Parent Company Only Condensed Financial Information, Balance Sheets (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019
ASSETS [Abstract]
Cash and deposits due from banks	$ 8,302	$ 6,239
Other assets	3,957	3,758
TOTAL ASSETS	1,484,641	851,606
LIABILITIES AND STOCKHOLDERS' EQUITY [Abstract]
Note payable	0	14,984
Subordinated debentures	24,513	0
Accrued interest payable	1,290	374
TOTAL LIABILITIES	1,362,112	773,563
Total Stockholders' equity	122,529	78,043	$ 71,950
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	1,484,641	851,606
Parent Company [Member]
ASSETS [Abstract]
Cash and deposits due from banks	571	514
Investment in bank	146,232	91,792
Other assets	1,050	755
TOTAL ASSETS	147,853	93,061
LIABILITIES AND STOCKHOLDERS' EQUITY [Abstract]
Note payable	0	14,984
Subordinated debentures	24,513	0
Accrued interest payable	576	34
Accrued expenses and other liabilities	235	0
TOTAL LIABILITIES	25,324	15,018
Total Stockholders' equity	122,529	78,043
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 147,853	$ 93,061