Lattice Semiconductor (LSCC) 10-Q 5 Nov 13 2013 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 28, 2013	Nov. 01, 2013
Document Information [Line Items]	'	'
Entity Registrant Name	'LATTICE SEMICONDUCTOR CORP	'
Entity Central Index Key	'0000855658	'
Document Type	'10-Q	'
Document Period End Date	28-Sep-13	'
Amendment Flag	'false	'
Document Fiscal Year Focus	'2013	'
Document Fiscal Period Focus	'Q3	'
Current Fiscal Year End Date	'--12-28	'
Entity Filer Category	'Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	116,343,059

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Revenue	$87,154	$70,889	$243,006	$213,381
Costs and expenses:	'	'	'	'
Cost of products sold	40,778	32,341	113,365	98,297
Research and development	20,254	20,446	58,635	58,955
Selling, general and administrative	16,385	17,720	49,955	55,048
Acquisition related charges, including amortization of intangible assets	737	729	2,223	3,418
Restructuring charges	85	0	257	643
Costs and expenses	78,239	71,236	224,435	216,361
Income (loss) from operations	8,915	-347	18,571	-2,980
Other income, net	346	88	240	846
Income (loss) before income taxes	9,261	-259	18,811	-2,134
Provision for income taxes	417	1,916	3,037	20,297
Net Income (loss)	8,844	-2,175	15,774	-22,431
Net Income (loss) per share:	'	'	'	'
Basic (in dollars per share)	$0.08	($0.02)	$0.14	($0.19)
Diluted (in dollars per share)	$0.08	($0.02)	$0.13	($0.19)
Shares used in per share calculations:	'	'	'	'
Basic (in shares)	116,055	116,785	115,730	117,612
Diluted (in shares)	117,349	116,785	117,093	117,612
Comprehensive Income (loss):	'	'	'	'
Net Income (loss)	8,844	-2,175	15,774	-22,431
Other comprehensive income:	'	'	'	'
Unrealized gain (loss) related to marketable securities, net	221	39	-11	17
Less: reclassification adjustment for losses (gains) included in other income, net	1	0	303	-78
Translation adjustment	225	-15	-205	244
Comprehensive Income (loss)	$9,291	($2,151)	$15,861	($22,248)

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Sep. 28, 2013	Dec. 29, 2012
In Thousands, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$120,770	$118,536
Short-term marketable securities	90,002	64,865
Accounts receivable, net	52,991	46,947
Inventories	42,295	44,194
Prepaid expenses and other current assets	14,631	12,527
Total current assets	320,689	287,069
Property and equipment, less accumulated depreciation	42,345	40,384
Long-term marketable securities	4,717	4,717
Other long-term assets	7,199	6,854
Intangible assets, net of amortization	13,220	15,430
Goodwill	44,808	44,808
Deferred income taxes	13,746	15,357
Total assets	446,724	414,619
Current liabilities:	'	'
Accounts payable and accrued expenses	33,318	36,391
Accrued payroll obligations	11,106	6,149
Deferred income and allowances on sales to sell-through distributors	17,587	10,553
Total current liabilities	62,011	53,093
Long-term liabilities	5,011	3,976
Total liabilities	67,022	57,069
Commitments and contingencies	'	'
Stockholders' equity:	'	'
Preferred stock, $.01 par value, 10,000,000 shares authorized, none issued and outstanding	0	0
Common stock, $.01 par value, 300,000,000 shares authorized, 116,281,446 and 115,500,000 shares issued and outstanding	1,163	1,155
Paid-in capital	627,756	621,170
Accumulated other comprehensive loss	-477	-261
Accumulated deficit	-248,740	-264,514
Total stockholders' equity	379,702	357,550
Total liabilities and stockholders' equity	$446,724	$414,619

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets Parentheticals (USD $)	Sep. 28, 2013	Dec. 29, 2012
Statement of Financial Position [Abstract]	'	'
Preferred stock, par value per share (in dollars per share)	$0.01	$0.01
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value per share (in dollars per share)	$0.01	$0.01
Common stock, shares authorized	300,000,000	300,000,000
Common stock, shares issued	116,281,446	115,500,000
Common stock, shares outstanding	116,281,446	115,500,000

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Cash Flows (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 28, 2013	Sep. 29, 2012
Cash flows from operating activities:	'	'
Net Income (loss)	$15,774	($22,431)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:	'	'
Depreciation and amortization	15,173	16,162
Change in deferred income tax provision	1,886	19,307
Gain on sale or maturity of marketable securities, net	0	-393
Stock-based compensation	6,985	5,753
Changes in assets and liabilities:	'	'
Accounts receivable, net	-6,044	-19,027
Inventories	1,899	-151
Prepaid expenses and other assets	-2,177	-351
Accounts payable and accrued expenses (includes restructuring)	-1,354	1,763
Accrued payroll obligations	4,957	-1,635
Deferred income and allowances on sales to sell-through distributors	7,034	422
Net cash provided by (used in) operating activities	44,133	-581
Cash flows from investing activities:	'	'
Proceeds from sales or maturities of marketable securities	39,176	47,404
Purchase of marketable securities	-64,303	-24,049
Capital expenditures	-10,237	-11,230
Other investing activities, primarily time based software licenses	-5,939	-4,838
Net cash (used in) provided by investing activities	-41,303	7,287
Cash flows from financing activities:	'	'
Net share settlement upon issuance of RSUs	-581	-735
Purchase of treasury stock	-2,452	-12,360
Net proceeds from issuance of common stock	2,642	2,970
Net cash used in financing activities	-391	-10,125
Effect of exchange rate change on cash	-205	246
Net increase (decrease) in cash and cash equivalents	2,234	-3,173
Beginning cash and cash equivalents	118,536	141,423
Ending cash and cash equivalents	120,770	138,250
Supplemental disclosures of non-cash investing and financing activities:	'	'
Unrealized (loss) gain related to marketable securities, net, included in Accumulated other comprehensive income (loss)	-11	17
Income taxes paid, net of refunds	1,081	736
Distribution of deferred compensation from trust assets	$53	$196

