Sigma Designs (SIGM) 10-Q 10 Sep 14 2015 Q2 Quarterly report Financial data

Document_And_Entity_Informatio

Document And Entity Information	6 Months Ended
	Aug. 02, 2014	Sep. 08, 2014
Document and Entity Information [Abstract]	'	'
Entity Registrant Name	'SIGMA DESIGNS INC	'
Document Type	'10-Q	'
Current Fiscal Year End Date	'--01-31	'
Entity Common Stock, Shares Outstanding	'	34,855,632
Amendment Flag	'false	'
Entity Central Index Key	'0000790715	'
Entity Current Reporting Status	'Yes	'
Entity Voluntary Filers	'No	'
Entity Filer Category	'Accelerated Filer	'
Entity Well-known Seasoned Issuer	'No	'
Document Period End Date	2-Aug-14	'
Document Fiscal Year Focus	'2015	'
Document Fiscal Period Focus	'Q2	'

Unaudited_Condensed_Consolidat

Unaudited Condensed Consolidated Balance Sheets (USD $)	Aug. 02, 2014	Feb. 01, 2014
In Thousands, unless otherwise specified
Current assets	'	'
Cash and cash equivalents	$69,848	$64,326
Short-term marketable securities	5,828	7,791
Restricted cash	1,540	1,775
Accounts receivable, net of allowances of $287 as of August 2, 2014 and $300 as of February 1, 2014	24,792	27,647
Inventory	20,305	20,403
Deferred tax assets	4,194	4,144
Prepaid expenses and other current assets	6,700	8,069
Total current assets	133,207	134,155
Long-term marketable securities	6,346	15,505
Software, equipment and leasehold improvements, net	22,283	27,089
Intangible assets, net	26,067	29,780
Deferred tax assets, net of current portion	292	439
Long-term investments and notes receivable, net of current portion	3,271	3,873
Other non-current assets	4,852	4,934
Total assets	196,318	215,775
Current liabilities	'	'
Accounts payable	16,313	16,184
Accrued compensation and related benefits	6,236	6,288
Accrued liabilities	13,660	19,813
Total current liabilities	36,209	42,285
Income taxes payable	7,328	7,065
Long-term deferred tax liabilities	744	976
Other long-term liabilities	6,004	7,058
Total liabilities	50,285	57,384
Commitments and contingencies (Note 10)	'	'
Shareholders' equity	'	'
Preferred stock; no par value, authorized 2,000,000 shares, none issued and outstanding	0	0
Common stock and additional paid-in capital; no par value; 100,000,000 shares authorized; 39,487,768 issued and 34,828,625 outstanding as of August 2, 2014 and 39,083,961 issued and 34,424,818 outstanding as of February 1, 2014	490,550	485,188
Treasury stock, at cost, 4,659,143 shares as of August 2, 2014 and February 1, 2014	-88,198	-88,198
Accumulated other comprehensive income	465	651
Accumulated deficit	-256,784	-239,250
Total shareholders' equity	146,033	158,391
Total liabilities and shareholders' equity	$196,318	$215,775

Unaudited_Condensed_Consolidat1

Unaudited Condensed Consolidated Balance Sheets (Parentheticals) (USD $)	Aug. 02, 2014	Feb. 01, 2014
In Thousands, except Share data, unless otherwise specified
Accounts receivable, allowances (in Dollars)	$287	$300
Preferred stock, par value (in Dollars per share)	$0	$0
Preferred stock, shares authorized	2,000,000	2,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in Dollars per share)	$0	$0
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	39,487,768	39,083,961
Common stock, shares outstanding	34,828,625	34,424,818
Treasury stock, shares	4,659,143	4,659,143

Unaudited_Condensed_Consolidat2

Unaudited Condensed Consolidated Statements of Operations (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Aug. 02, 2014	Aug. 03, 2013	Aug. 02, 2014	Aug. 03, 2013
Net revenue	$42,810	$53,762	$79,683	$106,302
Cost of revenue	20,921	25,696	37,569	51,290
Gross profit	21,889	28,066	42,114	55,012
Operating expenses	'	'	'	'
Research and development	16,452	18,769	33,555	38,973
Sales and marketing	5,475	5,527	10,925	11,209
General and administrative	4,555	4,937	9,586	9,699
Restructuring costs	46	680	1,020	890
Impairment of IP, mask sets and design tools	1,156	'	1,266	188
Total operating expenses	27,684	29,913	56,352	60,959
Loss from operations	-5,795	-1,847	-14,238	-5,947
Gain on sale of development project	'	'	'	1,079
Interest and other income, net	372	121	320	812
Loss before income taxes	-5,423	-1,726	-13,918	-4,056
Provision for income taxes	2,197	3,065	3,616	5,268
Net loss	($7,620)	($4,791)	($17,534)	($9,324)
Net loss per common share:	'	'	'	'
Basic (in Dollars per share)	($0.22)	($0.14)	($0.51)	($0.27)
Diluted (in Dollars per share)	($0.22)	($0.14)	($0.51)	($0.27)
Shares used in computing net loss per share:	'	'	'	'
Basic (in Shares)	34,622	34,259	34,459	34,008
Diluted (in Shares)	34,622	34,259	34,459	34,008

Unaudited_Condensed_Consolidat3

Unaudited Condensed Consolidated Statements of Comprehensive Loss (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Aug. 02, 2014	Aug. 03, 2013	Aug. 02, 2014	Aug. 03, 2013
Net loss	($7,620)	($4,791)	($17,534)	($9,324)
Other comprehensive (loss) income:	'	'	'	'
Currency translation adjustments	-302	48	-94	-318
Unrealized loss on marketable securities, net of tax	-138	-153	-92	-196
Other comprehensive loss	-440	-105	-186	-514
Comprehensive loss	($8,060)	($4,896)	($17,720)	($9,838)

Unaudited_Condensed_Consolidat4

Unaudited Condensed Consolidated Statements of Cash Flows (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Aug. 02, 2014	Aug. 03, 2013
Cash flows from operating activities:	'	'
Net loss	($17,534)	($9,324)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:	'	'
Depreciation and amortization	10,706	10,272
Stock-based compensation	2,873	3,719
Provision for excess and obsolete inventory	1,268	575
(Release of) provision for sales returns, discounts and doubtful accounts	-13	62
Deferred income taxes	-29	2,913
Gain on sale of development project	'	-1,079
Impairment of IP, mask sets and design tools	1,266	188
Tax effect related to stock options	-620	'
Excess tax expense from stock- based compensation	620	'
Non-cash restructuring charges	'	830
Impairment of investment	601	'
Other non-cash activities	5	-6
Changes in operating assets and liabilities:	'	'
Accounts receivable	2,868	-17,448
Inventory	-1,170	4,325
Prepaid expenses and other current and non-current assets	1,134	2,331
Accounts payable	190	13,809
Accrued liabilities, compensation and related benefits	174	1,915
Income taxes payable	-3,823	-991
Other long-term liabilities	-2,425	-347
Net cash (used in) provided by operating activities	-3,909	11,744
Cash flows from investing activities:	'	'
Restricted cash	235	-2
Purchases of marketable securities	'	-7,874
Sales and maturities of marketable securities	11,030	7,641
Purchases of software, equipment and leasehold improvements	-3,012	-4,995
Proceeds from sale of development project, net of transaction fees	'	1,971
Repayment of note receivable	230	250
Purchases of IP	-1,553	-4,099
Net cash provided by (used in) investing activities	6,930	-7,108
Cash flows from financing activities:	'	'
Excess tax benefit from stock-based compensation	1,242	'
Net proceeds from exercises of employee stock options and stock purchase rights	1,247	1,447
Net cash provided by financing activities	2,489	1,447
Effect of foreign exchange rate changes on cash and cash equivalents	12	-160
Net increase in cash and cash equivalents	5,522	5,923
Cash and cash equivalents, beginning of period	64,326	51,218
Cash and cash equivalents, end of period	69,848	57,141
Supplemental disclosure of cash flow information:	'	'
Cash paid for income taxes	$4,777	$3,215

Note_1_Organization_and_Summar

Note 1 - Organization and Summary of Significant Accounting Policies	6 Months Ended
	Aug. 02, 2014
Disclosure Text Block [Abstract]	'
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	'
	1.             Organization and summary of significant accounting policies
	Organization and nature of operations:  Sigma Designs, Inc. (referred to collectively in these unaudited condensed consolidated financial statements as “Sigma,” “we,” “our”, “the Company” and “us”) is a leader in intelligent media platforms in home entertainment and control.  We focus on integrated system-on-chip, or SoC, solutions that serve as the foundation for some of the world’s leading consumer products, including televisions, set-top boxes and video networking products. All of our primary products are semiconductors that are targeted toward end-product manufacturers, Original Equipment Manufacturers, or OEMs, and Original Design Manufacturers, or ODMs. We sell our products into four primary markets which are the Digital Television, or DTV market, the home networking market, the set-top box market, and the home control market. We derive a portion of our revenue from licensing and other markets, including licenses, software development kits, engineering support services for hardware and software, engineering development for customization of chipsets and other accessories.
	Basis of presentation:  The unaudited condensed consolidated financial statements include the accounts of Sigma Designs, Inc. and its wholly-owned subsidiaries.  All significant intercompany balances and transactions have been eliminated upon consolidation. We operate and report quarterly financial results that consist of 13 weeks and end on the last Saturday of the period. The second quarter of fiscal 2015 and fiscal 2014 ended on August 2, 2014 (91 days) and August 3, 2013 (91 days), respectively.
	The unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“US GAAP”), for interim financial information and the rules and regulations of the Securities and Exchange Commission (“SEC”).  They do not include all disclosures required by US GAAP for complete financial statements. Therefore, these financial statements should be read in conjunction with our audited consolidated financial statements and notes thereto for the year ended February 1, 2014, included in our fiscal 2014 Annual Report on Form 10-K, as filed with the SEC on April 17, 2014, referred to as our fiscal 2014 Annual Report.
	The condensed consolidated financial statements included herein are unaudited; however, they contain all normal recurring accruals and adjustments that, in our opinion, are necessary to present fairly our consolidated financial position at August 2, 2014 and February 1, 2014, the consolidated results of our operations for the three and six months ended August 2, 2014 and August 3, 2013, and the consolidated cash flows for the six months ended August 2, 2014 and August 3, 2013.  The results of operations for the three and six months ended August 2, 2014 are not necessarily indicative of the results to be expected for future quarters or the full year.
	There have been no significant changes in our critical accounting policies during the six months ended August 2, 2014, as compared to the critical accounting policies described in our Annual Report on Form 10-K for the year ended February 1, 2014. For a complete summary of our significant accounting policies, refer to Note 1, "Organization and Summary of Significant Accounting Policies”, in Part II, Item 8 of our fiscal 2014 Annual Report.
	Recent accounting pronouncements
	In May 2014, the FASB issued Accounting Standard Update 2014-09, Revenue from Contracts with Customers (ASU 2014-09) providing a comprehensive new revenue recognition standard. ASU 2014-09 provides revised standards of recognition predicated on when an entity transfers promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU 2014-09 is effective for us in our first quarter of fiscal 2018. ASU 2014-09 can be applied retrospectively with a modified retrospective application permitted. We are currently evaluating the impact of our pending adoption of ASU 2014-09 on our consolidated financial statements.

