Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Non-Interest Income [Abstract]
Net gain on sale of loans held-for-sale(1)	$ 5,143	$ 1,307
Net gain on sale of investments available-for-sale(1)	105	240
Other income	507	468
Total non-interest income	8,872	3,349
Merchant card processing fees	33	9
Recoveries on acquired loans, included in other income	474	459
Loan Fees and Service Charges [Member]
Non-Interest Income [Abstract]
Loan servicing and fee income(1)	2,885	1,207
Service Charges on Deposit Accounts [Member]
Non-Interest Income [Abstract]
Service charges on deposit accounts	$ 232	$ 127