Stock-Based Employee Compensation

6 Months Ended

Sep. 30, 2012

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

Stock-Based Employee Compensation

Stock-Based Employee Compensation

Compensation Expense

The following table summarizes stock-based compensation expense by category appearing in the Company’s Consolidated Statement of Operations:

	Three Months Ended					Six Months Ended
(in thousands)	September 30, 2012		October 2, 2011			September 30, 2012		October 2, 2011
Cost of revenue	$	252	$	453		$	555	$	879
Research and development	1,295		2,320			2,838		4,319
Selling, general and administrative	1,336		1,509			2,613		2,856
Discontinued operations	367		(253		)	526		95
Total stock-based compensation expense	$	3,250	$	4,029		$	6,532	$	8,149

Amount of stock-based compensation expense that was capitalized during the periods presented above was immaterial.

During the three and six months ended September 30, 2012, 413,946 and 947,187 shares of common stock were issued under the Company's Employee Stock Purchase Plan and options to purchase 214,965 and 282,626 shares of common stock were exercised under the Company's Stock Incentive Plan, respectively. The number of restricted stock units issued during the three and six months ended September 30, 2012 was 88,406 and 730,214, respectively.

 As of September 30, 2012, the unrecognized compensation cost related to nonvested stock options, net of estimated forfeitures, was $6.7 million and will be recognized over a weighted-average period of 1.4 years.

As of September 30, 2012, the unrecognized compensation cost related to restricted stock units granted under the Company’s equity incentive plans was approximately $7.9 million, net of estimated forfeitures, and is expected to be recognized over a weighted-average period of 1.8 years.