Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) $ in Thousands	Jan. 31, 2025 USD ($) $ / shares shares	Apr. 30, 2024 USD ($) $ / shares shares
Allowance for doubtful accounts receivable | $	$ 127	$ 143
Property and equipment, accumulated depreciation | $	30,969	30,022
Other intangibles, accumulated amortization | $	$ 19,187	$ 16,639
Share conversion ratio	1.2	1.2
Class A treasury stock shares (in shares)	5,534,953	5,534,953
Class A Common Shares
Common stock, par value (in usd per share) | $ / shares	$ 0.10	$ 0.10
Common stock, shares authorized (in shares)	50,000,000	50,000,000
Common stock, shares issued (in shares)	39,244,012	36,933,495
Common stock, shares outstanding (in shares)	39,244,012	36,933,495
Class B Common Shares
Common stock, par value (in usd per share) | $ / shares	$ 0.10	$ 0.10
Common stock, shares authorized (in shares)	0	10,000,000
Common stock, shares issued (in shares)	0	1,821,587
Common stock, shares outstanding (in shares)	0	1,821,587