Net Income (Loss) per Common Share (Details - Reconciliation of per share) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2023	Jan. 31, 2022
Numerator
Net income	$ 461	$ 2,248	$ 869	$ 12,074
Denominator
Weighted average basic common shares outstanding	62,388	61,631	62,166	61,394
Effect of dilutive securities:
Stock options	1,129	1,862	1,239	1,926
RSUs, PSUs and ESPP	209	379	229	391
Weighted average dilutive common shares outstanding	63,726	63,872	63,634	63,711
Net income per share:
Basic	$ 0.01	$ 0.04	$ 0.01	$ 0.20
Diluted	$ 0.01	$ 0.04	$ 0.01	$ 0.19