Federal Income Taxes: Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Sep. 30, 2020
Deferred Tax Assets
Allowance for loan losses	$ 2,613	$ 2,440
Allowance for OREO losses	42	171
OTTI credit impairment on investment securities	64	64
Accrued interest on loans	75	8
Deferred compensation and bonuses	301	372
Reserve for loan commitments	76	81
Operating lease liabilities	495	552
Other	46	69
Total deferred tax assets	3,712	3,757
Deferred Tax Liabilities
Goodwill	1,187	1,187
Loan servicing rights	731	650
Depreciation	787	778
Loan fees/costs	584	428
FHLB stock dividends	38	81
Prepaid expenses	162	98
Purchase accounting adjustment	233	207
Net unrealized gains on investment securities and investments in equity securities	20	23
Operating lease ROU assets	480	543
Total deferred tax liabilities	4,222	3,995
Net deferred tax liabilities	$ (510)	$ (238)