Basis_of_Presentation_and_Sign

Basis of Presentation and Significant Accounting Policies	9 Months Ended
	Sep. 28, 2013
Accounting Policies [Abstract]	'
Basis of Presentation and Significant Accounting Policies	'
	Basis of Presentation and Significant Accounting Policies:
	The accompanying Condensed Consolidated Financial Statements are unaudited and have been prepared by Lattice Semiconductor Corporation (“Lattice,” the “Company,” “we,” “us” or “our”) pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”) and in our opinion include all adjustments, consisting of normal recurring adjustments, necessary for the fair statement of results for the interim periods. Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles ("U.S. GAAP") have been condensed or omitted pursuant to such rules and regulations. These Condensed Consolidated Financial Statements should be read in conjunction with our audited financial statements and notes thereto included in our Annual Report on Form 10-K for the fiscal year ended December 29, 2012.
	We report based on a 52 or 53-week fiscal year ending on the Saturday closest to December 31. Our third quarter of fiscal 2013 and third quarter of fiscal 2012 ended on September 28, 2013 and September 29, 2012, respectively. All references to quarterly, three or nine months ended financial results are references to the results for the relevant fiscal period.
	Principles of Consolidation
	The accompanying Condensed Consolidated Financial Statements include the accounts of Lattice and its subsidiaries, all of which are wholly-owned, after the elimination of all intercompany balances and transactions. Certain balances in prior fiscal years have been reclassified to conform to the presentation adopted in the current year.
	Cash Equivalents and Marketable Securities
	We consider all investments that are readily convertible into cash and have original maturities of three months or less, to be cash equivalents. Cash equivalents consist primarily of highly liquid investments in time deposits or money market accounts and are carried at cost. We account for marketable securities as available for sale with unrealized gains or losses recorded to Accumulated other comprehensive income (loss), unless losses are considered other-than-temporary, in which case, losses are charged to the Condensed Consolidated Statements of Operations and Comprehensive Income (Loss).
	Fair Value of Financial Instruments
	We invest in various financial instruments including corporate and government bonds, notes, commercial paper and auction rate securities. The Company values these instruments at their fair value and monitors their portfolio for impairment on a periodic basis. In the event that the carrying value of an investment exceeds its fair value and the decline in value is determined to be other than temporary, the Company records an impairment charge and establishes a new carrying value. We assess other-than-temporary impairment of marketable securities in accordance with Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 820, “Fair Value Measurements and Disclosures.” The framework under the provisions of ASC 820 establishes three levels of inputs that may be used to measure fair value. Each level of input has different levels of subjectivity and difficulty involved in determining fair value.
	Level 1 instruments are characterized generally by quoted prices for identical assets or liabilities in active markets. Therefore, determining fair value for Level 1 instruments generally does not require significant management judgment, and the estimation is not difficult.
	Level 2 instruments include inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices for identical instruments in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.
	Level 3 instruments include unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Our auction rate securities are classified as Level 3 instruments. Management uses a combination of the market and income approach to derive the fair value of auction rate securities, which includes third party valuation results, investment broker provided market information and available information on the credit quality of the underlying collateral. As a result, the determination of fair value for Level 3 instruments requires significant management judgment and subjectivity. Our Level 3 instruments are classified as Long-term marketable securities on our Condensed Consolidated Balance Sheets and are entirely made up of auction rate securities that consist of student loan asset-backed notes. Such loans are insured by the federal government or guaranteed by the Federal Family Educational Loan Program ("FFELP"). Fair value measurement may be sensitive to various unobservable inputs such as the ability of students to repay their loans, or change in the provision of government guarantees policy toward guaranteeing loan repayment. If students are unable to pay back their loans or the government changes its policy, our investments may be further impaired.
	Foreign Exchange and Translation of Foreign Currencies
	We have international subsidiary and branch operations. In addition, a portion of our silicon wafer and other purchases are denominated in Japanese yen and we bill certain Japanese customers in yen. Gains or losses from foreign exchange rate fluctuations on balances denominated in foreign currencies are reflected in Other income, net. Realized and unrealized gains or losses on foreign currency transactions were not significant for the periods presented. We translate accounts denominated in foreign currencies in accordance with ASC 830, “Foreign Currency Matters,” using the current rate method under which asset and liability accounts are translated at the current rate, while stockholders' equity accounts are translated at the appropriate historical rates, and revenue and expense accounts are translated at average monthly exchange rates. Translation adjustments related to the consolidation of foreign subsidiary financial statements are reflected in Accumulated other comprehensive income (loss) in Stockholders' equity.
	Derivative Financial Instruments
	At September 28, 2013 and December 29, 2012, we had open foreign exchange contracts of 120,000,000 JPY and 150,000,000 JPY, respectively. The contracts outstanding at September 28, 2013 and December 29, 2012 were settled in October 2013 and January 2013, respectively. Although such hedges mitigate our foreign currency exchange rate exposure from an economic perspective, they were not designated as "effective" hedges for accounting purposes and are adjusted to fair value through earnings, with an impact of less than $0.1 million for the periods reported. We do not hold or issue derivative financial instruments for trading or speculative purposes.
	Concentration Risk
	Potential exposure to concentration risk consists primarily of cash and cash equivalents, marketable securities, trade receivables and supply of wafers for our new products. We place our investments primarily through three financial institutions and mitigate the concentration of credit risk by limiting the maximum portion of the investment portfolio which may be invested in any one instrument. The Company's investment policy defines approved credit ratings for investment securities. Investments on-hand consisted primarily of money market instruments, “AA” or better corporate notes and bonds and commercial paper, and U.S. government agency obligations. See Note 4 for a discussion of the liquidity attributes of our marketable securities.
	Concentration of credit risk with respect to trade receivables is mitigated by a geographically diverse customer base and our credit and collection process. Accounts receivable do not bear interest, and are shown net of allowances for doubtful accounts of $0.9 million and $1.1 million at September 28, 2013 and December 29, 2012, respectively. We perform credit evaluations for essentially all customers and secure transactions with letters of credit or advance payments where appropriate. We regularly review our allowance for doubtful accounts and the aging of our accounts receivable. Write-offs for uncollected trade receivables have not been significant to date.
	We rely on a limited number of foundries for our wafer purchases including: Fujitsu Limited, Seiko Epson Corporation, Taiwan Semiconductor Manufacturing Company, Ltd, United Microelectronics Corporation, and GLOBALFOUNDRIES.
	Revenue Recognition and Deferred Income
	We sell our products directly to end customers or through a network of independent manufacturers' representatives and indirectly through a network of independent sell-in and sell-through distributors. Distributors provide periodic data regarding the product, price, quantity, and end customer when products are resold, as well as the quantities of our products they still have in stock.
	Revenue from sales to original equipment manufacturers ("OEMs") or sell-in distributors is recognized upon shipment. Revenue from sales by our sell-through distributors is recognized at the time of reported resale. Under both types of revenue recognition, persuasive evidence of an arrangement exists, the price is fixed or determinable, title has transferred, collection of resulting receivables is reasonably assured, and there are no remaining customer acceptance requirements and no remaining significant performance obligations.
	Orders from our sell-through distributors are initially recorded at published list prices; however, for a majority of our sales, the final selling price is determined at the time of resale and in accordance with a distributor price agreement. In certain circumstances, we allow sell-through distributors to return unsold products. At times, we protect our sell-through distributors against reductions in published list prices. For these reasons, we do not recognize revenue until products are resold by sell-through distributors to an end customer.
	For sell-through distributors, at the time of shipment to distributors, we (a) record Accounts receivable, net at published list price since there is a legally enforceable obligation from the distributor to pay us currently for product delivered, (b) relieve inventory for the carrying value of goods shipped since legal title has passed to the distributor, and (c) record deferred revenue and deferred cost of sales in Deferred income and allowances on sales to sell-through distributors in the liability section of our Condensed Consolidated Balance Sheets. The final price is set at the time of resale and is determined in accordance with a distributor price agreement. Revenue and cost of products sold to sell-through distributors are deferred until either the product is resold by the distributor or, in certain cases, return privileges terminate, at which time Revenue and Cost of products sold are reflected in Net Income (loss), and Accounts receivable, net are adjusted to reflect the final selling price.
	The components of Deferred income and allowances on sales to sell-through distributors are presented in the following table (in thousands):
		September 28,			December 29,
		2013			2012
	Inventory valued at published list price and held by sell-through distributors with right of return	$	51,891		$	38,623
	Allowance for distributor advances	(27,880		)	(22,450		)
	Deferred cost of sales related to inventory held by sell-through distributors	(6,424		)	(5,620		)
	Total Deferred income and allowances on sales to sell-through distributors	$	17,587		$	10,553
	A significant portion of our year-to-date revenue in fiscal 2013 has been from sell-through distributors. Resale of products by sell-through distributors as a percentage of total revenue was 41% and 44% for the three and nine months ended September 28, 2013, respectively, and 56% and 55% for the three and nine months ended September 29, 2012, respectively.
	We must use estimates and apply judgment to reconcile sell-through distributors' reported inventories to their activities. Errors in our estimates or judgments could result in inaccurate reporting of our Revenue, Cost of products sold, Deferred income and allowances on sales to sell-through distributors, and Net Income (loss).
	Use of Estimates
	The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts and classification of assets, such as marketable securities, accounts receivable, inventory, auction rate securities, goodwill (including the assessment of reporting unit), intangible assets, current and deferred income taxes, accrued liabilities (including restructuring charges and bonus arrangements), deferred income and allowances on sales to sell-through distributors, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the fiscal periods presented. Actual results could differ from those estimates.

New_Accounting_Pronouncements

New Accounting Pronouncements	9 Months Ended
	Sep. 28, 2013
Accounting Changes and Error Corrections [Abstract]	'
New Accounting Pronouncements	'
	New Accounting Pronouncements:
	In June 2013, the Emerging Issues Task Force reached consensus on ASU 2013-11 Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists. The consensus requires companies to present the unrecognized tax benefit as a reduction of the Deferred tax asset for a Net Operating Loss ("NOL") or similar tax loss, or tax credit carryforward rather than as a liability when the uncertain tax position would reduce the NOL or other carryforward under the tax law. We early adopted this requirement in June 2013 with retrospective application as permitted by the standard. Amounts presented in prior periods have been reclassified to conform. This resulted in both long-term taxes payable and deferred tax assets declining by approximately $14 million for all periods presented.

Net_Income_Loss_Per_Share

Net Income (Loss) Per Share	9 Months Ended
	Sep. 28, 2013
Earnings Per Share [Abstract]	'
Net Income (Loss) Per Share	'
	Net income (loss) Per Share:
	We compute basic net income (loss) per share by dividing net income (loss) available to common stockholders by the weighted average number of common shares outstanding during the period. To determine diluted share count, we apply the treasury stock method to determine the dilutive effect of outstanding stock option shares, restricted stock units ("RSUs"), and Employee Stock Purchase Plan ("ESPP") shares. Our application of the treasury stock method includes, as assumed proceeds, the average unamortized stock-based compensation expense for the period and the impact of the pro forma deferred tax benefit or cost associated with stock-based compensation expense.
	A reconciliation of basic and diluted Net income (loss) per share is presented below (in thousands, except per share data):
		Three Months Ended					Nine Months Ended
		September 28,		September 29,			September 28,		September 29,
		2013		2012			2013		2012
	Basic and diluted Net Income (loss)	$	8,844	$	(2,175	)	$	15,774	$	(22,431	)
	Shares used in basic Net Income (loss) per share	116,055		116,785			115,730		117,612
	Dilutive effect of stock options, RSUs and ESPP shares	1,294		—			1,363		—
	Shares used in diluted Net Income (loss) per share	117,349		116,785			117,093		117,612
	Basic Net Income (loss) per share	$	0.08	$	(0.02	)	$	0.14	$	(0.19	)
	Diluted Net Income (loss) per share	$	0.08	$	(0.02	)	$	0.13	$	(0.19	)
	The computation of diluted Net income per share for the three and nine months ended September 28, 2013, includes the effects of stock options, RSUs and ESPP shares aggregating approximately 1.3 million shares and 1.4 million shares, respectively, as they are dilutive, and excludes the effects of stock options, RSUs and ESPP shares aggregating approximately 8.6 million shares and 8.5 million shares, respectively, as they are antidilutive. The computation of diluted Net loss per share for both the three and nine months ended September 29, 2012 excludes the effects of stock options, RSUs and ESPP shares aggregating approximately 11.3 million shares, as they are antidilutive. Stock options, RSUs and ESPP shares are considered antidilutive when the aggregate of exercise price, unrecognized stock-based compensation expense and excess tax benefit are greater than the average market price for our common stock during the period or when the Company is in a net loss position, as the effects would reduce the loss per share. Stock options and RSUs that are dilutive in the third quarter and first nine months of fiscal 2013 could become antidilutive in the future.

