Revenue Recognition - Disaggregated Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 31, 2024	Jan. 31, 2023	Jan. 31, 2024	Jan. 31, 2023
Revenues:
Revenues	$ 25,536	$ 27,427	$ 77,127	$ 81,487
Domestic
Revenues:
Revenues	20,040	21,078	60,646	63,633
International
Revenues:
Revenues	$ 5,496	$ 6,349	$ 16,481	$ 17,854