Property and Equipment - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2025	Jan. 31, 2024	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2024
Property, Plant and Equipment [Line Items]
Depreciation and amortization	$ 398,000	$ 481,000	$ 1,200,000	$ 1,400,000
Depreciation and amortization, excluding finance leases	360,000	445,000	1,100,000	1,300,000
Finance lease, asset, gross	1,000,000.0		1,000,000.0				$ 1,000,000.0
Finance lease, depreciation and amortization	38,000	36,000	112,000	108,000
Amortization of leased assets	$ 38,000	36,000	$ 112,000	108,000
Finance lease, weighted average remaining lease term	1 year 11 months 4 days		1 year 11 months 4 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	$ 18,400	17,800	$ 55,000	52,800
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	$ 19,300	$ 18,700	$ 57,000	$ 55,600
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