Share-based Compensation (Tables)

6 Months Ended

Sep. 30, 2013

Weighted-average assumptions used to value the options granted

We determined the fair value of our option awards using the Black-Scholes option pricing model. We used the following weighted-average assumptions to value the options granted during the six months ended September 30:

	2013			2012

Expected life in years		4.51			5.59
Risk-free interest rate		1.35	%		0.95	%
Expected volatility		89.43	%		91.16	%
Expected dividend yield		0	%		0	%
Weighted-average grant date fair value	$	1.65		$	2.61

Stock option activity

The following table summarizes the activity related to our stock options during the six months ended September 30, 2013:

	Number of shares			Weighted average exercise price		Weighted average remaining life in years		Aggregate intrinsic value

Outstanding at March 31, 2013		2,015,889		$	3.51		2.64	$	598
Options granted		855,125			2.47
Options exercised		(130,132	)		0.88
Options surrendered		(260,199	)		3.76

Outstanding at September 30, 2013		2,480,683		$	3.26		3.91		1,657

Exercisable at September 30, 2013		1,455,279		$	3.69		1.98		859

Restricted shares activity

The following table summarizes the activity related to our restricted shares during the six months ended September 30, 2013:

	Number of Shares			Weighted average grant date fair value		Weighted average remaining life in years		Aggregate intrinsic value
Balance at March 31, 2013		180,085		$	4.39		1.50	$	790
Shares granted		121,750			3.06
Shares vested		(29,197	)		4.71
Shares forfeited		(90,074	)		4.38

Balance at September 30, 2013		182,564			3.45		2.45		630