Note 14 - Stock-Based Compensation (Tables)

12 Months Ended

Mar. 30, 2014

Note 14 - Stock-Based Compensation (Tables) [Line Items]

Schedule of Share-based Compensation, Employee Stock Purchase Plan, Activity [Table Text Block]

	Shares of Common Stock		Weighted Average Price per Share
Authorized to issue:		4,500	$	—
Reserved for future issuance:
Fiscal year ending March 30, 2014		1,372		—
Fiscal year ending March 31, 2013		1,392		—
Fiscal year ending April 1, 2012		1,418		—
Issued:
Fiscal year ending March 30, 2014		20		11.38
Fiscal year ending March 31, 2013		26		8.38
Fiscal year ending April 1, 2012		62		6.09

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

	Outstanding Options / Quantity			Weighted Average Exercise Price per Share		Weighted Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value (in thousands)		In-the-money Options Vested and Exercisable (in thousands)
Balance at March 27, 2011		5,729,464		$	7.61		4.74	$	147		103
Granted		3,100,595			6.33
Exercised		(422,749	)		6.54
Cancelled		(526,574	)		8.15
Forfeited		(1,535,429	)		6.70
Balance at April 1, 2012		6,345,307		$	7.23		4.67	$	9,474		1,193
Granted		2,540,010			8.32
Exercised		(875,459	)		6.92
Cancelled		(903,781	)		9.67
Forfeited		(893,744	)		6.41
Balance at March 31, 2013		6,212,333		$	7.48		5.04	$	19,199		1,481
Granted		2,482,650			11.89
Exercised		(784,864	)		7.14
Cancelled		(10,834	)		10.92
Forfeited		(685,437	)		8.02
Balance at March 30, 2014		7,213,848		$	8.98		5.02	$	21,301		2,170
Vested and expected to vest, March 30, 2014		6,740,358		$	8.88		4.94	$	20,539
Vested and exercisable, March 30, 2014		2,369,001		$	7.54		3.55	$	10,114

Schedule of Cash Proceeds Received from Share-based Payment Awards [Table Text Block]

	March 30, 2014		March 31, 2013		April 1, 2012
Intrinsic value of options exercised	$	3,887	$	1,443	$	79
Cash received related to option exercises		9,493		6,059		2,763
Tax benefit recorded		6,669		1,927		1,761

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

	Shares			Weighted Average Grant-Date Fair Value		Weighted Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value (in thousands)
Unvested at March 27, 2011		557,098		$	7.17		1.09	$	3,387
Granted		481,650			7.12
Issued and released		(271,830	)		7.25
Forfeited		(162,263	)		7.25
Unvested at April 1, 2012		604,655		$	7.13		2.38	$	5,079
Granted		331,894			8.40
Issued and released		(125,095	)		7.10
Forfeited		(79,250	)		6.96
Unvested at March 31, 2013		732,204		$	7.73		1.72	$	7,688
Granted		828,995			13.06
Issued and released		(346,407	)		9.38
Forfeited		(37,666	)		9.52
Unvested at March 30, 2014		1,177,126		$	10.94		1.62	$	13,784
Vested and expected to vest, March 30, 2014		1,018,609					1.58	$	11,928

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

	March 30, 2014			March 31, 2013			April 1, 2012
Expected term of options (years)		4.40 – 4.49			4.36			4.30
Risk-free interest rate		0.6 – 1.1	%		0.5 – 0.6	%		0.7 – 1.5	%
Expected volatility		32 - 35	%		37 - 42	%		41 - 43	%
Expected dividend yield		—			—			—
Weighted average grant date fair value	$	3.40		$	2.80		$	2.22

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

	March 30, 2014		March 31, 2013		April 1, 2012
Cost of sales	$	714	$	469	$	301
Research and development		1,974		789		1,239
Selling, general and administrative		6,164		3,530		2,210
Total stock-based compensation expense	$	8,852	$	4,788	$	3,750

Schedule of Unrecognized Compensation Cost, Nonvested Awards [Table Text Block]

	March 30, 2014				March 31, 2013				April 1, 2012
	Amount (in thousands)		Weighted Average Remaining Recognition Period (in years)		Amount (in thousands)		Weighted Average Remaining Recognition Period (in years)		Amount (in thousands)		Weighted Average Remaining Recognition Period (in years)
Options	$	9,958		2.7	$	6,269		2.8	$	7,356		2.8
Performance Options		242		2.2		502		2.6		763		3.5
RSUs		5,970		2.2		1,557		2.5		1,185		3.2
PRSUs		3,047		2.5		1,814		3.4		2,352		4.1
Total Stock-based compensation expense	$	19,217			$	10,142			$	11,656

Employee Stock Option [Member]

Note 14 - Stock-Based Compensation (Tables) [Line Items]

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			Number Outstanding As of March 30, 2014		Weighted Average Remaining Contractual Terms (in years)		Weighted Average Exercise Price per Share		Number Exercisable As of March 30, 2014		Weighted Average Exercise Price per Share
$5.44	–	$6.43		2,010,296		4.00	$	6.27		1,184,735	$	6.25
6.60	–	8.07		1,577,634		4.34		7.62		597,423		7.46
8.16	–	10.80		1,764,751		5.45		9.56		387,376		8.90
11.23	–	13.36		1,451,567		6.39		12.22		136,867		12.32
13.54	–	15.67		409,600		6.02		13.59		62,600		13.84
Total				7,213,848		5.02	$	8.98		2,369,001	$	7.54