Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) $ in Thousands	9 Months Ended	12 Months Ended
	Jan. 31, 2022 USD ($) $ / shares shares	Apr. 30, 2021 USD ($) $ / shares shares
Allowance for doubtful accounts receivable | $	$ 443	$ 430
Property and equipment, accumulated depreciation | $	31,040	30,581
Capitalized software, accumulated amortization | $	41,293	38,826
Other intangibles, accumulated amortization | $	$ 13,175	$ 13,015
Share conversion ratio	1	1
Class A Common Shares
Common stock, par value (in usd per share) | $ / shares	$ 0.10	$ 0.10
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	36,307,695	35,629,566
Common stock, shares outstanding	36,307,695	35,629,566
Common stock, shares outstanding, net	31,719,063	31,040,934
Common stock, shares issued, net	31,719,063	31,040,934
Class A treasury stock (in shares)	4,588,632	4,588,632
Class B Common Shares
Common stock, par value (in usd per share) | $ / shares	$ 0.10	$ 0.10
Common stock, shares authorized	10,000,000	10,000,000
Common stock, shares issued	1,821,587	1,821,587
Common stock, shares outstanding	1,821,587	1,821,587