Equity Compensation Plans (Details - Option activity) - Equity Option [Member] shares in Thousands	9 Months Ended
	Jan. 31, 2024 $ / shares shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock options, Outstanding beginning balance | shares	2,079
Grant date weighted average exercise price, Outstanding beginning balance | $ / shares	$ 6.76
Stock options, Granted | shares	0
Grant date weighted average exercise price, Granted | $ / shares	$ 0
Stock options, Exercised | shares	(64)
Grant date weighted average exercise price, Exercised | $ / shares	$ 7.55
Stock options, Cancelled or expired | shares	(21)
Grant date weighted average exercise price, Canceled or expired | $ / shares	$ 11.89
Stock options, Outstanding ending balance | shares	1,994
Grant date weighted average exercise price, Outstanding ending balance | $ / shares	$ 6.68