CONDENSED 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, 2020		9,074,569
Beginning balance at Sep. 30, 2020	$ 152,307	$ 91	$ 51,833	$ 100,797	$ 0	$ (414)
Treasury Stock, Beginning balance (in shares) at Sep. 30, 2020					0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Purchase of treasury shares (in shares)					(74,659)
Purchase of treasury shares	(1,794)				$ (1,794)
Canceled treasury shares (in shares)		(74,659)			(74,659)
Canceled treasury shares	0	$ (1)	(1,793)		$ 1,794
Payment of dividends	(360)			(360)
Net income (loss)	9,509			9,643		(134)
Common Stock, Ending balance (in shares) at Dec. 31, 2020		8,999,910
Ending balance at Dec. 31, 2020	159,662	$ 90	50,040	110,080	$ 0	(548)
Treasury Stock, Ending balance (in shares) at Dec. 31, 2020					0
Common Stock, Beginning balance (in shares) at Sep. 30, 2020		9,074,569
Beginning balance at Sep. 30, 2020	152,307	$ 91	51,833	100,797	$ 0	(414)
Treasury Stock, Beginning balance (in shares) at Sep. 30, 2020					0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	27,862
Common Stock, Ending balance (in shares) at Jun. 30, 2021		8,999,910
Ending balance at Jun. 30, 2021	177,295	$ 90	50,040	127,753	$ 0	(588)
Treasury Stock, Ending balance (in shares) at Jun. 30, 2021					0
Common Stock, Beginning balance (in shares) at Dec. 31, 2020		8,999,910
Beginning balance at Dec. 31, 2020	159,662	$ 90	50,040	110,080	$ 0	(548)
Treasury Stock, Beginning balance (in shares) at Dec. 31, 2020					0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Payment of dividends	(360)			(360)
Net income (loss)	6,032			6,091		(59)
Common Stock, Ending balance (in shares) at Mar. 31, 2021		8,999,910
Ending balance at Mar. 31, 2021	165,334	$ 90	50,040	115,811	$ 0	(607)
Treasury Stock, Ending balance (in shares) at Mar. 31, 2021					0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Payment of dividends	(360)			(360)
Net income (loss)	12,321			12,302		19
Common Stock, Ending balance (in shares) at Jun. 30, 2021		8,999,910
Ending balance at Jun. 30, 2021	$ 177,295	$ 90	50,040	127,753	$ 0	(588)
Treasury Stock, Ending balance (in shares) at Jun. 30, 2021					0
Common Stock, Beginning balance (in shares) at Sep. 30, 2021	8,999,910	8,999,910
Beginning balance at Sep. 30, 2021	$ 179,223	$ 90	50,040	129,693	$ 0	(600)
Treasury Stock, Beginning balance (in shares) at Sep. 30, 2021					0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common shares (in shares)		500,000
Issuance of common shares	30,362	$ 5	30,357
Payment of dividends	(380)			(380)
Net income (loss)	10,564			10,575		(11)
Common Stock, Ending balance (in shares) at Dec. 31, 2021		9,499,910
Ending balance at Dec. 31, 2021	$ 219,769	$ 95	80,397	139,888	$ 0	(611)
Treasury Stock, Ending balance (in shares) at Dec. 31, 2021					0
Common Stock, Beginning balance (in shares) at Sep. 30, 2021	8,999,910	8,999,910
Beginning balance at Sep. 30, 2021	$ 179,223	$ 90	50,040	129,693	$ 0	(600)
Treasury Stock, Beginning balance (in shares) at Sep. 30, 2021					0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 35,479
Common Stock, Ending balance (in shares) at Jun. 30, 2022	9,286,198	9,286,198
Ending balance at Jun. 30, 2022	$ 231,685	$ 93	68,342	163,800	$ 0	(550)
Treasury Stock, Ending balance (in shares) at Jun. 30, 2022					0
Common Stock, Beginning balance (in shares) at Dec. 31, 2021		9,499,910
Beginning balance at Dec. 31, 2021	219,769	$ 95	80,397	139,888	$ 0	(611)
Treasury Stock, Beginning balance (in shares) at Dec. 31, 2021					0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Purchase of treasury shares (in shares)					(45,643)
Purchase of treasury shares	(2,845)				$ (2,845)
Canceled treasury shares (in shares)		(45,643)			(45,643)
Canceled treasury shares	0	$ (1)	(2,844)		$ 2,845
Payment of dividends	(474)			(474)
Net income (loss)	10,973			10,952		21
Common Stock, Ending balance (in shares) at Mar. 31, 2022		9,454,267
Ending balance at Mar. 31, 2022	227,423	$ 94	77,553	150,366	$ 0	(590)
Treasury Stock, Ending balance (in shares) at Mar. 31, 2022					0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Purchase of treasury shares (in shares)					(168,069)
Purchase of treasury shares	(9,212)				$ (9,212)
Canceled treasury shares (in shares)		(168,069)			(168,069)
Canceled treasury shares	0	$ (1)	(9,211)		$ 9,212
Payment of dividends	(468)			(468)
Net income (loss)	$ 13,942			13,902		40
Common Stock, Ending balance (in shares) at Jun. 30, 2022	9,286,198	9,286,198
Ending balance at Jun. 30, 2022	$ 231,685	$ 93	$ 68,342	$ 163,800	$ 0	$ (550)
Treasury Stock, Ending balance (in shares) at Jun. 30, 2022					0