Stock-Based Compensation (Tables)

6 Months Ended

Sep. 30, 2017

Stock-Based Compensation

Summary of activity in the plans with respect to stock options

	Number of Shares		Weighted Average Exercise Price Per Share
	(In thousands)
Options outstanding at March 31, 2017	3,776		$	2.76
Granted	150		6.07
Exercised	(289	)	1.96
Forfeited	(31	)	3.98
Expired	—		—
Options outstanding at September 30, 2017	3,606		$	2.95

Summary of activity with respect to RSUs

	Number of Shares
	(In thousands)
RSUs outstanding at March 31, 2017	232
Granted	10
Vested	(15	)
Forfeited	(2	)
RSUs outstanding at September 30, 2017	225

Schedule of stock-based compensation expense

	Three Months Ended				Six Months Ended
	September 30,				September 30,
	2017		2016		2017		2016
	(In thousands)
Cost of revenues	$	16	$	12	$	31	$	22
Selling, general and administrative expense	376		233		768		433
Research and development expense	36		17		78		31
Total stock-based compensation expense	$	428	$	262	$	877	$	486