Parent Company Only Condensed Financial Information - Balance Sheets (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
ASSETS [Abstract]
Cash and due from banks	$ 9,934	$ 8,302
Other assets	3,565	3,957
TOTAL ASSETS	1,840,058	1,484,641
LIABILITIES AND STOCKHOLDERS' EQUITY [Abstract]
Subordinated debentures	24,568	24,513
Accrued interest payable	915	1,290
TOTAL LIABILITIES	1,667,474	1,362,112
TOTAL STOCKHOLDERS' EQUITY	172,584	122,529	$ 78,043
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	1,840,058	1,484,641
Parent Company [Member]
ASSETS [Abstract]
Cash and due from banks	304	571
Investment in Bank	197,290	146,232
Other assets	141	1,050
TOTAL ASSETS	197,735	147,853
LIABILITIES AND STOCKHOLDERS' EQUITY [Abstract]
Subordinated debentures	24,568	24,513
Accrued interest payable	573	576
Accrued expenses and other liabilities	10	235
TOTAL LIABILITIES	25,151	25,324
TOTAL STOCKHOLDERS' EQUITY	172,584	122,529
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 197,735	$ 147,853