$14.44
Granted	560
Granted	$19.52
Vested	-167
Vested	$13.77
Forfeited	-25
Forfeited	$17.99
Nonvested, September 30, 2014	1,127
Nonvested, September 30, 2014	$17.04

Note_5_Restructuring_Details

Note 5 - Restructuring (Details) (USD $)

3 Months Ended

9 Months Ended

9 Months Ended

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2014

Jun. 30, 2013

Dec. 31, 2012

Employee Severance [Member]

Employee Severance [Member]

Facility Closing [Member]

October 2012 Plan [Member]

October 2012 Plan [Member]

October 2012 Plan [Member]

October 2012 Plan [Member]

October 2012 Plan [Member]

October 2008 Plan [Member]

October 2008 Plan [Member]

October 2008 Plan [Member]

October 2008 Plan [Member]

October 2012 Plan [Member]

October 2008 Plan [Member]

October 2008 Plan [Member]

Note 5 - Restructuring (Details) [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Restructuring Charges

$0

$8,000

$57,000

($35,000)

'

'

'

'

'

'

'

'

($102,000)

'

'

'

Restructuring Reserve

0

'

0

'

'

'

'

'

13,000

49,000

66,000

896,000

'

'

105,000

448,000

Restructuring and Related Cost, Cost Incurred to Date

'

'

'

'

$2,100,000

$4,700,000

$2,700,000

$2,200,000

'

'

'

'

'

$7,400,000

'

'

Note_5_Restructuring_Details_S

Note 5 - Restructuring (Details) - Summary of Restructuring Liabilities (USD $)

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

October 2012 Plan [Member]

October 2012 Plan [Member]

October 2012 Plan [Member]

October 2012 Plan [Member]

October 2008 Plan [Member]

October 2008 Plan [Member]

October 2012 Plan [Member]

October 2012 Plan [Member]

October 2012 Plan [Member]

Restructuring Cost and Reserve [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

Beginning balance

'

'

'

'

$13,000

$49,000

$66,000

$896,000

$105,000

$448,000

'

'

'

Restructuring charges/credits

0

8,000

57,000

-35,000

'

'

'

'

'

-102,000

8,000

57,000

67,000

Adjustments

'

'

'

'

'

'

'

'

'

3,000

'

'

'

Payments

'

'

'

'

'

'

'

'

-105,000

-349,000

-25,000

-70,000

-914,000

Ending balance

$0

'

$0

'

$13,000

$49,000

$66,000

$896,000

'

'

'

'

'

Note_6_Income_Taxes_Details

Note 6 - Income Taxes (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Note 6 - Income Taxes (Details) [Line Items]	'	'	'	'	'
Income Tax Expense (Benefit)	$1,217,000	$2,640,000	$7,287,000	$7,279,000	'
Effective Income Tax Rate Reconciliation, Percent	'	'	36.44%	34.04%	'
Income Tax Credits and Adjustments	'	'	0	'	'
Unrecognized Tax Benefits	10,200,000	'	10,200,000	'	10,200,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	6,200,000	'	6,200,000	'	6,300,000
Unrecognized Tax Benefits In Long Term Liabilities	2,700,000	'	2,700,000	'	'
Unrecognized Tax Benefits In Deferred Tax Assets	7,900,000	'	7,900,000	'	'
Unrecognized Tax Benefits In Deferred Tax Asset Subject To Full Valuation Allowance	4,000,000	'	4,000,000	'	'
Research Tax Credit Carryforward [Member]	'	'	'	'	'
Note 6 - Income Taxes (Details) [Line Items]	'	'	'	'	'
Income Tax Credits and Adjustments	'	'	'	$400,000	'

Note_7_Net_Income_Per_Share_De

Note 7 - Net Income Per Share (Details) - Calculation of Earnings Per Share (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Numerator:	'	'	'	'
Net income (in Dollars)	$1,761	$4,824	$12,711	$14,107
Denominator:	'	'	'	'
Basic weighted average common shares outstanding	30,876	30,000	30,648	29,668
Dilutive effect of equity incentive plans	1,203	1,623	1,327	1,530
Diluted weighted average common shares outstanding	32,079	31,623	31,975	31,198
Net income per share:	'	'	'	'
Basic (in Dollars per share)	$0.06	$0.16	$0.41	$0.48
Diluted (in Dollars per share)	$0.05	$0.15	$0.40	$0.45

