Employee Benefit Plans (Tables)

12 Months Ended

Mar. 31, 2017

Employee Benefit Plans

Summary of activity in the plans with respect to stock options

	Options			Weighted Average Exercise Price Per Share		Weighted Average Remaining Contractual Life		Aggregate Intrinsic Value
	(In thousands)					(Years)		(In thousands)
Options outstanding at March 31, 2016		3,309		$	2.07
Granted		905			4.81
Exercised		(388	)		1.72
Forfeited		(37	)		2.25
Expired		(13	)		2.06
Options outstanding at March 31, 2017		3,776		$	2.76		8.0	$	10,115
Options exercisable at March 31, 2017		1,396		$	1.99		6.4	$	4,822
Vested and expected to vest at March 31, 2017		3,406		$	2.66		7.8	$	9,483
Options exercisable at March 31, 2017 pursuant to a change-in-control		3,776		$	2.76		8.0	$	10,115

Summary of activity with respect to RSUs

	# of Shares			Weighted Average Price Per Share		Weighted Average Remaining Life		Aggregate Intrinsic Value
	(In thousands)					(Years)		(In thousands)
RSUs outstanding at March 31, 2016		173		$	2.00
Granted		141			4.98
Vested		(68	)		1.93
Forfeited		(14	)		2.05
RSUs outstanding at March 31, 2017		232		$	3.84		1.8	$	477
Expected to vest at March 31, 2017		180		$	3.83		1.7	$	377
Common stock issuable (for RSUs) at March 31, 2017 upon a change-in-control		232		$	3.84		1.8	$	477

Schedule of stock-based compensation expense

	Year Ended March 31,
	2017		2016		2015
	(In thousands)
Cost of revenues	$	51	$	42	$	21
Selling, general and administrative expense		858		567		315
Research and development expense		67		50		62
Total stock-based compensation	$	976	$	659	$	398

Schedule of weighted-average assumptions used in estimating the grant date fair value of stock options granted

	Year Ended March 31,
	2017			2016			2015
Expected life—years		6.5			7.2			7.7
Risk-free interest rate		2.2	%		1.9	%		2.0	%
Expected volatility of common stock		40	%		47	%		50	%
Dividend yield		—	%		—	%		—	%

Summary of certain fair value and intrinsic value information pertaining to stock options

	Year Ended March 31,
	2017		2016		2015
	(In thousands, except per share amounts)
Weighted average grant date fair value per share of options granted	$	2.11	$	1.19	$	1.01
Intrinsic value of options exercised	$	1,061	$	135	$	9