Stock Plans (Tables)

12 Months Ended

Mar. 31, 2012

Summary Of Share-Based Compensation Expense


	Year Ended March 31,
	2012		2011		2010
Cost of product revenue	$	192	$	134	$	129
Cost of service revenue		227		218		237
Research and development		2,486		1,651		1,364
Sales and marketing		3,052		2,527		2,299
General and administrative		2,745		1,909		1,427

	$	8,702	$	6,439	$	5,456

Summary Of Transactions Under 1999 Stock Option Plan And 2007 Equity Incentive Plan

Transactions under the 1999 Stock Option Plan and the 2007 Equity Incentive Plan during the fiscal year ended March 31, 2012 are summarized as follows:


	Stock Options				Restricted Stock Units
	Number of Shares		Weighted Average Exercise Price		Number of Awards		Weighted Average Fair Value
Outstanding – March 31, 2011		325,519		6.35		1,418,859		12.35
Granted		0		0		1,071,131		13.36
Exercised (Options)/Issued (RSU's)		84,502		5.58		659,350		11.26
Canceled		125		5.26		75,315		13.60

Outstanding – March 31, 2012		240,892	$	6.63		1,755,325	$	13.33

Transactions under the 1999 Stock Option Plan and the 2007 Equity Incentive Plan during the fiscal years ended March 31, 2011 and 2010 are summarized as follows:


	Year Ended March 31,
	2011		2010
Stock options:
Granted	$	0	$	0
Weighted average grant-date fair value	$	0	$	0
Restricted stock units:
Granted		928,596		120,279
Weighted average grant-date fair value	$	13.67	$	11.19

Schedule Of Aggregate Intrinsic Values Of Stock Options And Restricted Stock Units


	Year Ended March 31,
	2012		2011		2010
Options:
Outstanding (1)	$	3,303	$	6,825	$	6,084
Exercisable (1)	$	3,303	$	6,825	$	6,084
Restricted Stock Units (2)	$	35,645	$	38,763	$	16,452

(1)	The aggregate intrinsic values in this table were calculated based on the positive difference between the closing market value of the Company's common stock on March 30, 2012 ($20.34), 2011 ($27.32) and 2010 ($14.79) and the exercise price of the underlying options.

(2)	The aggregate intrinsic values in this table were calculated based on the closing market value of the Company's common stock on March 30, 2012 ($20.34), 2011 ($27.32) and 2010 ($14.79) for the underlying restricted stock units.