Fair Value: Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments available-for-sale	$ 210,826	$ 168,948
Investments held-to-maturity	2,432	2,432
FHLB stock	5,512	5,465
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash on hand and in banks	9,458	7,246
Interest-earning deposits with banks	26,194	66,145
Investments available-for-sale	45,600	3,767
Investments held-to-maturity	0	0
Loans receivable, net	0	0
FHLB stock	0	0
Accrued interest receivable	0	0
Derivative fair value asset	0	0
Deposits	855,326	863,347
Certificates of deposit, retail	0	0
Brokered deposits	0
Advances from the FHLB	0	0
Accrued interest payable	0	0
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash on hand and in banks	0	0
Interest-earning deposits with banks	0	0
Investments available-for-sale	165,226	165,181
Investments held-to-maturity	2,432	2,432
Loans receivable, net	0	0
FHLB stock	5,512	5,465
Accrued interest receivable	5,738	5,285
Derivative fair value asset	7,878	1,491
Deposits	0	0
Certificates of deposit, retail	265,299	295,929
Brokered deposits	53,222
Advances from the FHLB	94,992	95,003
Accrued interest payable	115	112
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash on hand and in banks	0	0
Interest-earning deposits with banks	0	0
Investments available-for-sale	0	0
Investments held-to-maturity	0	0
Loans receivable, net	1,108,057	1,109,887
FHLB stock	0	0
Accrued interest receivable	0	0
Derivative fair value asset	0	0
Deposits	0	0
Certificates of deposit, retail	0	0
Brokered deposits	0
Advances from the FHLB	0	0
Accrued interest payable	0	0
Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash on hand and in banks	9,458	7,246
Interest-earning deposits with banks	26,194	66,145
Investments available-for-sale	210,826	168,948
Investments held-to-maturity	2,432	2,432
Loans receivable, net	1,119,795	1,103,461
FHLB stock	5,512	5,465
Accrued interest receivable	5,738	5,285
Derivative fair value asset	7,878	1,491
Deposits	855,326	863,347
Certificates of deposit, retail	270,866	294,127
Brokered deposits	53,277
Advances from the FHLB	95,000	95,000
Accrued interest payable	115	112
Estimated Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash on hand and in banks	9,458	7,246
Interest-earning deposits with banks	26,194	66,145
Investments available-for-sale	210,826	168,948
Investments held-to-maturity	2,432	2,432
Loans receivable, net	1,108,057	1,109,887
FHLB stock	5,512	5,465
Accrued interest receivable	5,738	5,285
Derivative fair value asset	7,878	1,491
Deposits	855,326	863,347
Certificates of deposit, retail	265,299	295,929
Brokered deposits	53,222
Advances from the FHLB	94,992	95,003
Accrued interest payable	$ 115	$ 112