Marketable_Securities

Marketable Securities	9 Months Ended
	Sep. 28, 2013
Investments, Debt and Equity Securities [Abstract]	'
Marketable Securities	'
	Marketable Securities:
	The following table summarizes the contractual maturities of our marketable securities (at fair value and in thousands):
		September 28,		December 29,
		2013		2012
	Short-term marketable securities:
	Maturities of less than five years	$	90,002	$	64,865
	Long-term marketable securities:
	Maturities of more than ten years	4,717		4,717
	Total marketable securities	$	94,719	$	69,582
	The following table summarizes the composition of our marketable securities (at fair value and in thousands):
		September 28,		December 29,
		2013		2012
	Short-term marketable securities:
	Corporate and government bonds and notes and commercial paper	$	90,002	$	64,865
	Long-term marketable securities:
	Federally-insured or FFELP guaranteed student loans	4,717		4,717
	Total marketable securities	$	94,719	$	69,582
	The following table summarizes the composition of our auction rate securities (in thousands):
		28-Sep-13					29-Dec-12
		Par Value		Fair Value		S&P	Par Value		Fair Value		S&P
						Credit					Credit
						rating					rating
	Long-term marketable securities:
	Federally-insured or FFELP guaranteed student loans	$	5,700	$	4,717	AA+	$	5,700	$	4,717	AA+
	Total auction rate securities	$	5,700	$	4,717		$	5,700	$	4,717
	At September 28, 2013, due to continued multiple failed auctions and a determination of illiquidity, the auction rate securities held by us are classified as Long-term marketable securities. These auction rate securities are exposed to risks associated with student loan asset-backed notes. Such loans are insured by the federal government or guaranteed by the FFELP. We intend to sell our auction rate securities as markets for these securities resume or reasonable offers become available.

Fair_Value_of_Financial_Instru

Fair Value of Financial Instruments	9 Months Ended
	Sep. 28, 2013
Fair Value Disclosures [Abstract]	'
Fair Value of Financial Instruments	'
	Fair Value of Financial Instruments (in thousands):
		Fair value measurements as of											Fair value measurements as of
		28-Sep-13											December 29, 2012
		Total			Level 1			Level 2			Level 3		Total			Level 1		Level 2			Level 3
	Short-term marketable securities	$	90,002		$	90,002		$	—		$	—	$	64,865		$	64,865	$	—		$	—
	Long-term marketable securities	4,717			—			—			4,717		4,717			—		—			4,717
	Foreign currency forward exchange contracts	(13		)	—			(13		)	—		(5		)	—		(5		)	—
	Total fair value of financial instruments	$	94,706		$	90,002		$	(13	)	$	4,717	$	69,577		$	64,865	$	(5	)	$	4,717
	We invest in various financial instruments including corporate and government bonds and notes, commercial paper and auction rate securities. In addition, we enter into foreign currency forward exchange contracts to mitigate our foreign currency exchange rate exposure. We carry these instruments at their fair value in accordance with ASC 820. The framework under the provisions of ASC 820 establishes three levels of inputs that may be used to measure fair value. Each level of input has different levels of subjectivity and difficulty involved in determining fair value.
	Level 1 instruments generally represent quoted prices for identical assets or liabilities in active markets. Therefore, determining fair value for Level 1 instruments generally does not require significant management judgment, and the estimation is not difficult. Our Level 1 instruments consist of federal agency, corporate notes and bonds, and commercial paper that are traded in active markets and are classified as Short-term marketable securities on our Condensed Consolidated Balance Sheets.
	Level 2 instruments include inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices for identical instruments in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.
	Level 3 instruments include unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Our auction rate securities are classified as Level 3 instruments. Management uses a combination of the market and income approach to derive the fair value of auction rate securities, which include third party valuation results, investment broker provided market information and available information on the credit quality of the underlying collateral. As a result, the determination of fair value for Level 3 instruments requires significant management judgment and subjectivity. Our Level 3 instruments are classified as Long-term marketable securities on our Condensed Consolidated Balance Sheets and are entirely made up of auction rate securities that consist of student loan asset-backed notes. Such loans are insured by the federal government or guaranteed by the FFELP. Fair value measurement may be sensitive to various unobservable inputs such as the ability of students to repay their loans, or change in the provision of government guarantees policy toward guaranteeing loan repayment. If students are unable to pay back their loans or the government changes its policy, our investments may be further impaired.
	There were no transfers between Levels 1 and 2 during the first nine months ended fiscal 2013 or 2012. There were no transfers into or out of Level 3 during the first nine months ended fiscal 2013 or 2012.
	During the nine months ended September 28, 2013 and September 29, 2012, the following changes occurred in our Level 3 instruments (in thousands):
		Nine Months Ended
		September 28,			September 29,
		2013			2012
	Beginning fair value of Long-term marketable securities	$	4,717		$	6,946
	Fair value of securities sold or redeemed	—			(2,285		)
	Ending fair value of Long-term marketable securities	$	4,717		$	4,661
	In accordance with ASC 320, “Investments-Debt and Equity Securities,” we recorded an unrealized loss of less than $0.1 million during the nine months ended September 28, 2013, and an unrealized gain of less than $0.1 million during the nine months ended September 29, 2012, on certain Short-term marketable securities (Level 1 instruments), which has been recorded in Accumulated other comprehensive income (loss). Future fluctuations in fair value related to these instruments that the Company deems to be temporary, including any recoveries of previous write-downs, would be recorded to Accumulated other comprehensive loss. If we were to determine in the future that any further decline in fair value is other-than-temporary, we would record an impairment charge, which could have a materially detrimental impact on our operating results. If we were to liquidate our position in these securities, it is likely that the amount of any future realized gain or loss would be different from the unrealized gain or loss reported in Accumulated other comprehensive income (loss) or the previously reported other-than-temporary impairment charge.

Inventories

Inventories	9 Months Ended
	Sep. 28, 2013
Inventory, Net [Abstract]	'
Inventories	'
	Inventories (in thousands):
		September 28,		December 29,
		2013		2012
	Work in progress	$	26,081	$	27,915
	Finished goods	16,214		16,279
	Total inventories	$	42,295	$	44,194

Business_Combinations_and_Good

Business Combinations and Goodwill	9 Months Ended
	Sep. 28, 2013
Business Combinations [Abstract]	'
Business Combinations and Goodwill	'
	Business Combinations and Goodwill:
	In December 2011, we acquired SiliconBlue Technologies Ltd. ("SiliconBlue") for $63.2 million in cash. Of the total purchase price, $43.9 million was allocated to goodwill, $18.5 million was allocated to intangible assets, and the remaining to net tangible assets acquired. The goodwill and identifiable intangible assets are not deductible for tax purposes. SiliconBlue was consolidated into our financial statements beginning in December 2011.
	Inventories were recorded at their estimated fair value ("step-up"), which represented an amount equivalent to estimated selling prices less fulfillment costs and a normative selling profit. The step-up of $0.3 million was charged to Acquisition related charges during the six months ended June 30, 2012, approximating the estimated inventory turnover for this particular product.
	In July 2011, we acquired substantially all of the assets of Rise Technology Development Limited ("Rise"), for $1.0 million in cash.  Of the purchase price, $0.9 million was allocated to goodwill and the remaining to net tangible assets acquired.
	No impairment charges relating to goodwill and intangible assets were recorded for the first nine months of 2013 or 2012.

Intangible_Assets_and_Acquisit

Intangible Assets and Acquisition Related Charges	9 Months Ended
	Sep. 28, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'
Intangible Assets and Acquisition Related Charges	'
	Intangible Assets and Acquisition Related Charges:
	In connection with our acquisition of SiliconBlue in December 2011, we recorded identifiable intangible assets related to developed technology and customer relationships based on guidance for determining fair value under the provisions of ASC 820. The following table summarizes the details of our total purchased intangible assets (in thousands):
		Weighted Average Amortization Period	Gross		Accumulated Amortization			Intangible assets, net of amortization September 28, 2013
		(in years)
	Developed technology	7	$	10,700	$	(2,739	)	$	7,961
	Customer relationships	5.5	7,800		(2,541		)	5,259
	Total	6.3	$	18,500	$	(5,280	)	$	13,220
	Amortization expense associated with these intangible assets is reported as Acquisition related charges, including the amortization of intangible assets in the Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) and amounted to $0.7 million in each of the third quarters of the fiscal years ended 2013 and 2012. We expect amortization expense related to these intangible assets to approximate $2.9 million each year in fiscal years 2013 - 2016, $2.2 million in 2017, and $1.5 million in 2018.
	Acquisition related charges, including amortization of intangible assets in the Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) also include severance and professional fees related to the acquisition, as well as the amortization of the stepped-up value of inventory, collectively amounting to $0.2 million in the third quarter of the fiscal year 2012.

