5. Equity Compensation Plans (Tables)

3 Months Ended

Jul. 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		564		$	5.79
Exercised		(74	)	$	3.50
Canceled or expired		(217	)	$	3.71
Outstanding at July 31, 2019		3,547		$	7.56

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		(27	)	$	3.62
Forfeited		(6	)	$	4.31
Outstanding at July 31, 2019		361		$	5.23

Share-based compensation expense

	Three Months Ended July 31,
	2019		2018
Cost of revenues	$	187	$	85
Selling, general and administrative		416		212
Total stock-based compensation	$	603	$	297