(Loss) Earnings Per Common Share - Diluted Earnings per Share for Class B Common Shares Using Two-Class Method (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Oct. 31, 2024	Oct. 31, 2023	Oct. 31, 2024	Oct. 31, 2023
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Undistributed and distributed earnings		$ (2,018)	$ 2,363	$ 35	$ 5,111
Basic weighted average common shares outstanding (in shares)		33,555	34,071	33,420	34,113
Diluted EPS for class B common shares (in shares)		33,571	34,094	33,439	34,127
Basic EPS (in usd per share)	[1]	$ (0.06)	$ 0.07	$ 0	$ 0.15
Class B Common Shares
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Undistributed and distributed earnings		$ (32)	$ 126	$ 2	$ 273
Reallocation of undistributed earnings/losses from Class A Common Shares to Class B Common Shares		0	1	0	0
Diluted EPS, Net earnings		$ (32)	$ 127	$ 2	$ 273
Basic weighted average common shares outstanding (in shares)		534	1,822	1,179	1,822
Diluted EPS for class B common shares (in shares)		534	1,822	1,179	1,822
Basic EPS (in usd per share)		$ (0.06)	$ 0.07	$ 0	$ 0.15
Diluted EPS (in usd per share)		$ (0.06)	$ 0.07	$ 0.00	$ 0.15

[1] Basic per share amounts are the same for Class A and Class B shares. Diluted per share amounts for Common Stock is shown above. Diluted earnings per share for Class B shares under the two-class method are $(0.06) and $0.07 for the three months ended October 31, 2024 and 2023, and $0.00 and $0.15 for the six months ended October 31, 2024 and 2023. See Note D to the condensed consolidated financial statements.