Changes_in_Stockholders_Equity

Changes in Stockholders' Equity and Accumulated Other Comprehensive Loss	9 Months Ended
	Sep. 28, 2013
Stockholders' Equity Note [Abstract]	'
Changes in Stockholders' Equity and Accumulated other Comprehensive Loss	'
	Changes in Stockholders' Equity and Accumulated Other Comprehensive Loss (in thousands):
		Common			Paid-in			Treasury			Accumu-			Accumu-			Total
		stock			capital			stock			lated			lated
											deficit			other
														compre-
														hensive
														loss
	Balances, December 29, 2012	$	1,155		$	621,170		$	—		$	(264,514	)	$	(261	)	$	357,550
	Net Income for the nine months ended September 28, 2013	—			—			—			15,774			—			15,774
	Unrealized loss related to marketable securities, net	—			—			—			—			(11		)	(11		)
	Translation adjustments	—			—			—			—			(205		)	(205		)
	Common stock issued in connection with the exercise of stock options, ESPP and vested RSUs (net of taxes)	14			2,047			—			—			—			2,061
	Stock repurchase	—			—			(2,452		)	—			—			(2,452		)
	Retirement of treasury stock	(6		)	(2,446		)	2,452			—			—			—
	Stock-based compensation expense related to stock options, ESPP and RSUs	—			6,985			—			—			—			6,985
	Balances, September 28, 2013	$	1,163		$	627,756		$	—		$	(248,740	)	$	(477	)	$	379,702
	On February 24, 2012, our Board of Directors approved a stock repurchase program pursuant to which up to $20.0 million of outstanding common stock may be repurchased from time to time. The duration of the repurchase program was twelve months. The 2012 program was completed during the first quarter of fiscal 2013, with the repurchase of approximately 0.6 million shares for $2.5 million.
	On February 27, 2013, our Board of Directors approved a stock repurchase program pursuant to which up to $20.0 million of outstanding common stock may be repurchased from time to time. The duration of the repurchase program is twelve months. No shares were repurchased under this program during the nine months ended September 28, 2013. We expect that all future repurchases will be open market transactions funded from available working capital.

Income_Taxes

Income Taxes	9 Months Ended
	Sep. 28, 2013
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	Income Taxes:
	For the three months ended September 28, 2013 and September 29, 2012, we recorded an income tax provision of approximately $0.4 million and $1.9 million, respectively. For the nine months ended September 28, 2013 and September 29, 2012, we recorded an income tax provision of approximately $3.0 million and $20.3 million, respectively. The income tax provision for the three and nine months ended September 28, 2013 represents tax at the federal, state and foreign statutory tax rates adjusted for non-deductible stock compensation, withholding taxes, changes in uncertain tax positions as well as other non-deductible items in foreign jurisdictions. The difference between the U.S. federal statutory tax rate of 35% and our effective tax rate is primarily due to income earned in lower tax rate jurisdictions, for which no U.S. income tax has been provided, as we intend to permanently reinvest these earnings outside of the United States.
	On December 31, 2011, we began to implement a global tax structure to more effectively align our corporate structure with the geographic business operations including responsibility for sales and manufacturing activities. As part of this tax restructuring, we created new and realigned existing legal entities, completed intercompany sales of rights to intellectual property, inventory and fixed assets across different tax jurisdictions, and implemented cost-sharing and intellectual property licensing and royalty agreements between our U.S. and foreign entities.
	The global tax structure was completed during the first quarter of 2012 upon the intercompany sale of inventory and fixed assets. During 2012, this inventory was sold to end customers in the ordinary course of business resulting in income before taxes in the United States and a loss before taxes in certain foreign jurisdictions. Because these foreign jurisdictions have 0% income tax rates, we received no tax benefit associated with the losses resulting in a significant foreign rate differential. Taxes were applied to the U.S. income resulting from the intercompany sale based on U.S. statutory rates, offset by deferred tax assets. This resulted in an increase to the effective tax rate and a net income tax provision of $1.9 million and $20.3 million during the three and nine months ended September 29, 2012, respectively.
	We are subject to federal income tax as well as income tax of multiple state and foreign jurisdictions. We are no longer subject to federal, state and local, or foreign income tax examinations for years before 2010, 2008 and 2007, respectively. However, "NOL" and credit carryforwards from all years are subject to examination and adjustments for at least three years following the year in which the attributes are used. Our 2011 federal income tax return is currently under examination. We are not under examination in any other tax jurisdictions.
	We believe that it is reasonably possible that $0.3 million of unrecognized tax benefits and $0.3 million of associated interest and penalties could be recognized during the next twelve months. The $0.6 million potential change would represent a decrease in unrecognized tax benefits, comprised of items related to state income tax credits claimed and foreign tax filings for years that will no longer be subject to examination under expiring statutes of limitations.
	We have federal net operating loss carryforwards that expire at various dates between 2023 and 2032. We have state net operating loss carryforwards that expire at various dates from 2013 through 2032. We also have federal and state credit carryforwards, some of which do not expire, with the remainder expiring at various dates from 2013 through 2032.
	We are paying foreign income taxes, which are reflected in the Provision for income taxes in our Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) and are primarily related to the cost of operating offshore subsidiaries. We are not currently paying federal income taxes and do not expect to pay such taxes until our tax net operating loss and credit carryforwards are fully utilized. We expect to pay a nominal amount of state income tax. We accrue interest and penalties related to uncertain tax positions in the Provision for income taxes.
	The American Taxpayer Relief Act of 2012, which reinstated the U.S. federal research and development tax credit retroactively from January 1, 2012 through December 31, 2013, was enacted into law during the three months ended March 30, 2013. The tax benefit resulting from the reinstatement of the federal research and development tax credit was offset by a valuation allowance and therefore did not impact our annual effective tax rate.

Restructuring

Restructuring	9 Months Ended
	Sep. 28, 2013
Restructuring and Related Activities [Abstract]	'
Restructuring	'
	Restructuring:
	In October 2012, our Board of Directors adopted the "2012 restructuring plan." In connection with this restructuring plan, we reduced our headcount by approximately 110 employees and eliminated certain sites, including sites in Pennsylvania and Illinois. In connection with this action, we recorded restructuring charges of less than $0.1 million in the third quarter of fiscal 2013. The 2012 restructuring plan was substantially completed during the first quarter of fiscal 2013.
	In 2011, our Board of Directors adopted the "2011 restructuring plan" to more efficiently implement our product development cycle and streamline supply chain activities. The 2011 restructuring plan was completed during the second quarter of 2012.
	The following table displays the activity related to the restructuring plans described above (in thousands):
		Severance and related			Lease termination			Other			Total
	Balance at December 31, 2011	$	1,543		$	26		$	—		$	1,569
	Restructuring Charges	296			—			465			761
	Cash Payments	(1,735		)	(12		)	(465		)	(2,212		)
	Adjustments to prior restructuring costs	(104		)	(14		)	—			(118		)
	Balance at September 29, 2012	$	—		$	—		$	—		$	—
	Balance at December 29, 2012	$	2,373		$	793		$	258		$	3,424
	Restructuring Charges	105			224			245			574
	Cash Payments	(2,312		)	(571		)	(220		)	(3,103		)
	Adjustments to prior restructuring costs	(150		)	(99		)	(68		)	(317		)
	Balance at September 28, 2013	$	16		$	347		$	215		$	578
	We cannot be certain as to the actual amount of any remaining restructuring charges or the timing of their recognition for financial reporting purposes.

StockBased_Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 28, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Stock-Based Compensation	'
	Stock-Based Compensation:
	Total stock-based compensation expense included in our Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) was as follows (in thousands):
		Three Months Ended				Nine Months Ended
		September 28,		September 29,		September 28,		September 29,
		2013		2012		2013		2012
	Line item:
	Cost of products sold	$	171	$	139	$	460	$	388
	Research and development	1,058		834		2,871		2,273
	Selling, general and administrative	1,333		1,102		3,654		3,092
	Total stock-based compensation	$	2,562	$	2,075	$	6,985	$	5,753

Legal_Matters

Legal Matters	9 Months Ended
	Sep. 28, 2013
Legal Matters Disclosure [Abstract]	'
Legal Matters	'
	Legal Matters:
	On June 11, 2007, a patent infringement lawsuit was filed by Lizy K. John (“John”) against us in the U.S. District Court for the Eastern District of Texas, Marshall Division. In the complaint, John seeks an injunction, unspecified damages, and attorneys' fees and expenses. We filed a request for re-examination of the patent by the U.S. Patent and Trademark Office (“PTO”), which was granted by the PTO. The litigation was stayed pending the results of the re-examination. After the re-examination concluded, the stay was lifted on January 1, 2012, and the lawsuit was transferred by consent of the parties to the Northern District of California. We also filed a request for a second re-examination of the patent, which was granted and is still pending. Discovery is open and proceeding. Trial is scheduled for December 8, 2014. At this stage of the proceedings, we do not have an estimate of the likelihood or the amount of any potential exposure to us. We believe we possess defenses to these claims and intend to vigorously defend this litigation. It is reasonably possible that the actual losses may exceed our accrued liabilities, however, we cannot currently estimate such amount.
	We are also exposed to certain other asserted and unasserted potential claims. There can be no assurance that, with respect to potential claims made against us, we could resolve such claims under terms and conditions that would not have a material adverse effect on our business, our liquidity or our financial results. Periodically, we review the status of each significant matter and assess its potential financial exposure. If the potential loss from any claim or legal proceeding is considered probable and a range of possible losses can be estimated, we then accrue a liability for the estimated loss based on the provisions of FASB ASC 450, “Contingencies" (“ASC 450”). Legal proceedings are subject to uncertainties, and the outcomes are difficult to predict. Because of such uncertainties, accruals are based only on the best information available at the time. As additional information becomes available, we reassess the potential liability related to pending claims and litigation and may revise estimates. Presently, no accrual has been estimated under ASC 450 for potential losses that may or may not arise from the current lawsuits in which we are involved.