Note_2_Cash_Cash_Equivalents_a

Note 2 - Cash, Cash Equivalents and Marketable Securities	6 Months Ended
	Aug. 02, 2014
Disclosure Text Block Supplement [Abstract]	'
Cash, Cash Equivalents, and Marketable Securities [Text Block]	'
	2.             Cash, cash equivalents and marketable securities
	As of August 2, 2014 and February 1, 2014, we had $1.5 million and $1.8 million, respectively, of restricted cash related to deposits pledged to a financial institution with regard to our foreign exchange hedging transactions and an office-space operating lease, which is not included in the amounts below. Cash, cash equivalents and marketable securities consist of the following (in thousands):
		2-Aug-14						1-Feb-14
		Book Value		Net Unrealized Gains (Losses)		Fair Value		Book Value		Net Unrealized Gains (Losses)		Fair Value
	Corporate bonds	$	10,644	$	224	$	10,868	$	21,186	$	308	$	21,494
	Money market funds		17,159		-		17,159		13,521		-		13,521
	Municipal bonds and notes		-		-		-		505		3		508
	Fixed income mutual funds		1,283		23		1,306		1,286		8		1,294
	Total cash equivalents and marketable securities	$	29,086	$	247	$	29,333	$	36,498	$	319	$	36,817
	Cash on hand held in the United States					$	3,912					$	1,104
	Cash on hand held overseas						48,777						49,701
	Total cash on hand						52,689						50,805
	Total cash, cash equivalents and marketable securities					$	82,022					$	87,622
	Reported as:
	Cash and cash equivalents					$	69,848					$	64,326
	Short-term marketable securities						5,828						7,791
	Long-term marketable securities						6,346						15,505
						$	82,022					$	87,622
	The amortized cost and estimated fair value of cash equivalents and marketable securities, by contractual maturity, are as follows (in thousands):
		2-Aug-14				1-Feb-14
		Book Value		Fair Value		Book Value		Fair Value
	Due in one year or less	$	22,964	$	22,987	$	21,284	$	21,312
	Due in greater than one year		6,122		6,346		15,214		15,505
	Total	$	29,086	$	29,333	$	36,498	$	36,817

Note_3_Fair_Values_of_Assets_a

Note 3 - Fair Values of Assets and Liabilities	6 Months Ended
	Aug. 02, 2014
Fair Value Disclosures [Abstract]	'
Fair Value Disclosures [Text Block]	'
	3.             Fair values of assets and liabilities
	Fair value is defined as, “the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (exit price).” The accounting standards establish a consistent framework for measuring fair value and disclosure requirements about fair value measurements and among other things, require us to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value.
	Fair value hierarchy
	The accounting standards discuss valuation techniques, such as the market approach (comparable market prices), the income approach (present value of future income or cash flow), and the cost approach (cost to replace the service capacity of an asset or replacement cost). The standards utilize a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value into three broad levels. The following is a brief description of those three levels:
		●	Level 1 - Valuation is based upon quoted prices for identical instruments traded in active markets.
		●	Level 2 - Valuation is based upon quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-based valuation techniques for which all significant assumptions are observable in the market.
		●	Level 3 - Valuation is generated from model-based techniques that use significant assumptions not observable in the market. These unobservable assumptions reflect our estimate of assumptions that market participants would use in pricing the asset or liability. Valuation techniques include use of option pricing models, discounted cash flow models, and similar techniques.
	Determination of fair value
	Our cash equivalents and marketable securities are classified within Level 1 of the fair value hierarchy because they are valued using quoted market prices, broker or dealer quotations or alternative pricing sources with reasonable levels of price transparency. The types of marketable securities valued based on quoted market prices in active markets include most U.S. government and agency securities, sovereign government obligations, money market securities and certain corporate obligations with high credit ratings and an ongoing trading market.
	Our foreign currency derivative instruments were classified as Level 2 because they are valued using quoted prices and other observable data of similar instruments in active markets.
	The tables below present the balances of our assets and liabilities measured at fair value on a recurring basis as of August 2, 2014 and February 1, 2014 (in thousands):
			2-Aug-14
			Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	Corporate bonds		$	10,868	$	10,868	$	-	$	-
	Money market funds			17,159		17,159		-		-
	Fixed income mutual funds			1,306		1,306		-		-
	Total cash equivalents and marketable securities			29,333		29,333		-		-
	Restricted cash			1,540		1,540		-		-
	Total assets measured at fair value		$	30,873	$	30,873	$	-	$	-
			1-Feb-14
			Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	Corporate bonds		$	21,494	$	21,494	$	-	$	-
	Money market funds			13,521		13,521		-		-
	Municipal bonds and notes			508		508		-		-
	Fixed income mutual funds			1,294		1,294		-		-
	Total cash equivalents and marketable securities			36,817		36,817		-		-
	Restricted cash			1,775		1,775		-		-
	Derivative instruments asset			35		-		35		-
	Total assets measured at fair value		$	38,627	$	38,592	$	35	$	-
	Assets measured and recorded at fair value on a non-recurring basis
	Our non-marketable preferred stock investments in privately-held venture capital funded technology companies are recorded at cost and are adjusted to fair value only in the event that they become other-than-temporarily impaired. As of August 2, 2014, we held equity investments in three privately-held venture capital funded technology companies and an equity investment in one joint venture, with an aggregate carrying value of $3.3 million. As of August 2, 2014, we did not identify any events or changes in circumstances that may have had a significant adverse effect on the fair value of these investments. Each of these equity investments in privately-held companies constituted less than a 20% ownership position. Furthermore, we do not believe that we have the ability to exert significant influence over any of these companies.

Note_4_Derivative_Financial_In

Note 4 - Derivative Financial Instruments	6 Months Ended
	Aug. 02, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Derivative Instruments and Hedging Activities Disclosure [Text Block]	'
	4.             Derivative financial instruments
	Foreign exchange contracts are recognized either as assets or as liabilities on the balance sheet at fair value at the end of each reporting period.
	We have used foreign currency derivatives such as forward and option contracts as hedges against certain anticipated transactions denominated in Israeli shekels, or NIS. We do not assess derivative contracts for hedge effectiveness and thus such contracts do not qualify for hedge accounting. Therefore, we recognize all gains and losses from changes in the fair value of these derivate contracts immediately into earnings. Changes in fair value of the derivatives are recorded as interest and other (expense) income.
	As of August 2, 2014, we had no foreign exchange contracts.  As of February 1, 2014, we had foreign exchange contracts to sell up to approximately $0.9 million for a total amount of approximately NIS 3.3 million, that matured on April 28, 2014. We did not recognize any gains or losses as a result of foreign exchange contracts for the three months ended August 2, 2014 and recognized losses of $0.1 million for the six months ended August 2, 2014; and for the three and six months ended August 3, 2013, we recognized losses of approximately $0.3 million and $0.2 million, respectively, in interest and other income, net as a result of foreign exchange contracts.
	The following table presents the fair value of our outstanding derivative instruments as of August 2, 2014 and February 1, 2014 (in thousands):
	Derivative Assets	Balance Sheet Location	August 2,		February 1,
			2014		2014
	Foreign exchange contracts not designated as cash flow hedges	Prepaid expenses and other current assets	$	-	$	35
	Total fair value of derivative instruments		$	-	$	35

Note_5_Investments_in_and_Note

Note 5 - Investments in and Notes Receivable from Privately Held Companies	6 Months Ended
	Aug. 02, 2014
Investment Holdings [Text Block] [Abstract]	'
Investment Holdings [Text Block]	'
	5.             Investments in and notes receivable from privately held companies
	The following table sets forth the value of investments in and notes receivable from privately-held companies (in thousands):
	Equity investments:	2-Aug-14		1-Feb-14
	Issuer A	$	2,000	$	2,000
	Issuer B		1,000		1,000
	Issuer C		129		730
	Issuer D		142		143
	Total equity investments		3,271		3,873
	Notes receivable:
	Issuer A		-		230
	Total notes receivable		-		230
	Total equity investments and notes receivable	$	3,271	$	4,103
	Equity investments
	During fiscal 2009, we purchased shares of preferred stock in a privately-held venture capital funded technology company (“Issuer A”) at a total investment cost of $1.0 million. In the fourth quarter of fiscal 2010, we purchased additional shares of preferred stock in Issuer A at a cost of $1.0 million. During the quarter ended August 2, 2014, the remaining balance of the note receivable from Issuer A was fully repaid.
	In the third quarter of fiscal 2011, we purchased shares of preferred stock in another privately-held technology company (“Issuer B”) at a total investment cost of $1.0 million.
	In the fourth quarter of fiscal 2011, we purchased shares of preferred stock in another privately-held technology company (“Issuer C”) at a total investment cost of $1.0 million. In the fourth quarter of fiscal 2014 and the second quarter of fiscal 2015, we recorded impairment charges of $0.3 million and $0.6 million, respectively, on this investment as we concluded the impairment to be other-than-temporary.
	In the third quarter of fiscal 2012, we made an equity investment of $0.1 million in a privately-held joint venture (“Issuer D”).
	We made the above-described investments because we viewed the issuer as either having strategic technology or a business that would complement our technological capabilities or help create an opportunity for us to sell our chipset solutions. We analyze each investment quarterly for evidence of impairment.
	Our President and Chief Executive Officer is a member of the Board of Directors of both our Issuer A and Issuer B investments. In the case of Issuer B, the investment transaction was negotiated without the personal involvement of the executive officer who had a personal interest in the transaction.

Note_6_Composition_of_Certain_

Note 6 - Composition of Certain Financial Statement Captions	6 Months Ended
	Aug. 02, 2014
Disclosure Text Block Supplement [Abstract]	'
Supplemental Balance Sheet Disclosures [Text Block]	'
	6.             Composition of certain financial statement captions
	The following tables summarize the main items comprising certain financial statement captions as of August 2, 2014 and February 1, 2014 (in thousands):
	Inventory	August 2,			February 1,
		2014			2014
	Wafers and other purchased materials	$	9,783		$	10,079
	Work-in-process		4,116			1,527
	Finished goods		6,406			8,797
	Total inventory	$	20,305		$	20,403
	Prepaid expenses and other current assets	August 2,			February 1,
		2014			2014
	Prepayments for inventory	$	1,680		$	1,670
	Note receivable		-			230
	Amounts due from seller related to DTV acquisition		-			1,439
	Other current assets		5,020			4,730
	Total prepaid expenses and other current assets	$	6,700		$	8,069
	Software, equipment and leasehold improvements	Estimated Useful Lives				2-Aug-14			1-Feb-14
		(years)
	Software		2			$	38,613		$	38,563
	Equipment	1	to	5			21,883			21,147
	Office equipment and furniture		2				8,831			8,806
	Leasehold improvements	1	to	6			3,150			3,149
	Total						72,477			71,665
	Less: Accumulated depreciation and amortization						(50,194	)		(44,576	)
	Total software, equipment and leasehold improvements, net					$	22,283		$	27,089
	Software, equipment and leasehold improvement depreciation and amortization expense for the three months ended August 2, 2014 and August 3, 2013 was $3.0 million and $2.1 million, respectively, and for the six months ended August 2, 2014 and August 3, 2013 was $6.1 million and $5.0 million, respectively.
	Accrued liabilities:	August 2,			February 1,
		2014			2014
	Income taxes payable, current portion	$	3,988		$	7,968
	Rebates		3,903			3,587
	License fees		2,174			1,929
	Warranties		640			620
	Royalties		629			985
	Deferred revenue		270			3,001
	Settlements		-			150
	Other accrued liabilities		2,056			1,573
	Total accrued liabilities	$	13,660		$	19,813

Note_7_Intangible_Assets

Note 7 - Intangible Assets	6 Months Ended
	Aug. 02, 2014
Disclosure Text Block [Abstract]	'
Intangible Assets Disclosure [Text Block]	'
	7.             Intangible assets
	The tables below present the balances of our intangible assets (in thousands, except for years):
		2-Aug-14
		Gross Value		Accumulated Impairment			Accumulated Amortization and Effect of Currency Translation			Net Value		Weighted Average Remaining Amortization Period (Years)
				Charges
	Acquired intangible assets:
	Developed technology	$	76,639	$	(24,614	)	$	(42,490	)	$	9,535		2.4
	Customer relationships		50,704		(30,486	)		(17,680	)		2,538		2.2
	Trademarks and other		4,078		-			(3,561	)		517		4.4
	Purchased IP - amortizing		22,998		(5,516	)		(13,249	)		4,233		1.3
	Total amortizing		154,419		(60,616	)		(76,980	)		16,823		2.2
	Purchased IP - not yet deployed		12,713		(3,469	)		-			9,244
	Total intangibles	$	167,132	$	(64,085	)	$	(76,980	)	$	26,067
		1-Feb-14
		Gross Value		Accumulated Impairment			Accumulated Amortization and Effect of Currency Translation			Net Value		Weighted Average Remaining Amortization Period (Years)
				Charges
	Acquired intangible assets:
	Developed technology	$	76,639	$	(24,614	)	$	(40,334	)	$	11,691		2.9
	Customer relationships		50,704		(30,486	)		(17,048	)		3,170		2.7
	Trademarks and other		4,078		-			(3,502	)		576		4.9
	Purchased IP - amortizing		21,569		(5,516	)		(11,464	)		4,589		1.5
	Total amortizing		152,990		(60,616	)		(72,348	)		20,026		2.6
	Purchased IP - not yet deployed		12,770		(3,016	)		-			9,754
	Total intangibles	$	165,760	$	(63,632	)	$	(72,348	)	$	29,780
	Acquired intangible assets represent intangible assets acquired through business combinations. Purchased intellectual property (“Purchased IP”) represents intangible assets acquired through direct purchases of licensed technology from vendors which is incorporated into our products.
	Purchased IP – not yet deployed relates to Purchased IP from third parties for our products that are currently in development. We begin amortizing such intellectual property upon the earlier of the beginning of the term of the license agreement, as appropriate, or at the time we begin shipment of the associated products into which such intellectual property is incorporated.
	The following table presents the amortization of intangible assets in the accompanying condensed consolidated statements of operations (in thousands):
		Three Months Ended					Six Months Ended
		August 2,		August 3,			August 2,			August 3,
		2014		2013			2014			2013
	Cost of sales	$	1,979	$	2,264		$	3,925		$	4,591
	Operating expenses		374		388			747			782
	Total intangibles amortization expense	$	2,353	$	2,652		$	4,672		$	5,373
	As of August 2, 2014, we expect amortization expense in future periods to be as follows (in thousands):
	Fiscal year	Total
	2015 (remaining six months)	$	4,672
	2016		7,289
	2017		4,122
	2018		636
	2019		104
	Total	$	16,823

