STOCK-BASED COMPENSATION (Tables)

9 Months Ended

Dec. 30, 2012

Summary of ESPP Transactions

The following table summarizes our ESPP transactions during the fiscal periods presented (in thousands, except per share amounts):

	As of December 30, 2012		Nine Months Ended December 30, 2012
	Shares of Common Stock		Shares of Common Stock		Weighted Average Price per Share
Reserved for future issuance		1,405
Issued				13	$	7.61

Stock Option Transactions

Our stock option transactions during the nine months ended December 30, 2012 are summarized as follows:

	Outstanding			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 April 1, 2012		6,345,307		$	7.23		4.67	$	9,474		1,193
Granted		2,072,210			8.04
Exercised		(669,120	)		6.86
Cancelled		(901,981	)		9.68
Forfeited		(783,305	)		6.36
Balance at December 30, 2012		6,063,111		$	7.30		5.31	$	9,073		1,327
Vested and expected to vest, December 30, 2012		5,139,805		$	7.28		5.14	$	7,872
Vested and exercisable, December 30, 2012		1,538,729		$	7.66		3.22	$	2,302

Intrinsic Value of Options Exercised

Intrinsic value of options exercised for the periods indicated below were as follows (in thousands):

	Three Months Ended				Nine Months Ended
	December 30, 2012		January 1, 2012		December 30, 2012		January 1, 2012
Intrinsic value of options exercised	$	304	$	26	$	879	$	33

RSU Transactions

Our RSU transactions during the nine months ended December 30, 2012 are summarized as follows:

	Shares			Weighted Average Grant- Date Fair Value		Weighted Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value (in  thousands)
Unvested at April 1, 2012		604,655		$	7.13		2.38	$	5,079
Granted		274,294			8.21
Issued and released		(107,494	)		7.08
Forfeited		(79,250	)		6.96
Unvested at December 30, 2012		692,205		$	7.58		1.88	$	5,994
Vested and expected to vest, December 30, 2012,		534,358					1.75	$	4,628

Stock-Based Compensation Expense

The following table summarizes stock-based compensation expense related to stock options and RSUs during the fiscal periods presented (in thousands):

	Three Months Ended				Nine Months Ended
	December 30, 2012		January 1, 2012		December 30, 2012		January 1, 2012
Cost of sales	$	175	$	104	$	289	$	232
Research and development		328		576		437		1,366
Selling, general and administrative		986		653		2,284		1,796
Total Stock-based compensation expense	$	1,489	$	1,333	$	3,010	$	3,394

Unrecognized Stock-Based Compensation Expense

The following table summarizes unrecognized stock-based compensation expense related to stock options and RSUs for the periods indicated below as follows:

	December 30, 2012				April 1, 2012
	Amount (in  thousands)		Weighted Average Remaining Recognition Period (in years)		Amount (in  thousands)		Weighted Average Remaining Recognition Period (in years)
Options	$	6,990		2.9	$	8,119		2.8
RSUs		3,373		2.7		3,537		3.2
Total Stock-based compensation expense	$	10,363			$	11,656

Weighted Average Assumptions to Calculate Fair Values of Options Granted

We used the following weighted average assumptions to calculate the fair values of options granted during the fiscal periods presented:

	Three Months Ended						Nine Months Ended
	December 30, 2012			January 1, 2012			December 30, 2012			January 1, 2012
Expected term of options (years)		4.4			4.3			4.2 – 4.5			4.3
Risk-free interest rate		0.5	%		0.8	%		0.5% – 0.6	%		0.8% – 1.5	%
Expected volatility		41	%		43	%		41% – 42	%		41% – 43	%
Expected dividend yield		—			—			—			—
Weighted average grant date fair value	$	2.81		$	2.07		$	2.76		$	2.12