(Loss) Earnings Per Common Share - Basic (Loss) Earnings Per Common Share (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, Basic, by Common Class, Including Two Class Method [Line Items]
Total from continuing operations (in usd per share)	[1]	$ 0.05	$ 0.02	$ 0.11	$ 0.10
Total from discontinued operations (in usd per share)	[1]	0	0.05	0	0.05
Total (in usd per share)	[1]	$ (0.06)	$ 0.07	$ 0	$ 0.15
Consideration transferred in excess of Class B shares cost basis pursuant to the Reclassification Agreement		$ (3,800)
Net (loss) earnings attributable to common stockholders		$ (2,018)	$ 2,363	$ 35	$ 5,111
Basic weighted average common shares outstanding (in shares)		33,555	34,071	33,420	34,113
Class A Common Shares
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Distributed earnings (in usd per share)		$ 0.11	$ 0.11	$ 0.22	$ 0.22
Undistributed losses (in usd per share)		(0.17)	(0.04)	(0.22)	(0.07)
Total from continuing operations (in usd per share)			0.02		0.10
Total from discontinued operations (in usd per share)			0.05		0.05
Total (in usd per share)		$ (0.06)	$ 0.07	$ 0	$ 0.15
Distributed earnings		$ 3,646	$ 3,556	$ 7,107	$ 7,114
Undistributed (loss)		(1,936)	(1,319)	(3,450)	(2,276)
Total		1,710		3,657
Consideration transferred in excess of Class B shares cost basis pursuant to the Reclassification Agreement		(3,696)		(3,624)
Total from continuing operations			495		2,962
Total from discontinued operations			1,742		1,876
Net (loss) earnings attributable to common stockholders		$ (1,986)	$ 2,237	$ 33	$ 4,838
Basic weighted average common shares outstanding (in shares)		33,021	32,249	32,241	32,291
Class B Common Shares
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Distributed earnings (in usd per share)		$ 0.11	$ 0.11	$ 0.22	$ 0.22
Undistributed losses (in usd per share)		(0.17)	(0.04)	(0.22)	(0.07)
Total from continuing operations (in usd per share)			0.07		0.15
Total from discontinued operations (in usd per share)			0		0
Total (in usd per share)		$ (0.06)	$ 0.07	$ 0	$ 0.15
Distributed earnings		$ 59	$ 201	$ 260	$ 401
Undistributed (loss)		(31)	(75)	(126)	(128)
Total		28		134
Consideration transferred in excess of Class B shares cost basis pursuant to the Reclassification Agreement		(60)		(132)
Total from continuing operations			126		273
Total from discontinued operations			0		0
Net (loss) earnings attributable to common stockholders		$ (32)	$ 126	$ 2	$ 273
Basic weighted average common shares outstanding (in shares)		534	1,822	1,179	1,822

[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.