Net Income (Loss) Per Common Share (Details - Reconcilation of per share) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2020
Numerator
Net income (loss)	$ 127,672	$ 11,212	$ (10,466)
Series E preferred stock accumulated dividends	0	(4,455)	(4,686)
Impact of Series E preferred stock redemption	0	(3,439)	0
Net income (loss) attributable to common stockholders, basic	127,672	3,318	(15,152)
Add interest expense on Convertible Notes, net of tax	1,954	0	0
Net income (loss) attributable to common stockholders, diluted	$ 129,626	$ 3,318	$ (15,152)
Denominator
Weighted average basic common shares outstanding	61,484	58,222	56,326
Effect of dilutive securities:
Stock options	1,830	909	0
RSUs, PSUs and ESPP	384	295	0
Convertible Notes	6,776	0	0
Weighted average dilutive common shares outstanding	70,474	59,426	56,326
Net income (loss) per share attributable to common stockholders:
Basic	$ 2.08	$ 0.06	$ (0.27)
Diluted	$ 1.84	$ 0.06	$ (0.27)