CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock	Noncontrolling Interests
Common stock, beginning balance (in shares) at Sep. 30, 2022		9,231,725
Beginning balance at Sep. 30, 2022	$ 241,758	$ 92	$ 67,227	$ 173,950	$ 0	$ 489
Treasury stock, beginning balance (in shares) at Sep. 30, 2022					0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common shares for business combination (in share)		200,000
Issuance of common shares for business combination	12,847	$ 2	12,845
Purchase of treasury shares (in shares)					(34,086)
Purchase of treasury shares	(2,223)				$ (2,223)
Canceled treasury shares (in shares)		34,086			34,086
Canceled treasury shares	0		(2,223)		$ 2,223
Payment of dividends	(2,146)			(2,146)
Stock-based compensation	2,588		2,588
Share in return of investment by noncontrolling partner	(600)					(600)
Net income (loss)	29,100			29,246		(146)
Common stock, ending balance (in shares) at Sep. 30, 2023		9,397,639
Ending balance at Sep. 30, 2023	281,324	$ 94	80,437	201,050	$ 0	(257)
Treasury stock, ending balance (in shares) at Sep. 30, 2023					0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Purchase of treasury shares (in shares)					(442,639)
Purchase of treasury shares	(20,606)				$ (20,606)
Canceled treasury shares (in shares)		442,639			442,639
Canceled treasury shares	0	$ (4)	(20,602)		$ 20,606
Excise tax on stock repurchases	(206)		(206)
Payment of dividends	(2,302)			(2,302)
Stock-based compensation	1,882		1,882
Net income (loss)	3,018			3,011		7
Common stock, ending balance (in shares) at Sep. 30, 2024		8,955,000
Ending balance at Sep. 30, 2024	263,110	$ 90	61,511	201,759	$ 0	(250)
Treasury stock, ending balance (in shares) at Sep. 30, 2024					0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Purchase of treasury shares (in shares)					(270,939)
Purchase of treasury shares	(11,860)				$ (11,860)
Canceled treasury shares (in shares)		270,939			270,939
Canceled treasury shares	0	$ (3)	(11,857)		$ 11,860
Excise tax on stock repurchases	(119)		(119)
Payment of dividends	(2,464)			(2,464)
Stock-based compensation	1,373		1,373
Net income (loss)	10,839			10,811		28
Common stock, ending balance (in shares) at Sep. 30, 2025		8,684,061
Ending balance at Sep. 30, 2025	$ 260,879	$ 87	$ 50,908	$ 210,106	$ 0	$ (222)
Treasury stock, ending balance (in shares) at Sep. 30, 2025					0