Note_8_Restructuring_Costs

Note 8 - Restructuring Costs	6 Months Ended
	Aug. 02, 2014
Restructuring and Related Activities [Abstract]	'
Restructuring and Related Activities Disclosure [Text Block]	'
	8.          Restructuring costs
	In fiscal 2013, as a result of significant expansion in our infrastructure and operational activities in connection with purchases and acquisitions that took place between fiscal years 2008 and 2013, and in response to certain redundancies, underperforming operations and delays in programs and product releases, we implemented a restructuring program to realign our global operating expenses with our new business conditions, and to improve efficiency, competitiveness and profitability. Costs relating to facilities closure or lease commitment are recognized when the facility has been exited. Terminations costs are recognized when the costs are deemed both probable and estimable.
	In the first quarter of fiscal 2015, we incurred restructuring charges of $1.0 million, all of which was related to workforce reductions of 29 employees across several geographic regions, the majority of which were in our operations in Israel. Of the total restructuring charges recorded in the first fiscal quarter, approximately $0.1 million was reflected in cost of revenue and $0.9 million was reflected in operating expenses. During the second quarter of fiscal 2015, we incurred less than $0.1 million of restructuring charges.
	In the first quarter of fiscal 2014, we incurred restructuring charges of $0.3 million, all of which was related to workforce reductions of 17 employees across several geographic regions. During the second quarter of fiscal 2014, we incurred net restructuring charges of approximately $0.5 million related to a contingent liability under our lease obligation in Canada and $0.2 million in severance-related charges that resulted from a workforce reduction of eight employees. The aforementioned charges were substantially all reflected in operating expenses for their respective periods.
	Expenses recognized for restructuring activities impacting our operating expenses are included in “Restructuring costs” in the condensed consolidated statements of operations. Our restructuring measures could negatively impact our revenue and results of operations in the future as a result of less employees developing future products and working to sell existing products.
	A combined summary of the recent activity of the restructuring plans initiated by us is as follows (in thousands):
		Workforce			Facility Exit			Total			Cumulative
		Reduction			Costs						Restructuring
											Costs
	Liability, February 2, 2013	$	1,014		$	8		$	1,022		$	3,264
	Charges in fiscal 2014		1,696			610			2,306			2,306
	Cash payments		(2,347	)		(616	)		(2,963	)		-
	Liability, February 1, 2014		363			2			365			5,570
	Charges for the three months ended May 3, 2014		1,025			-			1,025			1,025
	Cash payments		(802	)		(2	)		(804	)		-
	Liability, May 3, 2014		586			-			586			6,595
	Charges for the three months ended August 2, 2014		46			-			46			46
	Cash payments		(386	)		-			(386	)		-
	Liability, August 2, 2014	$	246		$	-		$	246		$	6,641

Note_9_Sale_of_Development_Pro

Note 9 - Sale of Development Project	6 Months Ended
	Aug. 02, 2014
Disclosure Text Block Supplement [Abstract]	'
Mergers, Acquisitions and Dispositions Disclosures [Text Block]	'
	9.          Sale of development project
	On March 8, 2013, we entered into an Asset Purchase Agreement with a third party (the “Buyer”) to sell certain development projects (intellectual property) and long-lived assets (the “Connectivity Assets”) related to the connectivity technology over coaxial cable market, including the transfer of 21 employees (the “Connectivity Employees”) to the Buyer. The aggregate carrying amount of the Connectivity Assets ultimately transferred was approximately $0.6 million and were classified as assets held for sale in prepaid expenses and other current assets in the condensed consolidated balance sheet at February 2, 2013. We received an initial payment of $2.0 million in cash at the closing of the transaction and a payroll expense reimbursement payment of $0.6 million (as described more fully below). Under the terms of the Asset Purchase Agreement, if certain technical milestones were met by September 30, 2013 as a result of further development of the transferred technology by the Buyer, we were to be paid an additional $5.0 million in cash.
	In April 2013, upon receiving the closing consideration of $2.0 million, we recorded a gain of $1.1 million, net of the carrying value of the Connectivity Assets and fees for legal and bank services of approximately $0.4 million. The gain is included in “Gain on sale of development project” in the accompanying condensed consolidated statements of operations for the six months ended August 3, 2013. Additionally, in April 2013, in connection with the Asset Purchase Agreement, the Buyer reimbursed us for payroll expenses related to the employees transferred to the Buyer for the period from February 1, 2013 through the actual payroll transfer, totaling $0.6 million.
	As the contingent consideration was uncertain at the time of the initial sale, we did not recognize the contingent payment. Accordingly, payment consideration, if and when it is determined that the milestone was met, will be recorded as other income in our consolidated statements of operations in its entirety. The technical milestones were due by September 30, 2013.
	The Buyer advised us that it does not believe the milestones had been met by September 30, 2013. We are currently pursuing our rights through the dispute resolution provisions set forth in the Asset Purchase Agreement. To the extent we recognize any payment in regard to the milestone completion, we will recognize income upon receipt of any such proceeds from the Buyer. On September 5, 2014, the Buyer filed counterclaims in response to our claims arising from the Asset Purchase Agreement. We intend to contest these counterclaims vigorously and believe they are without merit.

Note_10_Commitments_and_Contin

Note 10 - Commitments and Contingencies	6 Months Ended
	Aug. 02, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingencies Disclosure [Text Block]	'
	10.          Commitments and contingencies
	Commitments
	Product warranty
	In general, we sell products with up to a one-year limited warranty that our products will be free from defects in materials and workmanship.  Warranty cost is estimated at the time revenue is recognized based on historical activity, and additionally, for any specific known product warranty issues.  Accrued warranty cost includes hardware repair and/or replacement and is included in accrued liabilities on the accompanying condensed consolidated balance sheets.
	Details of the change in accrued warranty as of August 2, 2014 and August 3, 2013 are as follows (in thousands):
	Three Months Ended	Balance		Additions and Adjustments		Deductions			Balance End
		Beginning of							of Period
		Period
	2-Aug-14	$	630	$	117	$	(107	)	$	640
	3-Aug-13	$	1,050	$	192	$	(202	)	$	1,040
	Six Months Ended	Balance		Additions and Adjustments		Deductions			Balance End
		Beginning of							of Period
		Period
	2-Aug-14	$	620	$	241	$	(221	)	$	640
	3-Aug-13	$	1,447	$	38	$	(445	)	$	1,040
	Purchase commitments
	We place non-cancelable orders to purchase semiconductor products from our suppliers on an eight to twelve week lead-time basis.  As of August 2, 2014, the total amount of outstanding non-cancelable purchase orders was approximately $39.3 million.
	Design Tools
	We entered into an agreement with a vendor to purchase $12.9 million of design tools. Payments under this agreement are being made on a quarterly basis from June 2013 through March 2016. As of August 2, 2014, remaining payments under this agreement totaled $9.5 million. We have fully accrued this amount as of August 2, 2014.
	Indemnifications
	In certain limited circumstances, we have agreed and may agree in the future to indemnify certain customers against patent infringement claims from third parties related to our intellectual property. In these limited circumstances, the terms and conditions of sale generally limit the scope of the available remedies to a variety of industry-standard methods including, but not limited to, a right to control the defense or settlement of any claim, procure the right for continued usage, and a right to replace or modify the infringing products to make them non-infringing. To date, we have not incurred or accrued any significant costs related to any claims under such indemnification provisions.
	Our articles of incorporation and bylaws require that we indemnify our officers and directors against expenses, judgments, fines, settlements and other amounts actually and reasonably incurred in connection with any proceedings arising out of their services to us. In addition, we have entered into separate indemnification agreements with each of our directors and executive officers, which provide for indemnification of these individuals under similar circumstances and under additional circumstances. The indemnification obligations are more fully described in our charter documents and the form of indemnification agreement filed with our SEC reports. We purchase insurance to cover claims or a portion of the claims made against our directors and officers. Since a maximum obligation is not explicitly stated in our charter documents or in our indemnification agreements and will depend on the facts and circumstances that arise out of any future claims, the overall maximum amount of the obligations cannot be reasonably estimated. The fair value of these obligations was zero on our consolidated balance sheet as of August 2, 2014.
	Royalties
	We pay royalties for the right to sell certain products under various license agreements. During the three and six months ended August 2, 2014, we recorded gross royalty expense of $0.5 million and $1.1 million, respectively, and $0.6 million and $1.1 million for the three and six months ended August 3, 2013, respectively, in cost of revenue in the condensed consolidated statements of operations.
	Our wholly owned subsidiary, Sigma Designs Israel SDI Ltd. (formerly Coppergate Communications, Ltd.), participated in programs sponsored by the Office of the Chief Scientist of Israel's Ministry of Industry, Trade and Labor, or the OCS, for the support of research and development activities that we conducted in Israel. Through August 2, 2014, we had obtained grants from the OCS aggregating to $5.2 million of our research and development projects in Israel. We completed the most recent of these projects in 2013. We are obligated to pay royalties to the OCS, amounting up to 4.5% of the sales of certain products up to an amount equal to the grants received, plus LIBOR-based interest. As of August 2, 2014, our remaining potential obligation under these programs was approximately $1.1 million.
	Contingencies
	Litigation
	From time to time, we are involved in claims and legal proceedings that arise in the ordinary course of business. We expect that the number and significance of these matters will increase as our business expands. In particular, we could face an increasing number of patent and other intellectual property claims as the number of products and competitors in our industry grows. Any claims or proceedings against us, whether meritorious or not, could be time consuming, result in costly litigation, require significant amounts of management time, result in the diversion of significant operational resources or cause us to enter into royalty or licensing agreements which, if required, may not be available on terms favorable to us. If an unfavorable outcome were to occur against us, there exists the possibility of a material adverse impact on our financial position and results of operations for the period in which the unfavorable outcome occurs and, potentially, in future periods.
	In March 2013, we filed a motion to intervene in (and become a party to) U.S. Ethernet Innovations, LLC (USEI) v. AT&T Mobility, LLC (“AT&T”) and others, Case No. 5-10-cv-05254 CW, currently pending in the U.S. District Court for the Northern District of California, or the Litigation. In this Litigation, USEI filed a patent infringement complaint alleging that various AT&T products infringe USEI patents that have now expired, including alleging that set-top boxes deployed by AT&T that contain our SoCs infringe a USEI patent. USEI has made similar allegations that other defendants infringe this and other now expired USEI patents in this Litigation and other related cases. Further, other interveners have already been added to this Litigation and other related cases. USEI seeks monetary damages, attorney’s fees, and an injunction against AT&T, other defendants and other interveners. AT&T, other defendants and other interveners have denied the allegations of infringement made by USEI and asserted that USEI’s patents are invalid, unenforceable, and not infringed. The Court granted our motion to intervene. As a result, we filed a declaratory judgment complaint. USEI answered this complaint and asserted counter-claims against us, for which we have responded. The parties have now completed fact discovery and have moved on to expert discovery. USEI attempted to expand the scope of claims to cover all of our semiconductors; however, the court approved our motion to limit the case to only those devices initially claimed in the original USEI filing. Case management hearings for this multi-party suit have resulted in the court entertaining separate sequential trials for the various interveners remaining in the case. Intel Corporation, as one intervener, has requested that it proceed first, which would set a precedent for all subsequent trials. The trial date currently set by the court for the first trial is January 5, 2015.
	In February 2014, Mentor Graphics Corporation (“Mentor”) filed a complaint against us, Case No. 3-14-cv00742, in the U.S. District Court for the Northern District of California, for unspecified damages alleging copyright infringement, breach of contract, unjust enrichment, and a request for audit and accounting relating to a certain Reference Platform License Agreement for Embedded Software, dated March 28, 2008 (the “Mentor Agreement”) by and between Trident Microsystems, Inc. (“Trident”) and Mentor. The Mentor Agreement was assigned to us in connection with our acquisition of assets related to the DTV business of Trident. We have filed our answer to this complaint, denying the substantive allegations. No trial date has been set.
	Third-party licensed technology
	We license technologies from various third parties and incorporate that technology into our products. Some of these licenses require us to pay royalties and others require us to report sales activities so that royalties may be collected from our customers. From time to time, we are audited by licensors of these technologies for compliance with the terms of these licenses. In the third quarter of fiscal 2013, we settled an audit for $0.3 million payable in four quarterly equal installments commencing in September 2012. Concurrently, we negotiated a license agreement for this technology for a period of three years for an amount of $3.5 million, also payable in four quarterly equal installments commencing in September 2012. The full amount of the license fees was recorded as purchased IP in fiscal 2013 and will be amortized over the license term. On February 28, 2013, we received a letter from another technology licensor notifying us of their intent to audit our compliance with the terms of a license agreement that we use in our set-top box business. In the first quarter of 2015, we resolved this audit through binding arbitration for $0.2 million in penalties, $0.1 million of which was included in the condensed consolidated statement of operations for the six months ended August 2, 2014.
	We could be required to make additional payments as a result of pending or future compliance audits. For license agreements where we have royalty obligations, we charge any settlement payments that we make in connection with audits to cost of revenue. For license agreements where we simply have reporting obligations, we treat any settlement payments as penalties and charge the amounts to operating expenses in sales and marketing. During the quarter ended August 2, 2014, we have been notified by one of our licensors of their intent to audit for compliance with the terms of the license, for which the audit process has yet to commence. As of August 2, 2014, we believe we are in compliance with this and our other license agreements.

