Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Common Stock Including Additional Paid in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Sep. 30, 2021	7,469,584
Balance at Sep. 30, 2021		$ 19,964	$ 63,298	$ 83,262
Net income		0	1,913	1,913
Dividends paid		0	(1,027)	(1,027)
Shares issued for auto-investments pursuant to the 2021 Dividend Reinvestment and Stock Purchase Plan (in shares)	193
Shares issued for auto-investments pursuant to the 2021 Dividend Reinvestment and Stock Purchase Plan		2	0	2
Shares issued for dividend reinvestment pursuant to the 2021 Dividend Reinvestment and Stock Purchase Plan (in shares)	1,729
Shares issued for dividend reinvestment pursuant to the 2021 Dividend Reinvestment and Stock Purchase Plan		19	0	19
Stock-based compensation		388	0	388
Employee restricted stock forfeiture (in shares)	0
Employee restricted stock forfeiture		(3)		(3)
Balance (in shares) at Dec. 31, 2021	7,478,048
Balance at Dec. 31, 2021		20,339	64,178	84,517
Employee restricted stock vested (in shares)	10,000
Repurchase of vested employee restricted stock for tax withholding (in shares)	(3,458)
Repurchase of vested employee restricted stock for tax withholding		(31)	(6)	(37)
Balance (in shares) at Sep. 30, 2021	7,469,584
Balance at Sep. 30, 2021		19,964	63,298	83,262
Net income				4,816
Balance (in shares) at Jun. 30, 2022	7,482,128
Balance at Jun. 30, 2022		20,954	65,025	85,979
Balance (in shares) at Dec. 31, 2021	7,478,048
Balance at Dec. 31, 2021		20,339	64,178	84,517
Net income		0	1,602	1,602
Dividends paid		0	(1,028)	(1,028)
Shares issued for auto-investments pursuant to the 2021 Dividend Reinvestment and Stock Purchase Plan (in shares)	64
Shares issued for auto-investments pursuant to the 2021 Dividend Reinvestment and Stock Purchase Plan		1	0	1
Shares issued for dividend reinvestment pursuant to the 2021 Dividend Reinvestment and Stock Purchase Plan (in shares)	1,952
Shares issued for dividend reinvestment pursuant to the 2021 Dividend Reinvestment and Stock Purchase Plan		19	0	19
Stock-based compensation		295	0	295
Employee restricted stock forfeiture (in shares)	0
Employee restricted stock forfeiture		(12)	0	(12)
Balance (in shares) at Mar. 31, 2022	7,480,064
Balance at Mar. 31, 2022		20,642	64,752	85,394
Net income		0	1,301	1,301
Dividends paid		0	(1,028)	(1,028)
Shares issued for auto-investments pursuant to the 2021 Dividend Reinvestment and Stock Purchase Plan (in shares)	145
Shares issued for auto-investments pursuant to the 2021 Dividend Reinvestment and Stock Purchase Plan		1	0	1
Shares issued for dividend reinvestment pursuant to the 2021 Dividend Reinvestment and Stock Purchase Plan (in shares)	1,919
Shares issued for dividend reinvestment pursuant to the 2021 Dividend Reinvestment and Stock Purchase Plan		20	0	20
Stock-based compensation		291	0	291
Balance (in shares) at Jun. 30, 2022	7,482,128
Balance at Jun. 30, 2022		20,954	65,025	85,979
Balance (in shares) at Sep. 30, 2022	7,571,741
Balance at Sep. 30, 2022		20,951	65,347	86,298
Net income		0	1,119	1,119
Dividends paid		0	(1,041)	(1,041)
Shares issued for auto-investments pursuant to the 2021 Dividend Reinvestment and Stock Purchase Plan (in shares)	215
Shares issued for auto-investments pursuant to the 2021 Dividend Reinvestment and Stock Purchase Plan		2	0	2
Shares issued for dividend reinvestment pursuant to the 2021 Dividend Reinvestment and Stock Purchase Plan (in shares)	1,750
Shares issued for dividend reinvestment pursuant to the 2021 Dividend Reinvestment and Stock Purchase Plan		15	0	15
Stock-based compensation		262	0	262
Balance (in shares) at Dec. 31, 2022	7,573,706
Balance at Dec. 31, 2022		21,230	65,425	86,655
Balance (in shares) at Sep. 30, 2022	7,571,741
Balance at Sep. 30, 2022		20,951	65,347	86,298
Net income				3,430
Balance (in shares) at Jun. 30, 2023	7,578,432
Balance at Jun. 30, 2023		21,772	65,653	87,425
Balance (in shares) at Dec. 31, 2022	7,573,706
Balance at Dec. 31, 2022		21,230	65,425	86,655
Net income		0	1,195	1,195
Dividends paid		0	(1,041)	(1,041)
Shares issued for auto-investments pursuant to the 2021 Dividend Reinvestment and Stock Purchase Plan (in shares)	199
Shares issued for auto-investments pursuant to the 2021 Dividend Reinvestment and Stock Purchase Plan		2	0	2
Shares issued for dividend reinvestment pursuant to the 2021 Dividend Reinvestment and Stock Purchase Plan (in shares)	1,924
Shares issued for dividend reinvestment pursuant to the 2021 Dividend Reinvestment and Stock Purchase Plan		16	0	16
Stock-based compensation		262	0	262
Balance (in shares) at Mar. 31, 2023	7,575,829
Balance at Mar. 31, 2023		21,510	65,579	87,089
Net income		0	1,116	1,116
Dividends paid		0	(1,042)	(1,042)
Shares issued for auto-investments pursuant to the 2021 Dividend Reinvestment and Stock Purchase Plan (in shares)	402
Shares issued for auto-investments pursuant to the 2021 Dividend Reinvestment and Stock Purchase Plan		3	0	3
Shares issued for dividend reinvestment pursuant to the 2021 Dividend Reinvestment and Stock Purchase Plan (in shares)	2,201
Shares issued for dividend reinvestment pursuant to the 2021 Dividend Reinvestment and Stock Purchase Plan		16	0	16
Stock-based compensation		260	0	260
Employee restricted stock forfeiture (in shares)	0
Employee restricted stock forfeiture		(17)	0	(17)
Balance (in shares) at Jun. 30, 2023	7,578,432
Balance at Jun. 30, 2023		$ 21,772	$ 65,653	$ 87,425