Segment_and_Geographic_Informa

Segment and Geographic Information	9 Months Ended
	Sep. 28, 2013
Segment Reporting Information, Additional Information [Abstract]	'
Segment and Geographic Information	'
	Segment and Geographic Information:
	We operate in one industry segment comprising the design, development, manufacture and marketing of programmable logic products. Our revenue by major geographic area based on ship-to location was as follows (dollars in thousands):
		Three Months Ended								Nine Months Ended
		September 28, 2013				September 29, 2012				September 28, 2013				September 29, 2012
	Asia	$	66,191	76	%	$	48,861	69	%	$	177,848	73	%	$	144,396	68	%
	Europe	11,857		14		12,424		17		36,665		15		37,736		18
	Americas	9,106		10		9,604		14		28,493		12		31,249		14
	Total revenue	$	87,154	100	%	$	70,889	100	%	$	243,006	100	%	$	213,381	100	%

Basis_of_Presentation_and_Sign1

Basis of Presentation and Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 28, 2013
Accounting Policies [Abstract]	'
Fiscal Period	'
	We report based on a 52 or 53-week fiscal year ending on the Saturday closest to December 31. Our third quarter of fiscal 2013 and third quarter of fiscal 2012 ended on September 28, 2013 and September 29, 2012, respectively. All references to quarterly, three or nine months ended financial results are references to the results for the relevant fiscal period.
Principles of Consolidation	'
	Principles of Consolidation
	The accompanying Condensed Consolidated Financial Statements include the accounts of Lattice and its subsidiaries, all of which are wholly-owned, after the elimination of all intercompany balances and transactions. Certain balances in prior fiscal years have been reclassified to conform to the presentation adopted in the current year.
Cash Equivalents	'
	We consider all investments that are readily convertible into cash and have original maturities of three months or less, to be cash equivalents. Cash equivalents consist primarily of highly liquid investments in time deposits or money market accounts and are carried at cost.
Marketable Securities	'
	We account for marketable securities as available for sale with unrealized gains or losses recorded to Accumulated other comprehensive income (loss), unless losses are considered other-than-temporary, in which case, losses are charged to the Condensed Consolidated Statements of Operations and Comprehensive Income (Loss).
Fair Value of Financial Instruments	'
	Fair Value of Financial Instruments
	We invest in various financial instruments including corporate and government bonds, notes, commercial paper and auction rate securities. The Company values these instruments at their fair value and monitors their portfolio for impairment on a periodic basis. In the event that the carrying value of an investment exceeds its fair value and the decline in value is determined to be other than temporary, the Company records an impairment charge and establishes a new carrying value. We assess other-than-temporary impairment of marketable securities in accordance with Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 820, “Fair Value Measurements and Disclosures.” The framework under the provisions of ASC 820 establishes three levels of inputs that may be used to measure fair value. Each level of input has different levels of subjectivity and difficulty involved in determining fair value.
	Level 1 instruments are characterized generally by quoted prices for identical assets or liabilities in active markets. Therefore, determining fair value for Level 1 instruments generally does not require significant management judgment, and the estimation is not difficult.
	Level 2 instruments include inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices for identical instruments in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.
	Level 3 instruments include unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Our auction rate securities are classified as Level 3 instruments. Management uses a combination of the market and income approach to derive the fair value of auction rate securities, which includes third party valuation results, investment broker provided market information and available information on the credit quality of the underlying collateral. As a result, the determination of fair value for Level 3 instruments requires significant management judgment and subjectivity. Our Level 3 instruments are classified as Long-term marketable securities on our Condensed Consolidated Balance Sheets and are entirely made up of auction rate securities that consist of student loan asset-backed notes. Such loans are insured by the federal government or guaranteed by the Federal Family Educational Loan Program ("FFELP"). Fair value measurement may be sensitive to various unobservable inputs such as the ability of students to repay their loans, or change in the provision of government guarantees policy toward guaranteeing loan repayment. If students are unable to pay back their loans or the government changes its policy, our investments may be further impaired.
Foreign Exchange and Translation of Foreign Currencies	'
	Foreign Exchange and Translation of Foreign Currencies
	We have international subsidiary and branch operations. In addition, a portion of our silicon wafer and other purchases are denominated in Japanese yen and we bill certain Japanese customers in yen. Gains or losses from foreign exchange rate fluctuations on balances denominated in foreign currencies are reflected in Other income, net. Realized and unrealized gains or losses on foreign currency transactions were not significant for the periods presented. We translate accounts denominated in foreign currencies in accordance with ASC 830, “Foreign Currency Matters,” using the current rate method under which asset and liability accounts are translated at the current rate, while stockholders' equity accounts are translated at the appropriate historical rates, and revenue and expense accounts are translated at average monthly exchange rates. Translation adjustments related to the consolidation of foreign subsidiary financial statements are reflected in Accumulated other comprehensive income (loss) in Stockholders' equity.
Derivative Financial Instruments	'
	Derivative Financial Instruments
	At September 28, 2013 and December 29, 2012, we had open foreign exchange contracts of 120,000,000 JPY and 150,000,000 JPY, respectively. The contracts outstanding at September 28, 2013 and December 29, 2012 were settled in October 2013 and January 2013, respectively. Although such hedges mitigate our foreign currency exchange rate exposure from an economic perspective, they were not designated as "effective" hedges for accounting purposes and are adjusted to fair value through earnings, with an impact of less than $0.1 million for the periods reported. We do not hold or issue derivative financial instruments for trading or speculative purposes.
Concentration Risk	'
	Concentration Risk
	Potential exposure to concentration risk consists primarily of cash and cash equivalents, marketable securities, trade receivables and supply of wafers for our new products. We place our investments primarily through three financial institutions and mitigate the concentration of credit risk by limiting the maximum portion of the investment portfolio which may be invested in any one instrument. The Company's investment policy defines approved credit ratings for investment securities. Investments on-hand consisted primarily of money market instruments, “AA” or better corporate notes and bonds and commercial paper, and U.S. government agency obligations. See Note 4 for a discussion of the liquidity attributes of our marketable securities.
	Concentration of credit risk with respect to trade receivables is mitigated by a geographically diverse customer base and our credit and collection process. Accounts receivable do not bear interest, and are shown net of allowances for doubtful accounts of $0.9 million and $1.1 million at September 28, 2013 and December 29, 2012, respectively. We perform credit evaluations for essentially all customers and secure transactions with letters of credit or advance payments where appropriate. We regularly review our allowance for doubtful accounts and the aging of our accounts receivable. Write-offs for uncollected trade receivables have not been significant to date.
	We rely on a limited number of foundries for our wafer purchases including: Fujitsu Limited, Seiko Epson Corporation, Taiwan Semiconductor Manufacturing Company, Ltd, United Microelectronics Corporation, and GLOBALFOUNDRIES.
Revenue Recognition and Deferred Income	'
	Revenue Recognition and Deferred Income
	We sell our products directly to end customers or through a network of independent manufacturers' representatives and indirectly through a network of independent sell-in and sell-through distributors. Distributors provide periodic data regarding the product, price, quantity, and end customer when products are resold, as well as the quantities of our products they still have in stock.
	Revenue from sales to original equipment manufacturers ("OEMs") or sell-in distributors is recognized upon shipment. Revenue from sales by our sell-through distributors is recognized at the time of reported resale. Under both types of revenue recognition, persuasive evidence of an arrangement exists, the price is fixed or determinable, title has transferred, collection of resulting receivables is reasonably assured, and there are no remaining customer acceptance requirements and no remaining significant performance obligations.
	Orders from our sell-through distributors are initially recorded at published list prices; however, for a majority of our sales, the final selling price is determined at the time of resale and in accordance with a distributor price agreement. In certain circumstances, we allow sell-through distributors to return unsold products. At times, we protect our sell-through distributors against reductions in published list prices. For these reasons, we do not recognize revenue until products are resold by sell-through distributors to an end customer.
	For sell-through distributors, at the time of shipment to distributors, we (a) record Accounts receivable, net at published list price since there is a legally enforceable obligation from the distributor to pay us currently for product delivered, (b) relieve inventory for the carrying value of goods shipped since legal title has passed to the distributor, and (c) record deferred revenue and deferred cost of sales in Deferred income and allowances on sales to sell-through distributors in the liability section of our Condensed Consolidated Balance Sheets. The final price is set at the time of resale and is determined in accordance with a distributor price agreement. Revenue and cost of products sold to sell-through distributors are deferred until either the product is resold by the distributor or, in certain cases, return privileges terminate, at which time Revenue and Cost of products sold are reflected in Net Income (loss), and Accounts receivable, net are adjusted to reflect the final selling price.
	The components of Deferred income and allowances on sales to sell-through distributors are presented in the following table (in thousands):
		September 28,			December 29,
		2013			2012
	Inventory valued at published list price and held by sell-through distributors with right of return	$	51,891		$	38,623
	Allowance for distributor advances	(27,880		)	(22,450		)
	Deferred cost of sales related to inventory held by sell-through distributors	(6,424		)	(5,620		)
	Total Deferred income and allowances on sales to sell-through distributors	$	17,587		$	10,553
	A significant portion of our year-to-date revenue in fiscal 2013 has been from sell-through distributors. Resale of products by sell-through distributors as a percentage of total revenue was 41% and 44% for the three and nine months ended September 28, 2013, respectively, and 56% and 55% for the three and nine months ended September 29, 2012, respectively.
	We must use estimates and apply judgment to reconcile sell-through distributors' reported inventories to their activities. Errors in our estimates or judgments could result in inaccurate reporting of our Revenue, Cost of products sold, Deferred income and allowances on sales to sell-through distributors, and Net Income (loss).
Use of Estimates	'
	Use of Estimates
	The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts and classification of assets, such as marketable securities, accounts receivable, inventory, auction rate securities, goodwill (including the assessment of reporting unit), intangible assets, current and deferred income taxes, accrued liabilities (including restructuring charges and bonus arrangements), deferred income and allowances on sales to sell-through distributors, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the fiscal periods presented. Actual results could differ from those estimates.
New Accounting Pronouncements	'
	New Accounting Pronouncements:
	In June 2013, the Emerging Issues Task Force reached consensus on ASU 2013-11 Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists. The consensus requires companies to present the unrecognized tax benefit as a reduction of the Deferred tax asset for a Net Operating Loss ("NOL") or similar tax loss, or tax credit carryforward rather than as a liability when the uncertain tax position would reduce the NOL or other carryforward under the tax law. We early adopted this requirement in June 2013 with retrospective application as permitted by the standard. Amounts presented in prior periods have been reclassified to conform. This resulted in both long-term taxes payable and deferred tax assets declining by approximately $14 million for all periods presented.