Note_11_Net_Loss_Per_Share

Note 11 - Net Loss Per Share	6 Months Ended
	Aug. 02, 2014
Earnings Per Share [Abstract]	'
Earnings Per Share [Text Block]	'
	11.           Net loss per share
	Basic and diluted net loss per share is computed by dividing net loss by the weighted average number of common shares outstanding. The following table sets forth the excluded anti-dilutive and excluded potentially dilutive securities for the three and six months ended August 2, 2014 and August 3, 2013 (in thousands):
		Three Months Ended				Six Months Ended
		August 2,		August 3,		August 2,		August 3,
		2014		2013		2014		2013
	Stock options excluded because exercise price is in excess of average stock price		3,904		4,513		3,956		4,677
	Stock options excluded because the effect of including would be anti-dilutive		7		18		8		21
	Restricted stock awards and units excluded because potential buyback shares exceed weighted average restricted stock units and awards outstanding		375		457		316		501
	Restricted stock awards and units excluded because the effect of including would be anti-dilutive		47		32		50		29

Note_12_Shareholders_Equity_an

Note 12 - Shareholders' Equity and Employee Benefits	6 Months Ended
	Aug. 02, 2014
Shareholders Equity And Employee Benefits Disclosure [Text Block] [Abstract]	'
Shareholders Equity And Employee Benefits Disclosure [Text Block]	'
	12.           Shareholders’ equity and employee benefits
	Condensed consolidated statement of shareholders’ equity (amounts in thousands, except shares)
		Common Stock					Treasury Stock						Accumulated Other
													Comprehensive Income
		Shares			Amount		Shares			Amount			Unrealized Gain (Loss)			Accumulated Translation Adjustment			Retained Earnings (Accumulated Deficit)			Total Shareholders’ Equity
	Balance, February 1, 2014		39,083,961		$	485,188		(4,659,143	)	$	(88,198	)	$	149		$	502		$	(239,250	)	$	158,391
	Unrealized loss on marketable securities		-			-		-			-			(92	)		-			-			(92	)
	Currency translation adjustments		-			-		-			-			-			(94	)		-			(94	)
	Stock-based compensation expense		-			2,873		-			-			-			-			-			2,873
	Tax effect related to stock options		(12,680	)		1,242		-			-			-			-			-			1,242
	Net proceeds from common stock issued under share plans		416,487			1,247		-			-			-			-			-			1,247
	Net loss		-			-		-			-			-			-			(17,534	)		(17,534	)
	Balance, August 2, 2014		39,487,768		$	490,550		(4,659,143	)	$	(88,198	)	$	57		$	408		$	(256,784	)	$	146,033
	Endowment insurance pension plan
	Related to our acquisition of our DTV business in May 2012, we added operations in Shanghai, China. It is required by the “Procedures of Shanghai Municipality on Endowment Insurance for Town Employees” to provide pension insurance for Shanghai employees. The plan is managed by the local authority and it is a mandatory plan. Under the current plan, the employee will contribute 8.0% of the annual base to the plan and the employer will match 21% of the annual base. For the three and six months ended August 2, 2014, we made matching contributions of $0.5 million and $1.0 million, respectively, and $0.4 million and $1.1 million for the three and six months ended August 3, 2013, respectively.
	Retirement pension plans
	We maintain retirement pension plans for the benefit of qualified employees in Denmark, Taiwan, the Netherlands, and Germany. For the three and six months ended August 2, 2014, we made matching contributions of $0.2 million and $0.5 million, respectively, and $0.2 million and $0.5 million for the three and six months ended August 3, 2013, respectively.
	Severance plan
	We maintain a severance plan for several Israeli employees pursuant to Israel's Severance Pay Law based on the most recent salary of the employees multiplied by the number of years of employment. Upon termination of employment, employees are entitled to one month salary for each year of employment or portion thereof. As of August 2, 2014, we have an accrued severance liability of $1.4 million offset by $1.3 million of severance employee funds.

Note_13_Income_taxes

Note 13 - Income taxes	6 Months Ended
	Aug. 02, 2014
Income Tax Disclosure [Abstract]	'
Income Tax Disclosure [Text Block]	'
	13.           Income taxes
	We recorded a provision for income taxes of $2.2 million and $3.1 million for the three months ended August 2, 2014 and August 3, 2013, respectively.  The provision for income taxes was $3.6 million and $5.3 million for the six months ended August 2, 2014 and August 3, 2013, respectively. The decrease in tax expense is primarily attributable to lower profitability in taxable jurisdictions in the first and second quarters of fiscal year 2015 as compared to the same periods in fiscal year 2014. During the three and six months ended August 2, 2014 and August 3, 2013, we were unable to reasonably project our annual effective tax rate, and therefore computed our provision for income taxes based on year-to-date actual financial results. Included in our provision for income taxes are foreign exchange gains or losses on unsettled income tax liabilities.

Note_14_Segment_and_Geographic

Note 14 - Segment and Geographical Information	6 Months Ended
	Aug. 02, 2014
Segment Reporting [Abstract]	'
Segment Reporting Disclosure [Text Block]	'
	14.           Segment and geographical information
	Operating segments are defined as components of an enterprise for which separate financial information is available and evaluated regularly by the chief operating decision-maker in deciding how to allocate resources and in assessing performance.  We are organized as, and operate in, one reportable segment.  Our operating segment consists of our geographically based entities in the United States, Israel, and Singapore.  Our chief operating decision-maker reviews consolidated financial information, accompanied by information about revenue by product group, target market, and geographic region.  We do not assess the performance of our geographic regions on other measures of income, expense or net income.
	We sell our products into four primary target markets, which are the DTV market, home networking market, set-top box market, and home control market. We also have license revenue, included in the license and other market, which we receive from the license of our technology to third parties.
	The following tables set forth net revenue and gross profit attributable to each target market (in thousands):
	Three Months Ended	DTV			Home networking			Set-top box			Home control			License and other		Total
	2-Aug-14
	Revenue from external customers	$	10,033		$	17,827		$	5,528		$	6,576		$	2,846	$	42,810
	Gross profit	$	3,652		$	10,105		$	2,406		$	3,275		$	2,451	$	21,889
	3-Aug-13
	Revenue from external customers	$	14,438		$	19,557		$	11,480		$	5,849		$	2,438	$	53,762
	Gross profit	$	5,364		$	11,107		$	6,265		$	3,059		$	2,271	$	28,066
	Six Months Ended	DTV			Home networking			Set-top box			Home control			License and other		Total
	2-Aug-14
	Revenue from external customers	$	16,097		$	33,946		$	11,217		$	12,716		$	5,707	$	79,683
	Gross profit	$	6,523		$	19,027		$	5,121		$	6,498		$	4,945	$	42,114
	3-Aug-13
	Revenue from external customers	$	30,280		$	39,737		$	20,795		$	10,438		$	5,052	$	106,302
	Gross profit	$	11,357		$	23,348		$	10,518		$	4,991		$	4,798	$	55,012
	A reconciliation of target market gross profit to consolidated loss before income taxes is as follows (in thousands):
		Three Months Ended						Six Months Ended
		August 2,			August 3,			August 2,			August 3,
		2014			2013			2014			2013
	Total gross profit from target markets	$	21,889		$	28,066		$	42,114		$	55,012
	Operating expenses		27,684			29,913			56,352			60,959
	Gain on sale of development project		-			-			-			1,079
	Interest and other income, net		372			121			320			812
	Loss before income taxes	$	(5,423	)	$	(1,726	)	$	(13,918	)	$	(4,056	)
	The following table sets forth net revenue for each geographic region based on the ship-to location of customers (in thousands):
		Three Months Ended						Six Months Ended
		August 2,			August 3,			August 2,			August 3,
		2014			2013			2014			2013
	Asia	$	34,073		$	40,426		$	63,318		$	78,466
	North America		5,209			5,630			9,546			10,660
	Europe		2,060			5,978			4,362			13,968
	Other Regions		1,468			1,728			2,457			3,208
	Net Revenue	$	42,810		$	53,762		$	79,683		$	106,302
	During the three and six months ended August 2, 2014, Benchmark Electronics accounted for 14% and 13% of our net revenue, respectively. During the three and six months ended August 3, 2013, Flextronics accounted for 10% and 12% of our net revenue, respectively.
	As of August 2, 2014, Benchmark Electronics and Nanning Fugui Precision accounted for approximately 14% and 10% of net accounts receivable, respectively. As of February 1, 2014, four customers accounted for approximately 15%, 12%, 11% and 10% of net accounts receivable, respectively.

Accounting_Policies_by_Policy_

Accounting Policies, by Policy (Policies)	6 Months Ended
	Aug. 02, 2014
Accounting Policies [Abstract]	'
Basis of Accounting, Policy [Policy Text Block]	'
	Basis of presentation:  The unaudited condensed consolidated financial statements include the accounts of Sigma Designs, Inc. and its wholly-owned subsidiaries.  All significant intercompany balances and transactions have been eliminated upon consolidation. We operate and report quarterly financial results that consist of 13 weeks and end on the last Saturday of the period. The second quarter of fiscal 2015 and fiscal 2014 ended on August 2, 2014 (91 days) and August 3, 2013 (91 days), respectively.
	The unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“US GAAP”), for interim financial information and the rules and regulations of the Securities and Exchange Commission (“SEC”).  They do not include all disclosures required by US GAAP for complete financial statements. Therefore, these financial statements should be read in conjunction with our audited consolidated financial statements and notes thereto for the year ended February 1, 2014, included in our fiscal 2014 Annual Report on Form 10-K, as filed with the SEC on April 17, 2014, referred to as our fiscal 2014 Annual Report.
	The condensed consolidated financial statements included herein are unaudited; however, they contain all normal recurring accruals and adjustments that, in our opinion, are necessary to present fairly our consolidated financial position at August 2, 2014 and February 1, 2014, the consolidated results of our operations for the three and six months ended August 2, 2014 and August 3, 2013, and the consolidated cash flows for the six months ended August 2, 2014 and August 3, 2013.  The results of operations for the three and six months ended August 2, 2014 are not necessarily indicative of the results to be expected for future quarters or the full year.
	There have been no significant changes in our critical accounting policies during the six months ended August 2, 2014, as compared to the critical accounting policies described in our Annual Report on Form 10-K for the year ended February 1, 2014. For a complete summary of our significant accounting policies, refer to Note 1, "Organization and Summary of Significant Accounting Policies”, in Part II, Item 8 of our fiscal 2014 Annual Report.
New Accounting Pronouncements, Policy [Policy Text Block]	'
	Recent accounting pronouncements
	In May 2014, the FASB issued Accounting Standard Update 2014-09, Revenue from Contracts with Customers (ASU 2014-09) providing a comprehensive new revenue recognition standard. ASU 2014-09 provides revised standards of recognition predicated on when an entity transfers promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU 2014-09 is effective for us in our first quarter of fiscal 2018. ASU 2014-09 can be applied retrospectively with a modified retrospective application permitted. We are currently evaluating the impact of our pending adoption of ASU 2014-09 on our consolidated financial statements.

