Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock Outstanding [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Sep. 30, 2020	22,546,765
Balance at Sep. 30, 2020	$ 23	$ 56,752	$ 116,291	$ 173,066
Net income	0	0	3,632	3,632
Cash dividends	$ 0	0	(46,706)	(46,706)
Issuance of common stock (in shares)	16,884
Issuance of common stock	$ 0	0	0	0
Share-based compensation	$ 0	166	0	166
Balance (in shares) at Dec. 31, 2020	22,563,649
Balance at Dec. 31, 2020	$ 23	56,918	73,217	130,158
Balance (in shares) at Sep. 30, 2020	22,546,765
Balance at Sep. 30, 2020	$ 23	56,752	116,291	173,066
Net income				8,336
Balance (in shares) at Mar. 31, 2021	22,595,467
Balance at Mar. 31, 2021	$ 23	57,065	76,339	133,427
Balance (in shares) at Dec. 31, 2020	22,563,649
Balance at Dec. 31, 2020	$ 23	56,918	73,217	130,158
Net income	0	0	4,704	4,704
Cash dividends	$ 0	0	(1,582)	(1,582)
Issuance of common stock (in shares)	31,818
Issuance of common stock	$ 0	0	0	0
Share-based compensation	$ 0	147	0	147
Balance (in shares) at Mar. 31, 2021	22,595,467
Balance at Mar. 31, 2021	$ 23	57,065	76,339	133,427
Balance (in shares) at Sep. 30, 2021	22,620,417
Balance at Sep. 30, 2021	$ 23	57,289	85,419	142,731
Net income	0	0	8,915	8,915
Cash dividends	$ 0	0	(2,263)	(2,263)
Issuance of common stock (in shares)	23,473
Issuance of common stock	$ 0	0	0	0
Share-based compensation (in shares)	0
Share-based compensation	$ 0	171	0	171
Balance (in shares) at Dec. 31, 2021	22,643,890
Balance at Dec. 31, 2021	$ 23	57,460	92,071	149,554
Balance (in shares) at Sep. 30, 2021	22,620,417
Balance at Sep. 30, 2021	$ 23	57,289	85,419	142,731
Net income				15,272
Balance (in shares) at Mar. 31, 2022	22,669,038
Balance at Mar. 31, 2022	$ 23	57,661	96,161	153,845
Balance (in shares) at Dec. 31, 2021	22,643,890
Balance at Dec. 31, 2021	$ 23	57,460	92,071	149,554
Net income	0	0	6,357	6,357
Cash dividends	$ 0	0	(2,267)	(2,267)
Issuance of common stock (in shares)	25,148
Issuance of common stock	$ 0	0	0	0
Share-based compensation (in shares)	0
Share-based compensation	$ 0	201	0	201
Balance (in shares) at Mar. 31, 2022	22,669,038
Balance at Mar. 31, 2022	$ 23	$ 57,661	$ 96,161	$ 153,845