Stock-Based Compensation- Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2023	Oct. 31, 2022
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock-based compensation expense	$ 1,600	$ 1,300	$ 3,134	$ 2,633
Income tax excess benefit	0	29	$ 0	$ 63
Stock options exercised (in shares)			22,253	97,800
Total intrinsic value of options exercised			$ 40	$ 500
Unrecognized compensation cost related to unvested stock option	16,400		16,400
Unrecognized compensation cost related to RSU awards	16,400		$ 16,400
Weighted average period for unrecognized compensation cost			1 year 9 months 21 days
Discontinued Operations, Disposed of by Sale
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock-based compensation expense	$ 0	$ 8	$ 0	$ 16