Note_2_Cash_Cash_Equivalents_a1

Note 2 - Cash, Cash Equivalents and Marketable Securities (Tables)	6 Months Ended
	Aug. 02, 2014
Disclosure Text Block Supplement [Abstract]	'
Cash, Cash Equivalents and Investments [Table Text Block]	'
		2-Aug-14						1-Feb-14
		Book Value		Net Unrealized Gains (Losses)		Fair Value		Book Value		Net Unrealized Gains (Losses)		Fair Value
	Corporate bonds	$	10,644	$	224	$	10,868	$	21,186	$	308	$	21,494
	Money market funds		17,159		-		17,159		13,521		-		13,521
	Municipal bonds and notes		-		-		-		505		3		508
	Fixed income mutual funds		1,283		23		1,306		1,286		8		1,294
	Total cash equivalents and marketable securities	$	29,086	$	247	$	29,333	$	36,498	$	319	$	36,817
	Cash on hand held in the United States					$	3,912					$	1,104
	Cash on hand held overseas						48,777						49,701
	Total cash on hand						52,689						50,805
	Total cash, cash equivalents and marketable securities					$	82,022					$	87,622
	Reported as:
	Cash and cash equivalents					$	69,848					$	64,326
	Short-term marketable securities						5,828						7,791
	Long-term marketable securities						6,346						15,505
						$	82,022					$	87,622
Investments Classified by Contractual Maturity Date [Table Text Block]	'
		2-Aug-14				1-Feb-14
		Book Value		Fair Value		Book Value		Fair Value
	Due in one year or less	$	22,964	$	22,987	$	21,284	$	21,312
	Due in greater than one year		6,122		6,346		15,214		15,505
	Total	$	29,086	$	29,333	$	36,498	$	36,817

Note_3_Fair_Values_of_Assets_a1

Note 3 - Fair Values of Assets and Liabilities (Tables)	6 Months Ended
	Aug. 02, 2014
Fair Value Disclosures [Abstract]	'
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	'
		2-Aug-14
		Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	Corporate bonds	$	10,868	$	10,868	$	-	$	-
	Money market funds		17,159		17,159		-		-
	Fixed income mutual funds		1,306		1,306		-		-
	Total cash equivalents and marketable securities		29,333		29,333		-		-
	Restricted cash		1,540		1,540		-		-
	Total assets measured at fair value	$	30,873	$	30,873	$	-	$	-
		1-Feb-14
		Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	Corporate bonds	$	21,494	$	21,494	$	-	$	-
	Money market funds		13,521		13,521		-		-
	Municipal bonds and notes		508		508		-		-
	Fixed income mutual funds		1,294		1,294		-		-
	Total cash equivalents and marketable securities		36,817		36,817		-		-
	Restricted cash		1,775		1,775		-		-
	Derivative instruments asset		35		-		35		-
	Total assets measured at fair value	$	38,627	$	38,592	$	35	$	-

Note_4_Derivative_Financial_In1

Note 4 - Derivative Financial Instruments (Tables)	6 Months Ended
	Aug. 02, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]	'
	Derivative Assets	Balance Sheet Location	August 2,		February 1,
			2014		2014
	Foreign exchange contracts not designated as cash flow hedges	Prepaid expenses and other current assets	$	-	$	35
	Total fair value of derivative instruments		$	-	$	35

Note_5_Investments_in_and_Note1

Note 5 - Investments in and Notes Receivable from Privately Held Companies (Tables)	6 Months Ended
	Aug. 02, 2014
Investment Holdings [Text Block] [Abstract]	'
Schedule Of Equity Investments In And Financing Notes Receivable From Privately Held Companies [Table Text Block]	'
	Equity investments:	2-Aug-14		1-Feb-14
	Issuer A	$	2,000	$	2,000
	Issuer B		1,000		1,000
	Issuer C		129		730
	Issuer D		142		143
	Total equity investments		3,271		3,873
	Notes receivable:
	Issuer A		-		230
	Total notes receivable		-		230
	Total equity investments and notes receivable	$	3,271	$	4,103

Note_6_Composition_of_Certain_1

Note 6 - Composition of Certain Financial Statement Captions (Tables)	6 Months Ended
	Aug. 02, 2014
Disclosure Text Block Supplement [Abstract]	'
Schedule of Inventory, Current [Table Text Block]	'
	Inventory	August 2,			February 1,
		2014			2014
	Wafers and other purchased materials	$	9,783		$	10,079
	Work-in-process		4,116			1,527
	Finished goods		6,406			8,797
	Total inventory	$	20,305		$	20,403
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]	'
	Prepaid expenses and other current assets	August 2,			February 1,
		2014			2014
	Prepayments for inventory	$	1,680		$	1,670
	Note receivable		-			230
	Amounts due from seller related to DTV acquisition		-			1,439
	Other current assets		5,020			4,730
	Total prepaid expenses and other current assets	$	6,700		$	8,069
Property, Plant and Equipment [Table Text Block]	'
	Software, equipment and leasehold improvements	Estimated Useful Lives				2-Aug-14			1-Feb-14
		(years)
	Software		2			$	38,613		$	38,563
	Equipment	1	to	5			21,883			21,147
	Office equipment and furniture		2				8,831			8,806
	Leasehold improvements	1	to	6			3,150			3,149
	Total						72,477			71,665
	Less: Accumulated depreciation and amortization						(50,194	)		(44,576	)
	Total software, equipment and leasehold improvements, net					$	22,283		$	27,089
Schedule of Accrued Liabilities [Table Text Block]	'
	Accrued liabilities:	August 2,			February 1,
		2014			2014
	Income taxes payable, current portion	$	3,988		$	7,968
	Rebates		3,903			3,587
	License fees		2,174			1,929
	Warranties		640			620
	Royalties		629			985
	Deferred revenue		270			3,001
	Settlements		-			150
	Other accrued liabilities		2,056			1,573
	Total accrued liabilities	$	13,660		$	19,813

Note_7_Intangible_Assets_Table

Note 7 - Intangible Assets (Tables)	6 Months Ended
	Aug. 02, 2014
Disclosure Text Block [Abstract]	'
Schedule of Acquired Finite-Lived Intangible Assets by Major Class [Table Text Block]	'
		2-Aug-14
		Gross Value		Accumulated Impairment			Accumulated Amortization and Effect of Currency Translation			Net Value		Weighted Average Remaining Amortization Period (Years)
				Charges
	Acquired intangible assets:
	Developed technology	$	76,639	$	(24,614	)	$	(42,490	)	$	9,535		2.4
	Customer relationships		50,704		(30,486	)		(17,680	)		2,538		2.2
	Trademarks and other		4,078		-			(3,561	)		517		4.4
	Purchased IP - amortizing		22,998		(5,516	)		(13,249	)		4,233		1.3
	Total amortizing		154,419		(60,616	)		(76,980	)		16,823		2.2
	Purchased IP - not yet deployed		12,713		(3,469	)		-			9,244
	Total intangibles	$	167,132	$	(64,085	)	$	(76,980	)	$	26,067
		1-Feb-14
		Gross Value		Accumulated Impairment			Accumulated Amortization and Effect of Currency Translation			Net Value		Weighted Average Remaining Amortization Period (Years)
				Charges
	Acquired intangible assets:
	Developed technology	$	76,639	$	(24,614	)	$	(40,334	)	$	11,691		2.9
	Customer relationships		50,704		(30,486	)		(17,048	)		3,170		2.7
	Trademarks and other		4,078		-			(3,502	)		576		4.9
	Purchased IP - amortizing		21,569		(5,516	)		(11,464	)		4,589		1.5
	Total amortizing		152,990		(60,616	)		(72,348	)		20,026		2.6
	Purchased IP - not yet deployed		12,770		(3,016	)		-			9,754
	Total intangibles	$	165,760	$	(63,632	)	$	(72,348	)	$	29,780
Amortization Expense of Intangible Assets [Table Text Block]	'
		Three Months Ended					Six Months Ended
		August 2,		August 3,			August 2,			August 3,
		2014		2013			2014			2013
	Cost of sales	$	1,979	$	2,264		$	3,925		$	4,591
	Operating expenses		374		388			747			782
	Total intangibles amortization expense	$	2,353	$	2,652		$	4,672		$	5,373
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	'
	Fiscal year	Total
	2015 (remaining six months)	$	4,672
	2016		7,289
	2017		4,122
	2018		636
	2019		104
	Total	$	16,823

Note_8_Restructuring_Costs_Tab

Note 8 - Restructuring Costs (Tables)	6 Months Ended
	Aug. 02, 2014
Restructuring and Related Activities [Abstract]	'
Restructuring and Related Costs [Table Text Block]	'
		Workforce			Facility Exit			Total			Cumulative
		Reduction			Costs						Restructuring
											Costs
	Liability, February 2, 2013	$	1,014		$	8		$	1,022		$	3,264
	Charges in fiscal 2014		1,696			610			2,306			2,306
	Cash payments		(2,347	)		(616	)		(2,963	)		-
	Liability, February 1, 2014		363			2			365			5,570
	Charges for the three months ended May 3, 2014		1,025			-			1,025			1,025
	Cash payments		(802	)		(2	)		(804	)		-
	Liability, May 3, 2014		586			-			586			6,595
	Charges for the three months ended August 2, 2014		46			-			46			46
	Cash payments		(386	)		-			(386	)		-
	Liability, August 2, 2014	$	246		$	-		$	246		$	6,641

Note_10_Commitments_and_Contin1

Note 10 - Commitments and Contingencies (Tables)	6 Months Ended
	Aug. 02, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Schedule of Product Warranty Liability [Table Text Block]	'
	Three Months Ended	Balance		Additions and Adjustments		Deductions			Balance End
		Beginning of							of Period
		Period
	2-Aug-14	$	630	$	117	$	(107	)	$	640
	3-Aug-13	$	1,050	$	192	$	(202	)	$	1,040
	Six Months Ended	Balance		Additions and Adjustments		Deductions			Balance End
		Beginning of							of Period
		Period
	2-Aug-14	$	620	$	241	$	(221	)	$	640
	3-Aug-13	$	1,447	$	38	$	(445	)	$	1,040

Note_11_Net_Loss_Per_Share_Tab

Note 11 - Net Loss Per Share (Tables)	6 Months Ended
	Aug. 02, 2014
Earnings Per Share [Abstract]	'
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]	'
		Three Months Ended				Six Months Ended
		August 2,		August 3,		August 2,		August 3,
		2014		2013		2014		2013
	Stock options excluded because exercise price is in excess of average stock price		3,904		4,513		3,956		4,677
	Stock options excluded because the effect of including would be anti-dilutive		7		18		8		21
	Restricted stock awards and units excluded because potential buyback shares exceed weighted average restricted stock units and awards outstanding		375		457		316		501
	Restricted stock awards and units excluded because the effect of including would be anti-dilutive		47		32		50		29

Note_12_Shareholders_Equity_an1

Note 12 - Shareholders' Equity and Employee Benefits (Tables)	6 Months Ended
	Aug. 02, 2014
Shareholders Equity And Employee Benefits Disclosure [Text Block] [Abstract]	'
Schedule of Stockholders Equity [Table Text Block]	'
		Common Stock					Treasury Stock						Accumulated Other
													Comprehensive Income
		Shares			Amount		Shares			Amount			Unrealized Gain (Loss)			Accumulated Translation Adjustment			Retained Earnings (Accumulated Deficit)			Total Shareholders’ Equity
	Balance, February 1, 2014		39,083,961		$	485,188		(4,659,143	)	$	(88,198	)	$	149		$	502		$	(239,250	)	$	158,391
	Unrealized loss on marketable securities		-			-		-			-			(92	)		-			-			(92	)
	Currency translation adjustments		-			-		-			-			-			(94	)		-			(94	)
	Stock-based compensation expense		-			2,873		-			-			-			-			-			2,873
	Tax effect related to stock options		(12,680	)		1,242		-			-			-			-			-			1,242
	Net proceeds from common stock issued under share plans		416,487			1,247		-			-			-			-			-			1,247
	Net loss		-			-		-			-			-			-			(17,534	)		(17,534	)
	Balance, August 2, 2014		39,487,768		$	490,550		(4,659,143	)	$	(88,198	)	$	57		$	408		$	(256,784	)	$	146,033

