Net Income (Loss) per Common Share (Details - Antidilutive shares) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2023	Jan. 31, 2022
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Dilutive effect of shares on diluted shares outstanding	7,628	6,819	7,520	6,818
Equity Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Dilutive effect of shares on diluted shares outstanding	45	40	49	37
R S Us And P S Us [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Dilutive effect of shares on diluted shares outstanding	807	3	695	5
Convertible Notes [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Dilutive effect of shares on diluted shares outstanding	6,776	6,776	6,776	6,776