Note 17. Equity Incentive Plans and Employee Benefits (Tables)

12 Months Ended

Feb. 02, 2013

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

	Number of Options Outstanding			Weighted Average Exercise Price per Share		Weighted Average Remaining Contractual Term (Years)		Aggregate Intrinsic Value
As of January 30, 2010		5,745,795		$	11.96		7.4
Granted (Weighted average fair value of $5.95)		1,161,350			11.14
Cancelled		(356,305	)		12.90
Exercised		(466,715	)		5.20
As of January 29, 2011		6,084,125			12.26		6.9
Granted (Weighted average fair value of $5.26)		532,800			10.22
Cancelled		(479,119	)		11.87
Exercised		(291,779	)		5.14
As of January 28, 2012		5,846,027			12.47		6.2
Granted (Weighted average fair value of $2.77)		205,000			5.77
Cancelled		(848,930	)		12.35
Exercised		(146,310	)		2.60
As of February 2, 2013		5,055,787		$	12.50		4.9	$	272,117
Ending vested and expected to vest		5,005,958		$	12.54		4.9	$	256,991
Ending exercisable		3,790,842		$	13.31		4.2	$	174,904

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]

Options Outstanding										Options Exercisable
Range of Exercise Prices Per Share				Number of Shares Outstanding as of February 2, 2013		Weighted Average Remaining Life (Years)		Weighted Average Exercise Price Per Share		Number of Shares Exercisable as of February 2, 2013		Weighted Average Exercise Price Per Share
$	0.92	$	6.67		526,965		6.6	$	5.40		179,622	$	4.79
	7.32		10.51		511,251		3.4		8.79		448,775		8.60
	10.59		10.59		544,546		6.0		10.59		333,966		10.59
	10.87		10.87		511,318		5.1		10.87		428,284		10.87
	11.06		11.07		865,696		4.8		11.06		714,051		11.06
	11.09		11.47		522,464		4.0		11.27		466,426		11.28
	11.66		12.21		544,840		5.8		11.92		347,264		11.95
	12.27		15.91		546,826		4.0		14.77		408,804		14.78
	16.25		41.58		431,881		4.0		28.26		413,650		28.77
	45.83		45.83		50,000		4.8		45.83		50,000		45.83
$	0.92	$	45.83		5,055,787		4.9	$	12.50		3,790,842	$	13.31

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]

	Restricted Stock Awards			Weighted Average Grant Date Fair Value per Award		Aggregate Value
As of January 30, 2010		-		$	-	$	-
Granted		85,137			13.39
As of January 29, 2011		85,137			13.39		1,139,984
Granted		163,070			6.91
Vested		(17,028	)		13.39
As of January 28, 2012		231,179			8.82		2,038,473
Granted		10,980			6.83
Vested		(78,848	)		8.77
As of February 2, 2013		163,311		$	8.71	$	1,422,439

	Restricted Stock Units			Weighted Average Grant Date Fair Value per Unit		Aggregate Value
As of January 29, 2011		-		$	-	$	-
Granted		597,500			6.52
Cancelled/forfeited		(50,000	)		6.64
As of January 28, 2012		547,500			6.51		3,566,040
Granted		313,003			6.03
Vested		(118,766	)		6.51
Cancelled/forfeited		(109,475	)		6.45
As of February 2, 2013		632,262		$	6.28	$	3,972,964

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	Fiscal Years Ended
Stock options	February 2, 2013			January 28, 2012			January 29, 2011
Expected volatility		51.31	%		52.01	%		55.02	%
Risk-free interest rate		0.92	%		1.60	%		2.54	%
Expected term (in years)		5.87			5.94			5.94
Dividend yield		0	%		0	%		0	%
Weighted average fair value at grant date	$	2.77		$	5.27		$	5.95

	Fiscal Years Ended
Employee stock purchase plan	February 2, 2013			January 28, 2012			January 29, 2011
Expected volatility		37.84	%		46.03	%		37.52	%
Risk-free interest rate		0.13	%		0.08	%		0.21	%
Expected term (in years)		0.49			0.49			0.50
Dividend yield		0	%		0	%		0	%
Weighted average fair value at grant date	$	1.47		$	1.85		$	2.94

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]

	Fiscal Years Ended
	February 2, 2013		January 28, 2012		January 29, 2011
Cost of revenue	$	487	$	478	$	560
Research and development		5,740		6,277		6,745
Sales and marketing		1,811		2,137		2,094
General and administrative		2,557		3,133		3,178
Total stock-based compensation	$	10,595	$	12,025	$	12,577

Schedule of Shares Reserved for Future Issuance [Table Text Block]

	Shares Reserved
Stock options outstanding		5,055,787
Authorized for future grants under stock incentive plans		2,101,158
Authorized for future issuance under stock purchase plans		929,826
Restricted stock units outstanding		632,262
Shares reserved for future issuance		8,719,033