Note_14_Segment_and_Geographic1

Note 14 - Segment and Geographical Information (Tables)	6 Months Ended
	Aug. 02, 2014
Segment Reporting [Abstract]	'
Schedule of Segment Reporting Information, by Segment [Table Text Block]	'
	Three Months Ended	DTV			Home networking			Set-top box			Home control			License and other		Total
	2-Aug-14
	Revenue from external customers	$	10,033		$	17,827		$	5,528		$	6,576		$	2,846	$	42,810
	Gross profit	$	3,652		$	10,105		$	2,406		$	3,275		$	2,451	$	21,889
	3-Aug-13
	Revenue from external customers	$	14,438		$	19,557		$	11,480		$	5,849		$	2,438	$	53,762
	Gross profit	$	5,364		$	11,107		$	6,265		$	3,059		$	2,271	$	28,066
	Six Months Ended	DTV			Home networking			Set-top box			Home control			License and other		Total
	2-Aug-14
	Revenue from external customers	$	16,097		$	33,946		$	11,217		$	12,716		$	5,707	$	79,683
	Gross profit	$	6,523		$	19,027		$	5,121		$	6,498		$	4,945	$	42,114
	3-Aug-13
	Revenue from external customers	$	30,280		$	39,737		$	20,795		$	10,438		$	5,052	$	106,302
	Gross profit	$	11,357		$	23,348		$	10,518		$	4,991		$	4,798	$	55,012
Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block]	'
		Three Months Ended						Six Months Ended
		August 2,			August 3,			August 2,			August 3,
		2014			2013			2014			2013
	Total gross profit from target markets	$	21,889		$	28,066		$	42,114		$	55,012
	Operating expenses		27,684			29,913			56,352			60,959
	Gain on sale of development project		-			-			-			1,079
	Interest and other income, net		372			121			320			812
	Loss before income taxes	$	(5,423	)	$	(1,726	)	$	(13,918	)	$	(4,056	)
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]	'
		Three Months Ended						Six Months Ended
		August 2,			August 3,			August 2,			August 3,
		2014			2013			2014			2013
	Asia	$	34,073		$	40,426		$	63,318		$	78,466
	North America		5,209			5,630			9,546			10,660
	Europe		2,060			5,978			4,362			13,968
	Other Regions		1,468			1,728			2,457			3,208
	Net Revenue	$	42,810		$	53,762		$	79,683		$	106,302

Note_2_Cash_Cash_Equivalents_a2

Note 2 - Cash, Cash Equivalents and Marketable Securities (Details) (USD $)	Aug. 02, 2014	Feb. 01, 2014
In Millions, unless otherwise specified
Disclosure Text Block Supplement [Abstract]	'	'
Restricted Cash and Cash Equivalents	$1.50	$1.80

Note_2_Cash_Cash_Equivalents_a3

Note 2 - Cash, Cash Equivalents and Marketable Securities (Details) - Cash, Cash Equivalents and Marketable Securities (USD $)	6 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Aug. 02, 2014	Feb. 01, 2014	Aug. 03, 2013	Feb. 02, 2013
Note 2 - Cash, Cash Equivalents and Marketable Securities (Details) - Cash, Cash Equivalents and Marketable Securities [Line Items]	'	'	'	'
Book value	$29,086	$36,498	'	'
Net unrealized gain (loss)	247	319	'	'
Fair value - cash equivalents and marketable securities	29,333	36,817	'	'
Fair value - cash on hand	52,689	50,805	'	'
Fair value - cash, cash equivalents and marketable securities	82,022	87,622	'	'
Reported as:	'	'	'	'
Cash and cash equivalents	69,848	64,326	57,141	51,218
Short-term marketable securities	5,828	7,791	'	'
Long-term marketable securities	6,346	15,505	'	'
United States [Member]	'	'	'	'
Note 2 - Cash, Cash Equivalents and Marketable Securities (Details) - Cash, Cash Equivalents and Marketable Securities [Line Items]	'	'	'	'
Fair value - cash on hand	3,912	1,104	'	'
Overseas [Member]	'	'	'	'
Note 2 - Cash, Cash Equivalents and Marketable Securities (Details) - Cash, Cash Equivalents and Marketable Securities [Line Items]	'	'	'	'
Fair value - cash on hand	48,777	49,701	'	'
Corporate Bond Securities [Member]	'	'	'	'
Note 2 - Cash, Cash Equivalents and Marketable Securities (Details) - Cash, Cash Equivalents and Marketable Securities [Line Items]	'	'	'	'
Book value	10,644	21,186	'	'
Net unrealized gain (loss)	224	308	'	'
Fair value - cash equivalents and marketable securities	10,868	21,494	'	'
Money Market Funds [Member]	'	'	'	'
Note 2 - Cash, Cash Equivalents and Marketable Securities (Details) - Cash, Cash Equivalents and Marketable Securities [Line Items]	'	'	'	'
Book value	17,159	13,521	'	'
Fair value - cash equivalents and marketable securities	17,159	13,521	'	'
Municipal Bonds and Notes [Member]	'	'	'	'
Note 2 - Cash, Cash Equivalents and Marketable Securities (Details) - Cash, Cash Equivalents and Marketable Securities [Line Items]	'	'	'	'
Book value	'	505	'	'
Net unrealized gain (loss)	'	3	'	'
Fair value - cash equivalents and marketable securities	'	508	'	'
Fixed Income Funds [Member]	'	'	'	'
Note 2 - Cash, Cash Equivalents and Marketable Securities (Details) - Cash, Cash Equivalents and Marketable Securities [Line Items]	'	'	'	'
Book value	1,283	1,286	'	'
Net unrealized gain (loss)	23	8	'	'
Fair value - cash equivalents and marketable securities	$1,306	$1,294	'	'

Note_2_Cash_Cash_Equivalents_a4

Note 2 - Cash, Cash Equivalents and Marketable Securities (Details) - Amortized Cost and Estimated Fair Value of Cash Equivalents and Marketable Securities by Maturity (USD $)	Aug. 02, 2014	Feb. 01, 2014
In Thousands, unless otherwise specified
Note 2 - Cash, Cash Equivalents and Marketable Securities (Details) - Amortized Cost and Estimated Fair Value of Cash Equivalents and Marketable Securities by Maturity [Line Items]	'	'
Book Value	$29,086	$36,498
Fair Value	29,333	36,817
Due in 1 Year or Less [Member]	'	'
Note 2 - Cash, Cash Equivalents and Marketable Securities (Details) - Amortized Cost and Estimated Fair Value of Cash Equivalents and Marketable Securities by Maturity [Line Items]	'	'
Book Value	22,964	21,284
Fair Value	22,987	21,312
Due in Greater Than 1 Year [Member]	'	'
Note 2 - Cash, Cash Equivalents and Marketable Securities (Details) - Amortized Cost and Estimated Fair Value of Cash Equivalents and Marketable Securities by Maturity [Line Items]	'	'
Book Value	6,122	15,214
Fair Value	$6,346	$15,505

Note_3_Fair_Values_of_Assets_a2

Note 3 - Fair Values of Assets and Liabilities (Details) (Equity Investments and Promissory Notes Receivable [Member], USD $)	Aug. 02, 2014
In Millions, unless otherwise specified
Equity Investments and Promissory Notes Receivable [Member]	'
Note 3 - Fair Values of Assets and Liabilities (Details) [Line Items]	'
Investment Owned, at Cost	$3.30

Note_3_Fair_Values_of_Assets_a3

Note 3 - Fair Values of Assets and Liabilities (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis (USD $)	Aug. 02, 2014	Feb. 01, 2014
In Thousands, unless otherwise specified
Note 3 - Fair Values of Assets and Liabilities (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'	'
Cash equivalents and short-term investments	$29,333	$36,817
Restricted cash	1,540	1,775
Derivative instruments asset	'	35
Total assets/liabilities measured at fair value	30,873	38,627
Fair Value, Inputs, Level 1 [Member]	'	'
Note 3 - Fair Values of Assets and Liabilities (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'	'
Cash equivalents and short-term investments	29,333	36,817
Restricted cash	1,540	1,775
Total assets/liabilities measured at fair value	30,873	38,592
Fair Value, Inputs, Level 2 [Member]	'	'
Note 3 - Fair Values of Assets and Liabilities (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'	'
Derivative instruments asset	'	35
Total assets/liabilities measured at fair value	'	35
Corporate Bond Securities [Member] | Fair Value, Inputs, Level 1 [Member]	'	'
Note 3 - Fair Values of Assets and Liabilities (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'	'
Cash equivalents and short-term investments	10,868	21,494
Corporate Bond Securities [Member]	'	'
Note 3 - Fair Values of Assets and Liabilities (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'	'
Cash equivalents and short-term investments	10,868	21,494
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]	'	'
Note 3 - Fair Values of Assets and Liabilities (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'	'
Cash equivalents and short-term investments	17,159	13,521
Money Market Funds [Member]	'	'
Note 3 - Fair Values of Assets and Liabilities (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'	'
Cash equivalents and short-term investments	17,159	13,521
Fixed Income Funds [Member] | Fair Value, Inputs, Level 1 [Member]	'	'
Note 3 - Fair Values of Assets and Liabilities (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'	'
Cash equivalents and short-term investments	1,306	1,294
Fixed Income Funds [Member]	'	'
Note 3 - Fair Values of Assets and Liabilities (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'	'
Cash equivalents and short-term investments	1,306	1,294
Municipal Bonds and Notes [Member] | Fair Value, Inputs, Level 1 [Member]	'	'
Note 3 - Fair Values of Assets and Liabilities (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'	'
Cash equivalents and short-term investments	'	508
Municipal Bonds and Notes [Member]	'	'
Note 3 - Fair Values of Assets and Liabilities (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]	'	'
Cash equivalents and short-term investments	'	$508

Note_4_Derivative_Financial_In2

Note 4 - Derivative Financial Instruments (Details)	3 Months Ended		6 Months Ended
	Aug. 02, 2014	Aug. 03, 2013	Aug. 02, 2014	Aug. 03, 2013	Feb. 01, 2014	Feb. 01, 2014
	USD ($)	USD ($)	USD ($)	USD ($)	USD ($)	ILS
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'	'	'	'	'	'
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value	$0	'	$0	'	$900,000	'
Derivative Asset, Notional Amount (in New Shekels)	'	'	'	'	'	3,300,000
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	$0	($300,000)	($100,000)	($200,000)	'	'

Note_4_Derivative_Financial_In3

Note 4 - Derivative Financial Instruments (Details) - Fair Value of Outstanding Derivative Instruments (USD $)	Feb. 01, 2014
In Thousands, unless otherwise specified
Derivatives, Fair Value [Line Items]	'
Total fair value of derivative instruments	$35
Prepaid Expenses and Other Current Assets [Member]	'
Derivatives, Fair Value [Line Items]	'
Foreign exchange contracts not designated as cash flow hedges	$35

Note_5_Investments_in_and_Note2

Note 5 - Investments in and Notes Receivable from Privately Held Companies (Details) (USD $)	3 Months Ended		12 Months Ended	3 Months Ended
In Millions, unless otherwise specified	Aug. 02, 2014	Jan. 30, 2010	Jan. 31, 2009	Oct. 30, 2010	Feb. 01, 2014	Jan. 29, 2011	Oct. 29, 2011
		Issuer A [Member]	Issuer A [Member]	Issuer B [Member]	Issuer C [Member]	Issuer C [Member]	Issuer D [Member]
		Preferred Stock Investments [Member]	Preferred Stock Investments [Member]	Preferred Stock Investments [Member]	Preferred Stock Investments [Member]	Preferred Stock Investments [Member]
Note 5 - Investments in and Notes Receivable from Privately Held Companies (Details) [Line Items]	'	'	'	'	'	'	'
Payments to Acquire Investments	'	$1	$1	$1	'	$1	$0.10
Other than Temporary Impairment Losses, Investments	$0.60	'	'	'	$0.30	'	'

Note_5_Investments_in_and_Note3

Note 5 - Investments in and Notes Receivable from Privately Held Companies (Details) - Value of Investments in and Notes Receivable from Privately Held Companies (USD $)	Aug. 02, 2014	Feb. 01, 2014
In Thousands, unless otherwise specified
Note 5 - Investments in and Notes Receivable from Privately Held Companies (Details) - Value of Investments in and Notes Receivable from Privately Held Companies [Line Items]	'	'
Equity investments	$3,271	$3,873
Issuer A [Member]	'	'
Note 5 - Investments in and Notes Receivable from Privately Held Companies (Details) - Value of Investments in and Notes Receivable from Privately Held Companies [Line Items]	'	'
Equity investments	2,000	2,000
Notes receivable:	'	'
Note receivable	'	230
Total equity investments and notes receivable	3,271	4,103
Issuer B [Member]	'	'
Note 5 - Investments in and Notes Receivable from Privately Held Companies (Details) - Value of Investments in and Notes Receivable from Privately Held Companies [Line Items]	'	'
Equity investments	1,000	1,000
Issuer C [Member]	'	'
Note 5 - Investments in and Notes Receivable from Privately Held Companies (Details) - Value of Investments in and Notes Receivable from Privately Held Companies [Line Items]	'	'
Equity investments	129	730
Issuer D [Member]	'	'
Note 5 - Investments in and Notes Receivable from Privately Held Companies (Details) - Value of Investments in and Notes Receivable from Privately Held Companies [Line Items]	'	'
Equity investments	$142	$143