Basis_of_Presentation_and_Sign2

Basis of Presentation and Significant Accounting Policies (Tables)	9 Months Ended
	Sep. 28, 2013
Accounting Policies [Abstract]	'
Deferred Income and Allowances on Sales to Sell-through Distributors	'
	The components of Deferred income and allowances on sales to sell-through distributors are presented in the following table (in thousands):
		September 28,			December 29,
		2013			2012
	Inventory valued at published list price and held by sell-through distributors with right of return	$	51,891		$	38,623
	Allowance for distributor advances	(27,880		)	(22,450		)
	Deferred cost of sales related to inventory held by sell-through distributors	(6,424		)	(5,620		)
	Total Deferred income and allowances on sales to sell-through distributors	$	17,587		$	10,553

Net_Income_Loss_Per_Share_Tabl

Net Income (Loss) Per Share (Tables)	9 Months Ended
	Sep. 28, 2013
Earnings Per Share [Abstract]	'
Schedule of Earnings Per Share Reconciliation	'
	A reconciliation of basic and diluted Net income (loss) per share is presented below (in thousands, except per share data):
		Three Months Ended					Nine Months Ended
		September 28,		September 29,			September 28,		September 29,
		2013		2012			2013		2012
	Basic and diluted Net Income (loss)	$	8,844	$	(2,175	)	$	15,774	$	(22,431	)
	Shares used in basic Net Income (loss) per share	116,055		116,785			115,730		117,612
	Dilutive effect of stock options, RSUs and ESPP shares	1,294		—			1,363		—
	Shares used in diluted Net Income (loss) per share	117,349		116,785			117,093		117,612
	Basic Net Income (loss) per share	$	0.08	$	(0.02	)	$	0.14	$	(0.19	)
	Diluted Net Income (loss) per share	$	0.08	$	(0.02	)	$	0.13	$	(0.19	)

Marketable_Securities_Tables

Marketable Securities (Tables)	9 Months Ended
	Sep. 28, 2013
Investments, Debt and Equity Securities [Abstract]	'
Schedule of Contractual Maturities of Marketable Securities	'
	The following table summarizes the contractual maturities of our marketable securities (at fair value and in thousands):
		September 28,		December 29,
		2013		2012
	Short-term marketable securities:
	Maturities of less than five years	$	90,002	$	64,865
	Long-term marketable securities:
	Maturities of more than ten years	4,717		4,717
	Total marketable securities	$	94,719	$	69,582
Schedule of Composition of Marketable Securities	'
	The following table summarizes the composition of our marketable securities (at fair value and in thousands):
		September 28,		December 29,
		2013		2012
	Short-term marketable securities:
	Corporate and government bonds and notes and commercial paper	$	90,002	$	64,865
	Long-term marketable securities:
	Federally-insured or FFELP guaranteed student loans	4,717		4,717
	Total marketable securities	$	94,719	$	69,582
Schedule of Composition of Auction Rate Securities	'
	The following table summarizes the composition of our auction rate securities (in thousands):
		28-Sep-13					29-Dec-12
		Par Value		Fair Value		S&P	Par Value		Fair Value		S&P
						Credit					Credit
						rating					rating
	Long-term marketable securities:
	Federally-insured or FFELP guaranteed student loans	$	5,700	$	4,717	AA+	$	5,700	$	4,717	AA+
	Total auction rate securities	$	5,700	$	4,717		$	5,700	$	4,717

Fair_Value_of_Financial_Instru1

Fair Value of Financial Instruments (Tables)	9 Months Ended
	Sep. 28, 2013
Fair Value Disclosures [Abstract]	'
Schedule of Fair Value of Financial Instruments	'
		Fair value measurements as of											Fair value measurements as of
		28-Sep-13											December 29, 2012
		Total			Level 1			Level 2			Level 3		Total			Level 1		Level 2			Level 3
	Short-term marketable securities	$	90,002		$	90,002		$	—		$	—	$	64,865		$	64,865	$	—		$	—
	Long-term marketable securities	4,717			—			—			4,717		4,717			—		—			4,717
	Foreign currency forward exchange contracts	(13		)	—			(13		)	—		(5		)	—		(5		)	—
	Total fair value of financial instruments	$	94,706		$	90,002		$	(13	)	$	4,717	$	69,577		$	64,865	$	(5	)	$	4,717
Schedule of Changes In Level 3 Instruments	'
	During the nine months ended September 28, 2013 and September 29, 2012, the following changes occurred in our Level 3 instruments (in thousands):
		Nine Months Ended
		September 28,			September 29,
		2013			2012
	Beginning fair value of Long-term marketable securities	$	4,717		$	6,946
	Fair value of securities sold or redeemed	—			(2,285		)
	Ending fair value of Long-term marketable securities	$	4,717		$	4,661

Inventories_Tables

Inventories (Tables)	9 Months Ended
	Sep. 28, 2013
Inventory Disclosure [Abstract]	'
Schedule of Inventories	'
		September 28,		December 29,
		2013		2012
	Work in progress	$	26,081	$	27,915
	Finished goods	16,214		16,279
	Total inventories	$	42,295	$	44,194

Intangible_Assets_and_Acquisit1

Intangible Assets and Acquisition Related Charges (Tables) (SiliconBlue Technologies Ltd.)	9 Months Ended
	Sep. 28, 2013
SiliconBlue Technologies Ltd.	'
Business Acquisition [Line Items]	'
Schedule of Finite-Lived Intangible Assets	'
	The following table summarizes the details of our total purchased intangible assets (in thousands):
		Weighted Average Amortization Period	Gross		Accumulated Amortization			Intangible assets, net of amortization September 28, 2013
		(in years)
	Developed technology	7	$	10,700	$	(2,739	)	$	7,961
	Customer relationships	5.5	7,800		(2,541		)	5,259
	Total	6.3	$	18,500	$	(5,280	)	$	13,220

Changes_in_Stockholders_Equity1

Changes in Stockholders' Equity and Accumulated Other Comprehensive Loss (Tables)	9 Months Ended
	Sep. 28, 2013
Stockholders' Equity Note [Abstract]	'
Schedule of Changes in Stockholders' Equity and Accumulated other Comprehensive Loss	'
	Changes in Stockholders' Equity and Accumulated Other Comprehensive Loss (in thousands):
		Common			Paid-in			Treasury			Accumu-			Accumu-			Total
		stock			capital			stock			lated			lated
											deficit			other
														compre-
														hensive
														loss
	Balances, December 29, 2012	$	1,155		$	621,170		$	—		$	(264,514	)	$	(261	)	$	357,550
	Net Income for the nine months ended September 28, 2013	—			—			—			15,774			—			15,774
	Unrealized loss related to marketable securities, net	—			—			—			—			(11		)	(11		)
	Translation adjustments	—			—			—			—			(205		)	(205		)
	Common stock issued in connection with the exercise of stock options, ESPP and vested RSUs (net of taxes)	14			2,047			—			—			—			2,061
	Stock repurchase	—			—			(2,452		)	—			—			(2,452		)
	Retirement of treasury stock	(6		)	(2,446		)	2,452			—			—			—
	Stock-based compensation expense related to stock options, ESPP and RSUs	—			6,985			—			—			—			6,985
	Balances, September 28, 2013	$	1,163		$	627,756		$	—		$	(248,740	)	$	(477	)	$	379,702

