Revenue Recognition - Disaggregated Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2022	Oct. 31, 2021	Oct. 31, 2022	Oct. 31, 2021
Revenues:
Revenues	$ 31,438	$ 31,211	$ 62,734	$ 60,482
Domestic
Revenues:
Revenues	25,570	26,197	51,229	50,624
International
Revenues:
Revenues	$ 5,868	$ 5,014	$ 11,505	$ 9,858