Condensed Consolidated Statements of Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock	Non- Controlling Interest
Beginning balance (in shares) at Apr. 30, 2023		13,701,468
Beginning balance at Apr. 30, 2023	$ 498,547	$ 137	$ 109,929	$ 685,802	$ (297,421)	$ 100
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (in shares)		2,921
Issuance of common stock	78		78
Stock options exercised (in shares)		6,493
Stock options exercised	(455)		(455)
Purchase of treasury shares	(68)				(68)
Stock based compensation	2,451		2,451
Dividends on subsidiary preferred stock	(10)			(10)
Net income (loss)	4,186			4,186
Ending balance (in shares) at Jul. 31, 2023		13,710,882
Ending balance at Jul. 31, 2023	504,729	$ 137	112,003	689,978	(297,489)	100
Beginning balance (in shares) at Apr. 30, 2023		13,701,468
Beginning balance at Apr. 30, 2023	498,547	$ 137	109,929	685,802	(297,421)	100
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(31,819)
Ending balance (in shares) at Jan. 31, 2024		13,722,938
Ending balance at Jan. 31, 2024	469,007	$ 137	112,574	653,953	(297,757)	100
Beginning balance (in shares) at Jul. 31, 2023		13,710,882
Beginning balance at Jul. 31, 2023	504,729	$ 137	112,003	689,978	(297,489)	100
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (in shares)		849
Issuance of common stock	65		65
Stock based compensation	(712)		(712)
Dividends on subsidiary preferred stock	(10)			(10)
Net income (loss)	(27,463)			(27,463)
Ending balance (in shares) at Oct. 31, 2023		13,711,731
Ending balance at Oct. 31, 2023	476,609	$ 137	111,356	662,505	(297,489)	100
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (in shares)		11,207
Issuance of common stock	75		75
Purchase of treasury shares	(268)				(268)
Stock based compensation	1,143		1,143
Dividends on subsidiary preferred stock	(10)			(10)
Net income (loss)	(8,542)			(8,542)
Ending balance (in shares) at Jan. 31, 2024		13,722,938
Ending balance at Jan. 31, 2024	469,007	$ 137	112,574	653,953	(297,757)	100
Beginning balance (in shares) at Mar. 31, 2024		13,727,013
Beginning balance at Mar. 31, 2024	470,750	$ 137	113,930	654,369	(297,786)	100
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (in shares)		2,491
Issuance of common stock	76		76
Purchase of treasury shares	(24)				(24)
Stock based compensation	1,325		1,325
Dividends on subsidiary preferred stock	(10)			(10)
Net income (loss)	(964)			(964)
Ending balance (in shares) at Jul. 31, 2024		13,729,504
Ending balance at Jul. 31, 2024	$ 471,153	$ 137	115,331	653,395	(297,810)	100
Beginning balance (in shares) at Apr. 30, 2024	13,727,013
Beginning balance at Apr. 30, 2024	$ 470,750
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 7,297
Ending balance (in shares) at Jan. 31, 2025	15,599,303	15,599,303
Ending balance at Jan. 31, 2025	$ 557,911	$ 156	194,237	661,636	(298,218)	100
Beginning balance (in shares) at Jul. 31, 2024		13,729,504
Beginning balance at Jul. 31, 2024	471,153	$ 137	115,331	653,395	(297,810)	100
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (in shares)		1,865,769
Issuance of common stock	73,893	$ 19	73,874
Purchase of treasury shares	(388)				(388)
Stock issued related to acquisitions	2,500		2,500
Stock based compensation	1,418		1,418
Dividends on subsidiary preferred stock	(10)			(10)
Net income (loss)	5,099			5,099
Ending balance (in shares) at Oct. 31, 2024		15,595,273
Ending balance at Oct. 31, 2024	553,665	$ 156	193,123	658,484	(298,198)	100
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (in shares)		4,030
Issuance of common stock	72		72
Purchase of treasury shares	(20)				(20)
Stock based compensation	1,042		1,042
Dividends on subsidiary preferred stock	(10)			(10)
Net income (loss)	$ 3,162			3,162
Ending balance (in shares) at Jan. 31, 2025	15,599,303	15,599,303
Ending balance at Jan. 31, 2025	$ 557,911	$ 156	$ 194,237	$ 661,636	$ (298,218)	$ 100