Property and Equipment - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Oct. 31, 2024	Oct. 31, 2023	Oct. 31, 2024	Oct. 31, 2023	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2024
Property, Plant and Equipment [Line Items]
Depreciation and amortization	$ 399,000	$ 484,000	$ 848,000	$ 929,000
Depreciation and amortization, excluding finance leases	362,000	448,000	774,000	857,000
Finance lease, asset, gross	1,000,000.0		1,000,000.0				$ 1,000,000.0
Finance lease, depreciation and amortization	37,000	36,000	74,000	72,000
Amortization of leased assets	$ 37,000	36,000	$ 74,000	72,000
Finance lease, weighted average remaining lease term	2 years 1 month 20 days		2 years 1 month 20 days
2023 Finance Lease
Property, Plant and Equipment [Line Items]
Finance lease costs			$ 368,000		$ 368,000
Present value of minimum future obligations interest rate			3.50%
Amortization of leased assets	$ 18,000	17,600	$ 36,000	35,000
2022 Finance Lease
Property, Plant and Equipment [Line Items]
Finance lease costs			$ 370,000			$ 370,000
Present value of minimum future obligations interest rate			3.25%
Amortization of leased assets	$ 19,000	$ 18,500	$ 38,000	$ 36,900
Capitalized software development costs
Property, Plant and Equipment [Line Items]
Useful lives	3 years		3 years
Minimum
Property, Plant and Equipment [Line Items]
Useful lives	3 years		3 years
Maximum
Property, Plant and Equipment [Line Items]
Useful lives	9 years		9 years