Restructuring_Tables

Restructuring (Tables)	9 Months Ended
	Sep. 28, 2013
Restructuring and Related Activities [Abstract]	'
Schedule of Restructuring Reserve by Type of Cost	'
	The following table displays the activity related to the restructuring plans described above (in thousands):
		Severance and related			Lease termination			Other			Total
	Balance at December 31, 2011	$	1,543		$	26		$	—		$	1,569
	Restructuring Charges	296			—			465			761
	Cash Payments	(1,735		)	(12		)	(465		)	(2,212		)
	Adjustments to prior restructuring costs	(104		)	(14		)	—			(118		)
	Balance at September 29, 2012	$	—		$	—		$	—		$	—
	Balance at December 29, 2012	$	2,373		$	793		$	258		$	3,424
	Restructuring Charges	105			224			245			574
	Cash Payments	(2,312		)	(571		)	(220		)	(3,103		)
	Adjustments to prior restructuring costs	(150		)	(99		)	(68		)	(317		)
	Balance at September 28, 2013	$	16		$	347		$	215		$	578

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 28, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Schedule of Stock-Based Compensation Expense	'
	Total stock-based compensation expense included in our Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) was as follows (in thousands):
		Three Months Ended				Nine Months Ended
		September 28,		September 29,		September 28,		September 29,
		2013		2012		2013		2012
	Line item:
	Cost of products sold	$	171	$	139	$	460	$	388
	Research and development	1,058		834		2,871		2,273
	Selling, general and administrative	1,333		1,102		3,654		3,092
	Total stock-based compensation	$	2,562	$	2,075	$	6,985	$	5,753

Segment_and_Geographic_Informa1

Segment and Geographic Information (Tables)	9 Months Ended
	Sep. 28, 2013
Segment Reporting [Abstract]	'
Schedule of Revenue by Major Geographic Area	'
	Our revenue by major geographic area based on ship-to location was as follows (dollars in thousands):
		Three Months Ended								Nine Months Ended
		September 28, 2013				September 29, 2012				September 28, 2013				September 29, 2012
	Asia	$	66,191	76	%	$	48,861	69	%	$	177,848	73	%	$	144,396	68	%
	Europe	11,857		14		12,424		17		36,665		15		37,736		18
	Americas	9,106		10		9,604		14		28,493		12		31,249		14
	Total revenue	$	87,154	100	%	$	70,889	100	%	$	243,006	100	%	$	213,381	100	%

Basis_of_Presentation_and_Sign3

Basis of Presentation and Significant Accounting Policies (Details)

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

9 Months Ended

Sep. 28, 2013

Sep. 29, 2012

Sep. 28, 2013

Sep. 29, 2012

Dec. 29, 2012

Sep. 28, 2013

Sep. 29, 2012

Sep. 28, 2013

Sep. 29, 2012

Sep. 28, 2013

Dec. 29, 2012

Sep. 28, 2013

Sep. 28, 2013

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

Sales Revenue

Sales Revenue

Sales Revenue

Sales Revenue

Not designated as effective hedges for accounting purposes

Not designated as effective hedges for accounting purposes

Minimum

Maximum

Sell-Through Distributors

Sell-Through Distributors

Sell-Through Distributors

Sell-Through Distributors

Foreign exchange contracts

Foreign exchange contracts

JPY (¥)

JPY (¥)

Basis of Presentation and Significant Accounting Policies [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

Fiscal year duration (52 weeks or 53 weeks)

'

'

'

'

'

'

'

'

'

'

'

'364 days

'371 days

Term of maturities of investments considered cash and cash equivalents

'

'

'

'

'

'

'

'

'

'

'

'

'3 months

General Discussion of Derivative Instruments and Hedging Activities [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

Open foreign exchange contracts - notional amounts

'

'

'

'

'

'

'

'

'

¥ 120,000,000

¥ 150,000,000

'

'

Gain on foreign exchange contracts adjusted to fair value through earnings - less than

100,000

100,000

100,000

100,000

'

'

'

'

'

'

'

'

'

Risks and Uncertainties [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

Allowance for doubtful accounts

900,000

'

900,000

'

1,100,000

'

'

'

'

'

'

'

'

Resale of product by sell-through distributors as a percentage of total revenue

'

'

'

'

'

41.00%

56.00%

44.00%

55.00%

'

'

'

'

Deferred Revenue and Credits [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

Inventory valued at published list price and held by sell-through distributors with right of return

51,891,000

'

51,891,000

'

38,623,000

'

'

'

'

'

'

'

'

Allowance for distributor advances

-27,880,000

'

-27,880,000

'

-22,450,000

'

'

'

'

'

'

'

'

Deferred cost of sales related to inventory held by sell-through distributors

-6,424,000

'

-6,424,000

'

-5,620,000

'

'

'

'

'

'

'

'

Total Deferred income and allowances on sales to sell-through distributors

$17,587,000

'

$17,587,000

'

$10,553,000

'

'

'

'

'

'

'

'

New_Accounting_Pronouncements_

New Accounting Pronouncements (Details) (USD $)	9 Months Ended			12 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Dec. 29, 2012
			Effect of early adoption of ASU 2013-11	Effect of early adoption of ASU 2013-11
New Accounting Pronouncement, Early Adoption [Line Items]	'	'	'	'
Decrease in long-term taxes payable	'	'	$14,000,000	$14,000,000
Change in deferred income tax provision	$1,886,000	$19,307,000	$14,000,000	$14,000,000

Net_Income_Loss_Per_Share_Deta

Net Income (Loss) Per Share (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Earnings Per Share [Abstract]	'	'	'	'
Basic and diluted Net Income (Loss)	$8,844	($2,175)	$15,774	($22,431)
Shares used in basic Net Income (Loss) per share (in shares)	116,055,000	116,785,000	115,730,000	117,612,000
Dilutive effect of stock options, RSUs and ESPP shares (in shares)	1,294,000	0	1,363,000	0
Shares used in diluted Net Income (Loss) per share (in shares)	117,349,000	116,785,000	117,093,000	117,612,000
Basic Net Income (Loss) per share (in dollars per share)	$0.08	($0.02)	$0.14	($0.19)
Diluted Net Income (Loss) per share (in dollars per share)	$0.08	($0.02)	$0.13	($0.19)
Stock options, RSU's and ESPP shares	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Antidilutive securities excluded from computation of EPS (in shares)	8,600,000	11,300,000	8,500,000	11,300,000

Marketable_Securities_Composit

Marketable Securities Composition (Details) (USD $)	Sep. 28, 2013	Dec. 29, 2012
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'	'
Maturities of less than five years	$90,002	$64,865
Maturities of more than ten years	4,717	4,717
Total marketable securities	94,719	69,582
Federally-insured or FFELP guaranteed student loan auction rate securities	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Total marketable securities	4,717	4,717
Short-term marketable securities | Corporate and government bonds and notes and commercial paper	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Total marketable securities	90,002	64,865
Long-term marketable securities | Federally-insured or FFELP guaranteed student loan auction rate securities	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Total marketable securities	$4,717	$4,717

Marketable_Securities_Auction_

Marketable Securities Auction Rate (Details) (USD $)	Sep. 28, 2013	Dec. 29, 2012
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'	'
Fair Value	$94,719	$69,582
Total Auction Rate Securities	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Par Value	5,700	5,700
Fair Value	4,717	4,717
Federally-insured or FFELP guaranteed student loan auction rate securities	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Par Value	5,700	5,700
Fair Value	$4,717	$4,717

Fair_Value_of_Financial_Instru2

Fair Value of Financial Instruments (Details) (USD $)	Sep. 28, 2013	Dec. 29, 2012
In Thousands, unless otherwise specified
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Fair value of marketable securities	$94,719	$69,582
Level 1	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Foreign currency forward exchange contracts	0	0
Total fair value of financial instruments	90,002	64,865
Level 1 | Short-term marketable securities	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Fair value of marketable securities	90,002	64,865
Level 1 | Long-term marketable securities	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Fair value of marketable securities	0	0
Level 2	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Foreign currency forward exchange contracts	-13	-5
Total fair value of financial instruments	-13	-5
Level 2 | Short-term marketable securities	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Fair value of marketable securities	0	0
Level 2 | Long-term marketable securities	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Fair value of marketable securities	0	0
Level 3	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Foreign currency forward exchange contracts	0	0
Total fair value of financial instruments	4,717	4,717
Level 3 | Short-term marketable securities	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Fair value of marketable securities	0	0
Level 3 | Long-term marketable securities	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Fair value of marketable securities	4,717	4,717
Total	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Foreign currency forward exchange contracts	-13	-5
Total fair value of financial instruments	94,706	69,577
Total | Short-term marketable securities	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Fair value of marketable securities	90,002	64,865
Total | Long-term marketable securities	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Fair value of marketable securities	$4,717	$4,717

