Stock-Based Compensation- Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 31, 2024	Jan. 31, 2023	Jan. 31, 2024	Jan. 31, 2023
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock-based compensation expense	$ 1,600	$ 1,300	$ 4,720	$ 3,919
Income tax benefit (expense)	(69)	4	$ (69)	$ 67
Stock options exercised (in shares)			26,253	140,800
Total intrinsic value of options exercised			$ 40	$ 589
Unrecognized compensation cost related to unvested stock option	14,600		14,600
Unrecognized compensation cost related to RSU awards	14,600		$ 14,600
Weighted average period for unrecognized compensation cost			1 year 8 months 15 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