Stock-Based Compensation And Employee Purchase Plans (Tables)

6 Months Ended

Sep. 30, 2012

Employee Stock Purchase Plan

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

The estimated fair value of stock purchase rights granted under the Employee Stock Purchase Plan was estimated at the date of grant using Black-Scholes pricing model with the following weighted average assumptions:

		Three Months Ended				Six Months Ended
		September 30,				September 30,
		2012		2011		2012		2011
Expected volatility		34%		68%		34%		68%
Expected dividend yield		-		-		-		-
Risk-free interest rate		0.16%		0.10%		0.16%		0.10%
Weighted average expected option term		0.75 years		0.75 years		0.75 years		0.75 years
Weighted average fair value of options granted	$	1.45	$	1.49	$	1.45	$	1.49

Stock Options

Disclosure Of Share-Based Compensation Arrangements By Share-Based Payment Award

Option activity since March 31, 2012 is summarized as follows:

				Weighted
		Shares		Average
	Shares	Subject to		Exercise
	Available	Options		Price
	for Grant	Outstanding		Per Share
Balance at March 31, 2012	375,546	6,034,335	$	1.90
Change in options available for grant	4,100,000	-		-
Granted - options	(890,000)	890,000		5.80
Stock purchase rights/restricted stock units	(369,436)	-		-
Exercised	-	(476,719)		1.40
Canceled/forfeited	68,511	(68,511)		4.42
Termination of plans	(41,051)	-		-
Balance at September 30, 2012	3,243,570	6,379,105	$	2.46

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

The following table summarizes the assumptions used to compute reported stock-based compensation to employees and directors for the three and six months ended September 30, 2012 and 2011:

		Three Months Ended				Six Months Ended
		September 30,				September 30,
		2012		2011		2012		2011
Expected volatility		68%		76%		68%		76%
Expected dividend yield		-		-		-		-
Risk-free interest rate		0.71%		0.31%		0.71%		0.33%
Weighted average expected option term		5.40 years		3.00 years		5.30 years		3.00 years
Weighted average fair value of options granted	$	3.38	$	2.27	$	3.33	$	2.25

Stock Purchase Rights/Restricted Stock Unit

Disclosure Of Share-Based Compensation Arrangements By Share-Based Payment Award

Stock purchase right/restricted stock unit activity since March 31, 2012 is summarized as follows:

			Weighted	Weighted
			Average	Average
			Grant-Date	Remaining
	Number of		Fair Market	Contractual
	Shares		Value	Term (in Years)
Balance at March 31, 2012	966,400	$	2.50	2.61
Granted	369,436		5.56
Released	(182,733)		2.07
Forfeited	(80,244)		2.72
Balance at September 30, 2012	1,072,859	$	3.61	2.74