Fair_Value_of_Financial_Instru3

Fair Value of Financial Instruments Unobservable Inputs (Details) (USD $)	9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012
Short-term marketable securities | Maximum	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'	'
Unrealized gain - less than	$100,000	$100,000
Level 3	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'	'
Beginning fair value of Long-term marketable securities	4,717,000	6,946,000
Fair value of securities sold or redeemed	0	-2,285,000
Ending fair value of Long-term marketable securities	$4,717,000	$4,661,000

Inventories_Details

Inventories (Details) (USD $)	Sep. 28, 2013	Dec. 29, 2012
In Thousands, unless otherwise specified
Inventory Disclosure [Abstract]	'	'
Work in progress	$26,081	$27,915
Finished goods	16,214	16,279
Total inventories	$42,295	$44,194

Business_Combinations_and_Good1

Business Combinations and Goodwill (Details) (USD $)	9 Months Ended			1 Months Ended	6 Months Ended	1 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Dec. 29, 2012	Dec. 31, 2011	Jun. 30, 2012	Jul. 31, 2011
				SiliconBlue Technologies Ltd.	SiliconBlue Technologies Ltd.	Rise Technology Development Limited
Business Acquisition [Line Items]	'	'	'	'	'	'
Cash purchase price	'	'	'	$63,200,000	'	$1,000,000
Goodwill	44,808,000	'	44,808,000	43,900,000	'	900,000
Acquired intangible assets	'	'	'	18,500,000	'	'
Step-up in inventory	'	'	'	'	300,000	'
Impairment charges related to goodwill and intangible assets	$0	$0	'	'	'	'

Intangible_Assets_and_Acquisit2

Intangible Assets and Acquisition Related Charges (Details) (SiliconBlue Technologies Ltd., USD $)	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013
Finite-Lived Intangible Assets [Line Items]	'	'	'
Weighted Average Amortization Period (in years)	'	'	'6 years 3 months 18 days
Gross	$18,500,000	'	$18,500,000
Accumulated Amortization	-5,280,000	'	-5,280,000
Intangible assets, net of amortization	13,220,000	'	13,220,000
Amortization of acquired intangible assets	700,000	700,000	'
Expected acquired intangible assets amortization expense, 2013	2,900,000	'	2,900,000
Expected acquired intangible assets amortization expense, 2014	2,900,000	'	2,900,000
Expected acquired intangible assets amortization expense, 2015	2,900,000	'	2,900,000
Expected acquired intangible assets amortization expense, 2016	2,900,000	'	2,900,000
Expected acquired intangible assets amortization expense, 2017	2,200,000	'	2,200,000
Expected acquired intangible assets amortization expense, 2018	1,500,000	'	1,500,000
Acquisition related charges	'	200,000	'
Developed technology	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Weighted Average Amortization Period (in years)	'	'	'7 years
Gross	10,700,000	'	10,700,000
Accumulated Amortization	-2,739,000	'	-2,739,000
Intangible assets, net of amortization	7,961,000	'	7,961,000
Customer relationships	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Weighted Average Amortization Period (in years)	'	'	'5 years 6 months
Gross	7,800,000	'	7,800,000
Accumulated Amortization	-2,541,000	'	-2,541,000
Intangible assets, net of amortization	$5,259,000	'	$5,259,000

Changes_in_Stockholders_Equity2

Changes in Stockholders' Equity and Accumulated Other Comprehensive Loss (Details) (USD $)

3 Months Ended

9 Months Ended

0 Months Ended

3 Months Ended

0 Months Ended

9 Months Ended

Share data in Millions, unless otherwise specified

Sep. 28, 2013

Sep. 29, 2012

Sep. 28, 2013

Sep. 29, 2012

Feb. 24, 2012

Mar. 30, 2013

Feb. 27, 2013

Sep. 28, 2013

Sep. 28, 2013

Sep. 28, 2013

Sep. 28, 2013

Sep. 28, 2013

Sep. 28, 2013

Share Repurchase Program approved on Feb 24, 2012

Share Repurchase Program approved on Feb 24, 2012

Share Repurchase Program approved on Feb 27, 2013

Share Repurchase Program approved on Feb 27, 2013

Common stock

Paid-in capital

Treasury stock

Accumulated deficit

Accumulated other comprehensive loss

Increase (Decrease) in Stockholders' Equity [Roll Forward]

'

'

'

'

'

'

'

'

'

'

'

'

'

Beginning balance

'

'

$357,550,000

'

'

'

'

'

$1,155,000

$621,170,000

$0

($264,514,000)

($261,000)

Net Income for the period

8,844,000

-2,175,000

15,774,000

-22,431,000

'

'

'

'

'

'

'

15,774,000

'

Unrealized loss related to marketable securities, net

'

'

-11,000

17,000

'

'

'

'

'

'

'

'

-11,000

Translation adjustments

225,000

-15,000

-205,000

244,000

'

'

'

'

'

'

'

'

-205,000

Common stock issued in connection with the exercise of stock options, ESPP and vested RSUs (net of taxes)

'

'

2,061,000

'

'

'

'

'

14,000

2,047,000

'

'

'

Stock repurchase

'

'

-2,452,000

'

'

'

'

'

'

'

-2,452,000

'

'

Retirement of treasury stock

'

'

0

'

'

'

'

'

-6,000

-2,446,000

2,452,000

'

'

Stock-based compensation expense related to stock options, ESPP and RSUs

'

'

6,985,000

'

'

'

'

'

'

6,985,000

'

'

'

Ending balance

379,702,000

'

379,702,000

'

'

'

'

'

1,163,000

627,756,000

0

-248,740,000

-477,000

Stock repurchase program, authorized amount

'

'

'

'

20,000,000

'

20,000,000

'

'

'

'

'

'

Shares repurchased (in shares)

'

'

'

'

'

0.6

'

0

'

'

'

'

'

Shares repurchased

'

'

'

'

'

$2,500,000

'

'

'

'

'

'

'

Income_Taxes_Details

Income Taxes (Details) (USD $)	3 Months Ended		9 Months Ended				9 Months Ended	12 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 28, 2013	Sep. 28, 2013	Dec. 29, 2012
					Lapse of the statute of limitations on foreign tax filings	Maximum	U.S. Federal	Foreign jurisdictions
						Lapse of the statute of limitations on foreign tax filings
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]	'	'	'	'	'	'	'	'
Provision for income taxes	$417,000	$1,916,000	$3,037,000	$20,297,000	'	'	'	'
Statutory income tax rate	'	'	'	'	'	'	35.00%	0.00%
Unrecognized tax benefits that could significantly change during the next twelve months	'	'	'	'	300,000	'	'	'
Unrecognized tax benefits, associated interest and penalties that could significantly change within the next twelve months	'	'	'	'	'	300,000	'	'
Total potential decrease in UTB	'	'	'	'	$600,000	'	'	'

Restructuring_Details

Restructuring (Details) (USD $)

3 Months Ended

9 Months Ended

3 Months Ended

In Thousands, unless otherwise specified

Sep. 28, 2013

Sep. 29, 2012

Sep. 28, 2013

Sep. 29, 2012

Sep. 28, 2013

Sep. 29, 2012

Sep. 28, 2013

Sep. 29, 2012

Sep. 28, 2013

Sep. 29, 2012

Jun. 29, 2013

Oct. 31, 2012

Severance and related

Severance and related

Lease termination

Lease termination

Other

Other

2012 restructuring plan

2012 restructuring plan

employee

Restructuring Cost and Reserve [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Approximate reduction in headcount

'

'

'

'

'

'

'

'

'

'

'

110

Recorded restructuring charges - less than

$85

$0

$257

$643

'

'

'

'

'

'

$100

'

Restructuring Reserve [Roll Forward]

'

'

'

'

'

'

'

'

'

'

'

'

Balance at beginning of the period

'

'

3,424

1,569

2,373

1,543

793

26

258

0

'

'

Restructuring charges

'

'

574

761

105

296

224

0

245

465

'

'

Cash payments

'

'

-3,103

-2,212

-2,312

-1,735

-571

-12

-220

-465

'

'

Adjustments to prior restructuring costs

'

'

-317

-118

-150

-104

-99

-14

-68

0

'

'

Balance at the end of the period

$578

$0

$578

$0

$16

$0

$347

$0

$215

$0

'

'

StockBased_Compensation_Detail

Stock-Based Compensation (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Total stock-based compensation	$2,562	$2,075	$6,985	$5,753
Cost of products sold	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Total stock-based compensation	171	139	460	388
Research and development	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Total stock-based compensation	1,058	834	2,871	2,273
Selling, general and administrative	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Total stock-based compensation	$1,333	$1,102	$3,654	$3,092

Segment_and_Geographic_Informa2

Segment and Geographic Information (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
			segment
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'
Number of reportable segments	'	'	1	'
Total revenue	$87,154	$70,889	$243,006	$213,381
Total revenue as percentage	100.00%	100.00%	100.00%	100.00%
Asia	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'
Total revenue	66,191	48,861	177,848	144,396
Total revenue as percentage	76.00%	69.00%	73.00%	68.00%
Europe	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'
Total revenue	11,857	12,424	36,665	37,736
Total revenue as percentage	14.00%	17.00%	15.00%	18.00%
Americas	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'
Total revenue	$9,106	$9,604	$28,493	$31,249
Total revenue as percentage	10.00%	14.00%	12.00%	14.00%