Note_7_Net_Income_Per_Share_De1

Note 7 - Net Income Per Share (Details) - Antidilutive Securities	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Antidilutive Securities	64	60	65	49
Equity Option [Member]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Antidilutive Securities	34	60	25	48
Restricted Stock Units (RSUs), Nonvested [Member]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Antidilutive Securities	'	'	'	1
Employee Stock Purchase Plan [Member]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Antidilutive Securities	30	'	40	'

Note_8_Customer_and_Geographic2

Note 8 - Customer and Geographic Information (Details)	9 Months Ended
	Sep. 30, 2014
Note 8 - Customer and Geographic Information (Details) [Line Items]	'
Number of Operating Segments	1
Accounts Receivable [Member]	'
Note 8 - Customer and Geographic Information (Details) [Line Items]	'
Concentration Risk, Percentage	10.00%
Customer Concentration Risk [Member]	'
Note 8 - Customer and Geographic Information (Details) [Line Items]	'
Concentration Risk, Percentage	10.00%

Note_8_Customer_and_Geographic3

Note 8 - Customer and Geographic Information (Details) - Revenue Percentage by Major Customers (Customer Concentration Risk [Member])	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenue, Major Customer [Line Items]	'	'	'	'
Revenue Percentage by Major Customers	'	'	10.00%	'
Customer A [Member] | Sales Revenue, Net [Member]	'	'	'	'
Revenue, Major Customer [Line Items]	'	'	'	'
Revenue Percentage by Major Customers	56.00%	28.00%	50.00%	31.00%
Customer B [Member] | Sales Revenue, Net [Member]	'	'	'	'
Revenue, Major Customer [Line Items]	'	'	'	'
Revenue Percentage by Major Customers	13.00%	13.00%	16.00%	17.00%
Customer C [Member] | Sales Revenue, Net [Member]	'	'	'	'
Revenue, Major Customer [Line Items]	'	'	'	'
Revenue Percentage by Major Customers	11.00%	35.00%	12.00%	26.00%

Note_8_Customer_and_Geographic4

Note 8 - Customer and Geographic Information (Details) - Receivables Percentage by Major Customers	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Customer A [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]	'	'
Note 8 - Customer and Geographic Information (Details) - Receivables Percentage by Major Customers [Line Items]	'	'
Customer Concentration Risk, Receivables	46.00%	36.00%
Customer B [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]	'	'
Note 8 - Customer and Geographic Information (Details) - Receivables Percentage by Major Customers [Line Items]	'	'
Customer Concentration Risk, Receivables	24.00%	17.00%
Customer C [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]	'	'
Note 8 - Customer and Geographic Information (Details) - Receivables Percentage by Major Customers [Line Items]	'	'
Customer Concentration Risk, Receivables	8.00%	23.00%
Accounts Receivable [Member]	'	'
Note 8 - Customer and Geographic Information (Details) - Receivables Percentage by Major Customers [Line Items]	'	'
Customer Concentration Risk, Receivables	10.00%	'
Customer Concentration Risk [Member]	'	'
Note 8 - Customer and Geographic Information (Details) - Receivables Percentage by Major Customers [Line Items]	'	'
Customer Concentration Risk, Receivables	10.00%	'

Note_8_Customer_and_Geographic5

Note 8 - Customer and Geographic Information (Details) - Revenues by Geographic Area (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Note 8 - Customer and Geographic Information (Details) - Revenues by Geographic Area [Line Items]	'	'	'	'
Revenues	$22,406	$25,489	$74,102	$74,375
Sales Revenue, Net [Member] | Geographic Concentration Risk [Member] | North America [Member]	'	'	'	'
Note 8 - Customer and Geographic Information (Details) - Revenues by Geographic Area [Line Items]	'	'	'	'
Revenues	10,529	7,686	32,087	28,367
Concentration Risk Percentage	47.00%	30.00%	43.00%	38.00%
Sales Revenue, Net [Member] | Geographic Concentration Risk [Member] | GERMANY	'	'	'	'
Note 8 - Customer and Geographic Information (Details) - Revenues by Geographic Area [Line Items]	'	'	'	'
Revenues	7,913	5,140	26,046	15,006
Concentration Risk Percentage	35.00%	20.00%	35.00%	20.00%
Sales Revenue, Net [Member] | Geographic Concentration Risk [Member] | KOREA, REPUBLIC OF	'	'	'	'
Note 8 - Customer and Geographic Information (Details) - Revenues by Geographic Area [Line Items]	'	'	'	'
Revenues	1,304	8,272	4,806	16,816
Concentration Risk Percentage	6.00%	32.00%	6.00%	23.00%
Sales Revenue, Net [Member] | Geographic Concentration Risk [Member] | JAPAN	'	'	'	'
Note 8 - Customer and Geographic Information (Details) - Revenues by Geographic Area [Line Items]	'	'	'	'
Revenues	479	2,223	3,408	6,445
Concentration Risk Percentage	2.00%	9.00%	5.00%	9.00%
Sales Revenue, Net [Member] | Geographic Concentration Risk [Member] | Rest of Asia [Member]	'	'	'	'
Note 8 - Customer and Geographic Information (Details) - Revenues by Geographic Area [Line Items]	'	'	'	'
Revenues	925	1,256	3,643	4,899
Concentration Risk Percentage	4.00%	5.00%	5.00%	7.00%
Sales Revenue, Net [Member] | Geographic Concentration Risk [Member] | Rest of Europe [Member]	'	'	'	'
Note 8 - Customer and Geographic Information (Details) - Revenues by Geographic Area [Line Items]	'	'	'	'
Revenues	1,256	912	4,112	2,842
Concentration Risk Percentage	6.00%	4.00%	6.00%	3.00%
Sales Revenue, Net [Member] | Geographic Concentration Risk [Member]	'	'	'	'
Note 8 - Customer and Geographic Information (Details) - Revenues by Geographic Area [Line Items]	'	'	'	'
Revenues	$22,406	$25,489	$74,102	$74,375
Concentration Risk Percentage	100.00%	100.00%	100.00%	100.00%

