Share-Based Payments - Narrative (Details) - USD ($)		3 Months Ended		9 Months Ended
	Feb. 18, 2011	Jan. 31, 2024	Jan. 31, 2023	Jan. 31, 2024	Jan. 31, 2023	Mar. 29, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average grant date fair value (in dollars per share)		$ 3.41	$ 4.20	$ 3.77	$ 4.33
Share repurchase program, authorized amount						$ 5,000,000
Treasury stock (in shares)				120,300
Treasury stock average price (in dollars per share)				$ 5.73
Treasury stock approximate value				$ 708,000
Remaining repurchase amount		$ 4,300,000		$ 4,300,000
Equity Incentive Plan 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant (in shares)		1,300,000		1,300,000
Expiration term of awards				10 years
strike price as percent of market value				100.00%
Equity Incentive Plan 2021 | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant (in shares)		2,000,000		2,000,000
Equity Incentive Plan 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration term of awards				10 years
strike price as percent of market value				100.00%
Equity Incentive Plan 2010 | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted, net of forfeitures (in shares)	30,000,000