Revenue Recognition - Disaggregated Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2023	Oct. 31, 2022
Revenues:
Revenues	$ 25,690	$ 27,279	$ 51,591	$ 54,060
Domestic
Revenues:
Revenues	20,058	21,411	40,606	42,555
International
Revenues:
Revenues	$ 5,632	$ 5,868	$ 10,985	$ 11,505