(Loss) Earnings Per Common Share - Basic (Loss) Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2025	Jan. 31, 2024
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Total from continuing operations (in usd per share)	[1]	$ (0.08)	$ 0.12	$ 0.03	$ 0.22
Total from discontinued operations (in usd per share)	[1]	0	0	0	0.05
Total (in usd per share)	[1]	$ (0.08)	$ 0.12	$ (0.08)	$ 0.27
Consideration transferred in excess of Class B shares cost basis pursuant to the Reclassification Agreement		$ (3,800)
Net earnings (loss) attributable to common shareholders		$ (2,758)	$ 4,088	$ (2,723)	$ 9,199
Basic weighted average common shares outstanding (in shares)		33,680	33,292	33,507	33,842
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	$ 0.33	$ 0.33
Undistributed earnings (losses) (in usd per share)		(0.19)	0.01	(0.41)	(0.06)
Total from continuing operations (in usd per share)			0.12		0.22
Total from discontinued operations (in usd per share)			0		0.05
Total (in usd per share)		$ (0.08)	$ 0.12	$ (0.08)	$ 0.27
Distributed earnings		$ 3,708	$ 3,454	$ 10,817	$ 10,568
Undistributed earnings (losses)		(6,466)	410	(9,809)	(1,864)
Total		(2,758)		1,008
Consideration transferred in excess of Class B shares cost basis pursuant to the Reclassification Agreement		0		(3,668)
Total from continuing operations			3,864		6,892
Total from discontinued operations			0		1,812
Net earnings (loss) attributable to common shareholders		$ (2,758)	$ 3,864	$ (2,660)	$ 8,704
Basic weighted average common shares outstanding (in shares)		33,680	31,470	32,721	32,020
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	$ 0.33	$ 0.33
Undistributed earnings (losses) (in usd per share)			0.01	(0.41)	(0.06)
Total from continuing operations (in usd per share)			0.12		0.27
Total from discontinued operations (in usd per share)			0		0
Total (in usd per share)			$ 0.12	$ (0.08)	$ 0.27
Distributed earnings			$ 200	$ 260	$ 601
Undistributed earnings (losses)			24	(235)	(106)
Total				25
Consideration transferred in excess of Class B shares cost basis pursuant to the Reclassification Agreement				(88)
Total from continuing operations			224		495
Total from discontinued operations			0		0
Net earnings (loss) attributable to common shareholders			$ 224	$ (63)	$ 495
Basic weighted average common shares outstanding (in shares)			1,822	786	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 $0.00 and $0.12 for the three months ended January 31, 2025 and 2024, and $(0.08) and $0.27 for the Nine months ended January 31, 2025 and 2024. See Note D to the condensed consolidated financial statements.