Note_6_Composition_of_Certain_2

Note 6 - Composition of Certain Financial Statement Captions (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Aug. 02, 2014	Aug. 03, 2013	Aug. 02, 2014	Aug. 03, 2013
Disclosure Text Block Supplement [Abstract]	'	'	'	'
Depreciation, Depletion and Amortization, Nonproduction	$3	$2.10	$6.10	$5

Note_6_Composition_of_Certain_3

Note 6 - Composition of Certain Financial Statement Captions (Details) - Inventories (USD $)	Aug. 02, 2014	Feb. 01, 2014
In Thousands, unless otherwise specified
Inventories [Abstract]	'	'
Wafers and other purchased materials	$9,783	$10,079
Work-in-process	4,116	1,527
Finished goods	6,406	8,797
Total inventory	$20,305	$20,403

Note_6_Composition_of_Certain_4

Note 6 - Composition of Certain Financial Statement Captions (Details) - Prepaid Expenses and Other Current Assets (USD $)	Aug. 02, 2014	Feb. 01, 2014
In Thousands, unless otherwise specified
Prepaid Expenses and Other Current Assets [Abstract]	'	'
Prepayments for inventory	$1,680	$1,670
Note receivable	'	230
Amounts due from seller related to DTV acquisition	'	1,439
Other current assets	5,020	4,730
Total prepaid expenses and other current assets	$6,700	$8,069

Note_6_Composition_of_Certain_5

Note 6 - Composition of Certain Financial Statement Captions (Details) - Software, Equipment and Leasehold Improvements (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Aug. 02, 2014	Feb. 01, 2014
Property, Plant and Equipment [Line Items]	'	'
Property, plant and equipment balances	$72,477	$71,665
Less: Accumulated depreciation and amortization	-50,194	-44,576
Total software, equipment and leasehold improvements, net	22,283	27,089
Software and Software Development Costs [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Estimated Useful Lives (years)	'2 years	'
Property, plant and equipment balances	38,613	38,563
Equipment [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property, plant and equipment balances	21,883	21,147
Equipment [Member] | Minimum [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Estimated Useful Lives (years)	'1 year	'
Equipment [Member] | Maximum [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Estimated Useful Lives (years)	'5 years	'
Office Equipment [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Estimated Useful Lives (years)	'2 years	'
Property, plant and equipment balances	8,831	8,806
Leasehold Improvements [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property, plant and equipment balances	$3,150	$3,149
Leasehold Improvements [Member] | Minimum [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Estimated Useful Lives (years)	'1 year	'
Leasehold Improvements [Member] | Maximum [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Estimated Useful Lives (years)	'6 years	'

Note_6_Composition_of_Certain_6

Note 6 - Composition of Certain Financial Statement Captions (Details) - Accrued Liabilities (USD $)	Aug. 02, 2014	3-May-14	Feb. 01, 2014	Aug. 03, 2013	4-May-13	Feb. 02, 2013
In Thousands, unless otherwise specified
Accrued Liabilities [Abstract]	'	'	'	'	'	'
Income taxes payable, current portion	$3,988	'	$7,968	'	'	'
Rebates	3,903	'	3,587	'	'	'
License fees	2,174	'	1,929	'	'	'
Warranties	640	630	620	1,040	1,050	1,447
Royalties	629	'	985	'	'	'
Deferred revenue	270	'	3,001	'	'	'
Settlements	'	'	150	'	'	'
Other accrued liabilities	2,056	'	1,573	'	'	'
Total accrued liabilities	$13,660	'	$19,813	'	'	'

Note_7_Intangible_Assets_Detai

Note 7 - Intangible Assets (Details) - Acquired Intangible Assets, Subject to Amortization (USD $)	6 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Aug. 02, 2014	Feb. 01, 2014
Acquired intangible assets:	'	'
Acquired Intangible, Gross Value	$167,132	$165,760
Acquired Intangible, Accumulated Impairment Charges	-64,085	-63,632
Acquired Intangible, Accumulated Amortization and Effect of Currency Translation	-76,980	-72,348
Acquired Intangible, Net Value	26,067	29,780
Developed Technology Rights [Member]	'	'
Acquired intangible assets:	'	'
Acquired Intangible, Gross Value	76,639	76,639
Acquired Intangible, Accumulated Impairment Charges	-24,614	-24,614
Acquired Intangible, Accumulated Amortization and Effect of Currency Translation	-42,490	-40,334
Acquired Intangible, Net Value	9,535	11,691
Acquired Intangible, Weighted Average Remaining Amortization Period	'2 years 146 days	'2 years 328 days
Customer Relationships [Member]	'	'
Acquired intangible assets:	'	'
Acquired Intangible, Gross Value	50,704	50,704
Acquired Intangible, Accumulated Impairment Charges	-30,486	-30,486
Acquired Intangible, Accumulated Amortization and Effect of Currency Translation	-17,680	-17,048
Acquired Intangible, Net Value	2,538	3,170
Acquired Intangible, Weighted Average Remaining Amortization Period	'2 years 73 days	'2 years 255 days
Trademarks and Other [Member]	'	'
Acquired intangible assets:	'	'
Acquired Intangible, Gross Value	4,078	4,078
Acquired Intangible, Accumulated Amortization and Effect of Currency Translation	-3,561	-3,502
Acquired Intangible, Net Value	517	576
Acquired Intangible, Weighted Average Remaining Amortization Period	'4 years 146 days	'4 years 328 days
Purchased IP-Amortizing [Member]	'	'
Acquired intangible assets:	'	'
Acquired Intangible, Gross Value	22,998	21,569
Acquired Intangible, Accumulated Impairment Charges	-5,516	-5,516
Acquired Intangible, Accumulated Amortization and Effect of Currency Translation	-13,249	-11,464
Acquired Intangible, Net Value	4,233	4,589
Acquired Intangible, Weighted Average Remaining Amortization Period	'1 year 109 days	'1 year 6 months
Acquired Intangible Assets Subtotal [Member]	'	'
Acquired intangible assets:	'	'
Acquired Intangible, Gross Value	154,419	152,990
Acquired Intangible, Accumulated Impairment Charges	-60,616	-60,616
Acquired Intangible, Accumulated Amortization and Effect of Currency Translation	-76,980	-72,348
Acquired Intangible, Net Value	16,823	20,026
Acquired Intangible, Weighted Average Remaining Amortization Period	'2 years 73 days	'2 years 219 days
Purchased Intellectual Property - not yet deployed [Member]	'	'
Acquired intangible assets:	'	'
Acquired Intangible, Gross Value	12,713	12,770
Acquired Intangible, Accumulated Impairment Charges	-3,469	-3,016
Acquired Intangible, Net Value	$9,244	$9,754

Note_7_Intangible_Assets_Detai1

Note 7 - Intangible Assets (Details) - Amortization of Intangible Assets (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Aug. 02, 2014	4-May-13	Aug. 02, 2014	Aug. 03, 2013
Note 7 - Intangible Assets (Details) - Amortization of Intangible Assets [Line Items]	'	'	'	'
Intangible Asset Amortization Expense	$2,353	$2,652	$4,672	$5,373
Cost of Sales [Member]	'	'	'	'
Note 7 - Intangible Assets (Details) - Amortization of Intangible Assets [Line Items]	'	'	'	'
Intangible Asset Amortization Expense	1,979	2,264	3,925	4,591
Operating Expense [Member]	'	'	'	'
Note 7 - Intangible Assets (Details) - Amortization of Intangible Assets [Line Items]	'	'	'	'
Intangible Asset Amortization Expense	$374	$388	$747	$782

Note_7_Intangible_Assets_Detai2

Note 7 - Intangible Assets (Details) - Future Amortization Expense Related to Acquired Intangible Assets (USD $)	Aug. 02, 2014
In Thousands, unless otherwise specified
Future Amortization Expense Related to Acquired Intangible Assets [Abstract]	'
2015 (remaining six months)	$4,672
2016	7,289
2017	4,122
2018	636
2019	104
Total	$16,823

Note_8_Restructuring_Costs_Det

Note 8 - Restructuring Costs (Details) (USD $)	3 Months Ended				6 Months Ended
	Aug. 02, 2014	3-May-14	Aug. 03, 2013	4-May-13	Aug. 03, 2013
Note 8 - Restructuring Costs (Details) [Line Items]	'	'	'	'	'
Restructuring and Related Cost, Incurred Cost	$100,000	$1,000,000	'	$300,000	'
Restructuring and Related Cost, Number of Positions Eliminated	'	29	8	17	'
Restructuring Costs	'	'	'	'	830,000
Cost of Sales [Member]	'	'	'	'	'
Note 8 - Restructuring Costs (Details) [Line Items]	'	'	'	'	'
Restructuring and Related Cost, Incurred Cost	'	100,000	'	'	'
Operating Expense [Member]	'	'	'	'	'
Note 8 - Restructuring Costs (Details) [Line Items]	'	'	'	'	'
Restructuring and Related Cost, Incurred Cost	'	900,000	'	'	'
Facility Closing [Member]	'	'	'	'	'
Note 8 - Restructuring Costs (Details) [Line Items]	'	'	'	'	'
Restructuring Costs	'	'	500,000	'	'
Employee Severance [Member]	'	'	'	'	'
Note 8 - Restructuring Costs (Details) [Line Items]	'	'	'	'	'
Restructuring Costs	'	'	200,000	'	'

Note_8_Restructuring_Costs_Det1

Note 8 - Restructuring Costs (Details) - Summary of Restructuring Costs, Outstanding Payable Balance and Cumulative Restructuring Costs (USD $)

3 Months Ended

6 Months Ended

3 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

In Thousands, unless otherwise specified

Aug. 02, 2014

Aug. 03, 2013

Aug. 02, 2014

Aug. 03, 2013

Aug. 02, 2014

3-May-14

Feb. 01, 2014

3-May-14

Feb. 01, 2014

Aug. 02, 2014

3-May-14

Feb. 01, 2014

Aug. 02, 2014

3-May-14

Feb. 01, 2014

Employee Severance [Member]

Employee Severance [Member]

Employee Severance [Member]

Facility Closing [Member]

Facility Closing [Member]

Total Restructuring Charges [Member]

Total Restructuring Charges [Member]

Total Restructuring Charges [Member]

Cumulative Restructuring Costs [Member]

Cumulative Restructuring Costs [Member]

Cumulative Restructuring Costs [Member]

Restructuring Cost and Reserve [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Liability, February 2, 2013

'

'

'

'

$586

$363

$1,014

$2

$8

$586

$365

$1,022

$6,595

$5,570

$3,264

Charges

46

680

1,020

890

46

1,025

1,696

'

610

46

1,025

2,306

46

1,025

2,306

Cash payments

'

'

'

'

-386

-802

-2,347

-2

-616

-386

-804

-2,963

'

'

'

Liability balance

'

'

'

'

$246

$586

$363

'

$2

$246

$586

$365

$6,641

$6,595

$5,570

Note_9_Sale_of_Development_Pro1

Note 9 - Sale of Development Project (Details) (USD $)	1 Months Ended	6 Months Ended				0 Months Ended			0 Months Ended
	Apr. 30, 2013	Aug. 03, 2013	Aug. 02, 2014	Feb. 01, 2014	Mar. 08, 2013	Mar. 08, 2013	Mar. 08, 2013	Mar. 08, 2013	Mar. 08, 2013
						MoCa [Member]	MoCa [Member]	MoCa [Member]	Additional After Timely First Milestone [Member]
						Closing Consideration [Member]	Payroll Expense Reimbursement [Member]
Note 9 - Sale of Development Project (Details) [Line Items]	'	'	'	'	'	'	'	'	'
Number of Employees Transferred	'	'	'	'	21	'	'	'	'
Assets	'	'	$196,318,000	$215,775,000	'	'	'	$600,000	'
Revenue Recognition, Milestone Method, Revenue Recognized	'	'	'	'	'	2,000,000	600,000	'	5,000,000
Gain (Loss) on Sale of Project	1,100,000	1,079,000	'	'	'	'	'	'	'
Connectivity Assets Legal Fees and Bank Services	400,000	'	'	'	'	'	'	'	'
Proceeds from Payroll Transfer	$600,000	'	'	'	'	'	'	'	'

