Stock-Based Employee Compensation

9 Months Ended

Dec. 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				Nine Months Ended
(in thousands)	December 30, 2012		January 1, 2012		December 30, 2012		January 1, 2012
Cost of revenue	$	295	$	535	$	850	$	1,415
Research and development	1,531		2,174		4,369		6,493
Selling, general and administrative	948		1,603		3,561		4,458
Discontinued operations	—		113		526		208
Total stock-based compensation expense	$	2,774	$	4,425	$	9,306	$	12,574

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

During the three and nine months ended December 30, 2012, 295,421 and 1,242,608 shares of common stock were issued under the Company's Employee Stock Purchase Plan and options to purchase 586,802 and 869,428 shares of common stock were exercised under the Company's Stock Incentive Plan, respectively. The number of common stock shares related to the restricted stock units issued during the three and nine months ended December 30, 2012 was 49,324 and 779,538, respectively.

As of December 30, 2012, the unrecognized compensation cost related to nonvested stock options, net of estimated forfeitures, was $5.3 million and will be recognized over a weighted-average period of 1.3 years.

As of December 30, 2012, the unrecognized compensation cost related to restricted stock units granted under the Company’s equity incentive plans was approximately $7.1 million, net of estimated forfeitures, and is expected to be recognized over a weighted-average period of 1.6 years.