Note_8_Customer_and_Geographic6

Note 8 - Customer and Geographic Information (Details) - Long-lived Assets by Geographic Area (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Note 8 - Customer and Geographic Information (Details) - Long-lived Assets by Geographic Area [Line Items]	'	'
Long-lived assets, net, by geographical area	$8,679	$7,064
North America [Member]	'	'
Note 8 - Customer and Geographic Information (Details) - Long-lived Assets by Geographic Area [Line Items]	'	'
Long-lived assets, net, by geographical area	8,120	6,578
Asia [Member]	'	'
Note 8 - Customer and Geographic Information (Details) - Long-lived Assets by Geographic Area [Line Items]	'	'
Long-lived assets, net, by geographical area	432	364
Europe [Member]	'	'
Note 8 - Customer and Geographic Information (Details) - Long-lived Assets by Geographic Area [Line Items]	'	'
Long-lived assets, net, by geographical area	$127	$122

Note_9_Fair_Value_Measurements2

Note 9 - Fair Value Measurements (Details) (Foreign Exchange Contract [Member], USD $)	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2014
Note 9 - Fair Value Measurements (Details) [Line Items]	'	'
Derivative, Number of Instruments Held	1	1
Derivative Asset, Notional Amount	$6,700,000	$6,700,000
Other Income Expense [Member]	'	'
Note 9 - Fair Value Measurements (Details) [Line Items]	'	'
Derivative, Gain (Loss) on Derivative, Net	-500,000	-600,000
Other Current Liabilities [Member]	'	'
Note 9 - Fair Value Measurements (Details) [Line Items]	'	'
Derivative Liability, Current	$41,000	$41,000

Note_9_Fair_Value_Measurements3

Note 9 - Fair Value Measurements (Details) - Fair Value, Assets Measured on Recurring Basis (Money Market Mutual Funds [Member], USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Note 9 - Fair Value Measurements (Details) - Fair Value, Assets Measured on Recurring Basis [Line Items]	'	'
Assets at fair value	$26,355	$26,353
Fair Value, Inputs, Level 1 [Member]	'	'
Note 9 - Fair Value Measurements (Details) - Fair Value, Assets Measured on Recurring Basis [Line Items]	'	'
Assets at fair value	$26,355	$26,353

Note_10_Commitments_and_Contin2

Note 10 - Commitments and Contingencies (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Commitments and Contingencies Disclosure [Abstract]	'	'	'	'
Operating Leases, Rent Expense, Net	$500,000	$0.50	$1,500,000	$1,500,000
Loss Contingency, Loss in Period	'	'	0	'
Loss Contingency Accrual	$0	'	$0	'

Note_10_Commitments_and_Contin3

Note 10 - Commitments and Contingencies (Details) - Future Minimum Lease Payments Under Noncancelable Operating Leases (USD $)	Sep. 30, 2014
In Thousands, unless otherwise specified
Future Minimum Lease Payments Under Noncancelable Operating Leases [Abstract]	'
2014 (remaining three months)	$468
2015	1,773
2016	1,713
2017	1,409
2018	797
Thereafter	61
Total future minimum lease payments	$6,221