5. Equity Compensation Plans (Tables)

6 Months Ended

Oct. 31, 2019

Share-based Payment Arrangement [Abstract]

Schedule of stock option activity

	Stock Options			Grant Date Weighted Average Exercise Price
		(in thousands)
Outstanding at May 1, 2019		3,274		$	7.51
Granted		683		$	5.74
Exercised		(127	)	$	3.42
Canceled or expired		(278	)	$	4.35
Outstanding at October 31, 2019		3,552		$	7.57

Schedule of RSU activity

	Shares			Weighted Average Grant Date Fair Value
		(in thousands)
Outstanding at May 1, 2019		200		$	4.32
Granted		194		$	5.91
Vested		(28	)	$	3.62
Forfeited		(11	)	$	4.48
Outstanding at October 31, 2019		355		$	5.24

Share-based compensation expense

	Three Months Ended October 31,				Six Months Ended October 31,
	2019		2018		2019		2018
Cost of revenues	$	245	$	85	$	431	$	170
Selling, general and administrative		406		240		823		452
Total stock-based compensation	$	651	$	325	$	1,254	$	622