Note 18 - Equity Incentive Plans and Employee Benefits (Tables)

12 Months Ended

Feb. 01, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

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 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
Granted (Weighted average fair value of $2.36)		690,423			5.39
Cancelled		(1,631,375	)		12.78
Exercised		(20,214	)		2.64
As of February 1, 2014		4,094,621		$	11.24		4.8	$	67,124
Ending vested and expected to vest		4,062,314		$	11.28		4.8	$	67,124
Ending exercisable		2,989,653		$	12.79		4.1	$	33,456

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

Options Outstanding and Exercisable
Range of Exercise Prices			Number Oustanding as of 2/1/14		Weighted Average Remaining Contractual Term		Weighted Average Exercise Price		Number Exercisable as of 2/1/14		Weighted Average Exercise Price
$0.92	-	$4.98		667,796		6.79	$	5.37		9,373	$	1.12
$5.43	-	$7.86		387,434		6.69	$	6.12		207,888	$	6.19
$7.89	-	$10.59		678,722		4.52	$	9.86		590,823	$	9.76
$10.87	-	$10.87		356,500		4.53	$	10.87		356,400	$	10.87
$11.06	-	$11.06		386,447		2.46	$	11.06		386,447	$	11.06
$11.07	-	$11.09		570,884		5.20	$	11.08		501,325	$	11.08
$11.40	-	$12.02		392,070		3.99	$	11.60		326,062	$	11.56
$12.08	-	$15.91		419,793		3.48	$	14.25		377,627	$	14.23
$16.25	-	$41.58		184,975		3.80	$	32.82		183,708	$	32.93
$45.83	-	$45.83		50,000		3.76	$	45.83		50,000	$	45.83
				4,094,621		4.80	$	11.24		2,989,653	$	12.79

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 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
Granted		-			-
Cancelled/forfeited		(13,175	)		9.50
Vested		(61,758	)		8.49
As of February 1, 2014		88,378		$	8.75	$	773,308

	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
Granted		213,886			4.99
Vested		(210,720	)		6.11
Cancelled/forfeited		(166,921	)		6.26
As of February 1, 2014		468,507		$	5.78	$	2,707,970

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

	Fiscal Years Ended
Stock options	February 1, 2014			February 2, 2013			January 28, 2012
Expected volatility		46.91	%		51.31	%		52.01	%
Risk-free interest rate		1.44	%		0.92	%		1.60	%
Expected term (in years)		5.18			5.87			5.94
Dividend yield		0	%		0	%		0	%
Weighted average fair value at grant date	$	2.36		$	2.77		$	5.27

	Fiscal Years Ended
Employee stock purchase plan	February 1, 2014			February 2, 2013			January 28, 2012
Expected volatility		38.92	%		37.84	%		46.03	%
Risk-free interest rate		0.10	%		0.13	%		0.08	%
Expected term (in years)		0.50			0.49			0.49
Dividend yield		0	%		0	%		0	%
Weighted average fair value at grant date	$	1.27		$	1.47		$	1.85

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

	Fiscal Years Ended
	February 1, 2014		February 2, 2013		January 28, 2012
Cost of revenue	$	267	$	487	$	478
Research and development		3,381		5,740		6,277
Sales and marketing		1,275		1,811		2,137
General and administrative		1,891		2,557		3,133
Total stock-based compensation	$	6,814	$	10,595	$	12,025

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

	Shares Reserved
Stock options outstanding		4,094,621
Authorized for future grants under stock incentive plans		1,978,874
Authorized for future issuance under stock purchase plans		311,156
Restricted stock units outstanding		468,507
Shares reserved for future issuance		6,853,158