Note_10_Commitments_and_Contin2

Note 10 - Commitments and Contingencies (Details) (USD $)

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

12 Months Ended

3 Months Ended

In Millions, unless otherwise specified

Oct. 27, 2012

Aug. 02, 2014

3-May-14

Feb. 02, 2013

Aug. 02, 2014

Aug. 03, 2013

Aug. 02, 2014

Aug. 03, 2013

Aug. 02, 2014

Feb. 01, 2014

Aug. 02, 2014

Oct. 27, 2012

Cost of Sales [Member]

Cost of Sales [Member]

Cost of Sales [Member]

Cost of Sales [Member]

Selling and Marketing Expense [Member]

Design Tool Licences [Member]

Design Tool Licences [Member]

Second Licensed Technology Audit Settlement [Member]

Note 10 - Commitments and Contingencies (Details) [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Purchase Commitment, Remaining Minimum Amount Committed

'

$39.30

'

'

'

'

'

'

'

'

$9.50

'

Long-term Purchase Commitment, Amount

'

'

'

'

'

'

'

'

'

12.9

'

'

Contractual Obligation

'

0

'

'

'

'

'

'

'

'

'

'

Direct Operating Cost, Royalty Expense

'

'

'

'

0.5

0.6

1.1

1.1

'

'

'

'

Proceeds from Grantors

'

5.2

'

'

'

'

'

'

'

'

'

'

Percentage of Royalties

'

4.50%

'

'

'

'

'

'

'

'

'

'

Accrued Royalties

'

1.1

'

'

'

'

'

'

'

'

'

'

Payments for Other Operating Activities

'

'

'

'

'

'

'

'

'

'

'

0.3

Licensing Period Under Negotiation

'3 years

'

'

'

'

'

'

'

'

'

'

'

Licensing Fees Under Negotiation

'

'

'

3.5

'

'

'

'

'

'

'

'

Loss Contingency Accrual

'

'

0.2

'

'

'

'

'

'

'

'

'

Loss Contingency, Loss in Period

'

'

'

'

'

'

'

'

$0.10

'

'

'

Note_10_Commitments_and_Contin3

Note 10 - Commitments and Contingencies (Details) - Change in Accrued Warranty (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Aug. 02, 2014	Aug. 03, 2013	Aug. 02, 2014	Aug. 03, 2013
Change in Accrued Warranty [Abstract]	'	'	'	'
Balance, Beginning of Period	$630	$1,050	$620	$1,447
Additions and Adjustments	117	192	241	38
Deductions	-107	-202	-221	-445
Balance, End of Period	$640	$1,040	$640	$1,040

Note_11_Net_Loss_Per_Share_Det

Note 11 - Net Loss Per Share (Details) - Excluded Anti-Diluted and Excluded Potentially Dilutive Securities	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Aug. 02, 2014	Aug. 03, 2013	Aug. 02, 2014	Aug. 03, 2013
Employee Stock Option [Member] | Excluded Because Exercise Price is in Excess of Average Stock Price [Member]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Options and awards excluded	3,904	4,513	3,956	4,677
Employee Stock Option [Member] | Excluded Because the Effect of Including Would be Anti-Dilutive [Member]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Options and awards excluded	7	18	8	21
Restricted Stock [Member] | Excluded Because the Effect of Including Would be Anti-Dilutive [Member]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Options and awards excluded	47	32	50	29
Restricted Stock [Member] | Excluded Because Potential Buyback Shares Exceed Weighted Average Restricted Stock Units and Awards Outstanding [Member]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Options and awards excluded	375	457	316	501

Note_12_Shareholders_Equity_an2

Note 12 - Shareholders' Equity and Employee Benefits (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Aug. 02, 2014	Aug. 03, 2013	Aug. 02, 2014	Aug. 03, 2013
Endowment Insurance Pension Plan [Member]	'	'	'	'
Note 12 - Shareholders' Equity and Employee Benefits (Details) [Line Items]	'	'	'	'
Defined Contribution Plan, Employer Discretionary Contribution Amount	$0.50	$0.40	$1	$1.10
Retirement Pension Plan [Member]	'	'	'	'
Note 12 - Shareholders' Equity and Employee Benefits (Details) [Line Items]	'	'	'	'
Defined Contribution Plan, Employer Discretionary Contribution Amount	0.2	0.2	0.5	0.5
Severance Plan [Member]	'	'	'	'
Note 12 - Shareholders' Equity and Employee Benefits (Details) [Line Items]	'	'	'	'
Supplemental Unemployment Benefits, Severance Benefits	1.4	'	1.4	'
Defined Benefit Plan, Assets for Plan Benefits	$1.30	'	$1.30	'
Endowment Insurance Pension Plan [Member]	'	'	'	'
Note 12 - Shareholders' Equity and Employee Benefits (Details) [Line Items]	'	'	'	'
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	'	'	8.00%	'
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	'	'	21.00%	'

Note_12_Shareholders_Equity_an3

Note 12 - Shareholders' Equity and Employee Benefits (Details) - Condensed Consolidated Statement of Shareholdersb Equity (USD $)	3 Months Ended		6 Months Ended					6 Months Ended
In Thousands, except Share data, unless otherwise specified	Aug. 02, 2014	Aug. 03, 2013	Aug. 02, 2014	Aug. 03, 2013	Aug. 02, 2014	Aug. 02, 2014	Feb. 01, 2014	Aug. 02, 2014	Aug. 02, 2014	Aug. 02, 2014
					Common Stock [Member]	Treasury Stock [Member]	Treasury Stock [Member]	Accumulated Net Unrealized Investment Gain (Loss) [Member]	Accumulated Translation Adjustment [Member]	Retained Earnings [Member]
Note 12 - Shareholders' Equity and Employee Benefits (Details) - Condensed Consolidated Statement of Shareholdersb Equity [Line Items]	'	'	'	'	'	'	'	'	'	'
Balance, February 1, 2014 (in Shares)	'	'	'	'	39,083,961	-4,659,143	-4,659,143	'	'	'
Balance, February 1, 2014	'	'	$158,391	'	$485,188	($88,198)	($88,198)	$149	$502	($239,250)
Unrealized loss on marketable securities	-138	-153	-92	-196	'	'	'	-92	'	'
Currency translation adjustments	'	'	-94	'	'	'	'	'	-94	'
Stock-based compensation expense	'	'	2,873	'	2,873	'	'	'	'	'
Tax effect related to stock options	'	'	1,242	'	1,242	'	'	'	'	'
Tax effect related to stock options (in Shares)	'	'	'	'	-12,680	'	'	'	'	'
Net proceeds from common stock issued under share plans (in Shares)	'	'	'	'	416,487	'	'	'	'	'
Net proceeds from common stock issued under share plans	'	'	1,247	'	1,247	'	'	'	'	'
Net loss	-7,620	-4,791	-17,534	-9,324	'	'	'	'	'	-17,534
Balance, August 2, 2014 (in Shares)	'	'	'	'	39,487,768	-4,659,143	-4,659,143	'	'	'
Balance, August 2, 2014	$146,033	'	$146,033	'	$490,550	($88,198)	($88,198)	$57	$408	($256,784)

Note_13_Income_taxes_Details

Note 13 - Income taxes (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Aug. 02, 2014	Aug. 03, 2013	Aug. 02, 2014	Aug. 03, 2013
Income Tax Disclosure [Abstract]	'	'	'	'
Income Tax Expense (Benefit)	$2,197	$3,065	$3,616	$5,268

Note_14_Segment_and_Geographic2

Note 14 - Segment and Geographical Information (Details)	6 Months Ended	3 Months Ended	6 Months Ended		3 Months Ended	6 Months Ended		12 Months Ended
	Aug. 02, 2014	Aug. 02, 2014	Aug. 02, 2014	Aug. 02, 2014	Aug. 03, 2013	Aug. 03, 2013	Aug. 02, 2014	Feb. 01, 2014	Feb. 01, 2014	Feb. 01, 2014	Feb. 01, 2014
		Benchmark Electronics [Member]	Benchmark Electronics [Member]	Benchmark Electronics [Member]	Flextronics [Member]	Flextronics [Member]	Nanning Fugui Precision [Member]	Customer 1 [Member]	Customer 2 [Member]	Customer 3 [Member]	Customer 4 [Member]
		Sales Revenue, Net [Member]	Sales Revenue, Net [Member]	Accounts Receivable [Member]	Sales Revenue, Net [Member]	Sales Revenue, Net [Member]	Accounts Receivable [Member]	Accounts Receivable [Member]	Accounts Receivable [Member]	Accounts Receivable [Member]	Accounts Receivable [Member]
		Customer Concentration Risk [Member]	Customer Concentration Risk [Member]	Customer Concentration Risk [Member]	Customer Concentration Risk [Member]	Customer Concentration Risk [Member]	Customer Concentration Risk [Member]	Customer Concentration Risk [Member]	Customer Concentration Risk [Member]	Customer Concentration Risk [Member]	Customer Concentration Risk [Member]
Note 14 - Segment and Geographical Information (Details) [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Number of Reportable Segments	1	'	'	'	'	'	'	'	'	'	'
Concentration Risk, Percentage	'	14.00%	13.00%	14.00%	10.00%	12.00%	10.00%	15.00%	12.00%	11.00%	10.00%

Note_14_Segment_and_Geographic3

Note 14 - Segment and Geographical Information (Details) - Revenue Attributable to Each Target Market (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Aug. 02, 2014	Aug. 03, 2013	Aug. 02, 2014	Aug. 03, 2013
Segment Reporting Information [Line Items]	'	'	'	'
Revenue from external customers	$42,810	$53,762	$79,683	$106,302
Gross profit	21,889	28,066	42,114	55,012
DTV [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Revenue from external customers	10,033	14,438	16,097	30,280
Gross profit	3,652	5,364	6,523	11,357
Home Networking [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Revenue from external customers	17,827	19,557	33,946	39,737
Gross profit	10,105	11,107	19,027	23,348
Set-Top Box [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Revenue from external customers	5,528	11,480	11,217	20,795
Gross profit	2,406	6,265	5,121	10,518
Home Control and Energy Management [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Revenue from external customers	6,576	5,849	12,716	10,438
Gross profit	3,275	3,059	6,498	4,991
License and Other [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Revenue from external customers	2,846	2,438	5,707	5,052
Gross profit	$2,451	$2,271	$4,945	$4,798

Note_14_Segment_and_Geographic4

Note 14 - Segment and Geographical Information (Details) - Reconciliation of Target Market Profit to Consolidated Loss before Income Taxes (USD $)	1 Months Ended	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Apr. 30, 2013	Aug. 02, 2014	Aug. 03, 2013	Aug. 02, 2014	Aug. 03, 2013
Reconciliation of Target Market Profit to Consolidated Loss before Income Taxes [Abstract]	'	'	'	'	'
Total gross profit from target markets	'	$21,889	$28,066	$42,114	$55,012
Operating expenses	'	27,684	29,913	56,352	60,959
Gain on sale of development project	1,100	'	'	'	1,079
Interest and other income, net	'	372	121	320	812
Loss before income taxes	'	($5,423)	($1,726)	($13,918)	($4,056)

Note_14_Segment_and_Geographic5

Note 14 - Segment and Geographical Information (Details) - Net Revenue Based on the Ship-to Location (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Aug. 02, 2014	Aug. 03, 2013	Aug. 02, 2014	Aug. 03, 2013
Note 14 - Segment and Geographical Information (Details) - Net Revenue Based on the Ship-to Location [Line Items]	'	'	'	'
Net revenue	$42,810	$53,762	$79,683	$106,302
Asia [Member]	'	'	'	'
Note 14 - Segment and Geographical Information (Details) - Net Revenue Based on the Ship-to Location [Line Items]	'	'	'	'
Net revenue	34,073	40,426	63,318	78,466
North America [Member]	'	'	'	'
Note 14 - Segment and Geographical Information (Details) - Net Revenue Based on the Ship-to Location [Line Items]	'	'	'	'
Net revenue	5,209	5,630	9,546	10,660
Europe [Member]	'	'	'	'
Note 14 - Segment and Geographical Information (Details) - Net Revenue Based on the Ship-to Location [Line Items]	'	'	'	'
Net revenue	2,060	5,978	4,362	13,968
Other Regions [Member]	'	'	'	'
Note 14 - Segment and Geographical Information (Details) - Net Revenue Based on the Ship-to Location [Line Items]	'	'	'	'
Net revenue	$1,468	$1,728	$2,457	$3,208