Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands		Total	Class A Common Shares	Class B Common Shares	Common Stock Class A Common Shares	Common Stock Class B Common Shares	Additional paid-in capital	Retained deficit	Treasury stock
Beginning balance (in shares) at Apr. 30, 2023					36,907,242	1,821,587
Beginning balance at Apr. 30, 2023		$ 138,288			$ 3,691	$ 182	$ 182,722	$ (22,748)	$ (25,559)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock for equity incentive awards (in shares)	[1]				26,253
Issuance of common stock for equity incentive awards	[1]	291			$ 2		289
Stock-based compensation		4,720					4,720
Purchases of common stock		(10,235)							(10,235)
Net earnings (loss)		9,199						9,199
Dividends declared	[1]	(11,169)						(11,169)
Ending balance (in shares) at Jan. 31, 2024					36,933,495	1,821,587
Ending balance at Jan. 31, 2024		131,094			$ 3,693	$ 182	187,731	(24,718)	(35,794)
Beginning balance (in shares) at Oct. 31, 2023					36,929,495	1,821,587
Beginning balance at Oct. 31, 2023		134,450			$ 3,693	$ 182	186,100	(25,152)	(30,373)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock for equity incentive awards (in shares)					4,000
Issuance of common stock for equity incentive awards		45					45
Stock-based compensation		1,586					1,586
Purchases of common stock		(5,421)							(5,421)
Net earnings (loss)		4,088						4,088
Dividends declared	[1]	(3,654)						(3,654)
Ending balance (in shares) at Jan. 31, 2024					36,933,495	1,821,587
Ending balance at Jan. 31, 2024		131,094			$ 3,693	$ 182	187,731	(24,718)	(35,794)
Beginning balance (in shares) at Apr. 30, 2024			36,933,495	1,821,587	36,933,495	1,821,587
Beginning balance at Apr. 30, 2024		130,481			$ 3,693	$ 182	189,330	(26,930)	(35,794)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock for equity incentive awards (in shares)	[1]				104,613
Issuance of common stock for equity incentive awards	[1]	100			$ 11		89
Conversion of B Shares to Common Stock (in shares)					2,185,904	(1,821,587)
Conversion of B shares to common stock		0			$ 219	$ (182)	(37)
Stock-based compensation	[1]	4,808					4,808
Net earnings (loss)		1,033						1,033
Dividends declared	[1]	(11,078)						(11,078)
Ending balance (in shares) at Jan. 31, 2025			39,244,012	0	39,224,012	0
Ending balance at Jan. 31, 2025		125,344			$ 3,923	$ 0	194,190	(36,975)	(35,794)
Beginning balance (in shares) at Oct. 31, 2024					39,215,012	0
Beginning balance at Oct. 31, 2024		130,095			$ 3,922	$ 0	192,479	(30,512)	(35,794)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock for equity incentive awards (in shares)					9,000
Issuance of common stock for equity incentive awards		100			$ 1		99
Stock-based compensation	[1]	1,612					1,612
Purchases of common stock		0
Net earnings (loss)		(2,758)						(2,758)
Dividends declared	[1]	(3,705)						(3,705)
Ending balance (in shares) at Jan. 31, 2025			39,244,012	0	39,224,012	0
Ending balance at Jan. 31, 2025		$ 125,344			$ 3,923	$ 0	$ 194,190	$ (36,975)	$ (35,794)

[1] Amounts adjusted for rounding