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Schedule of Impaired Financing Receivables (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unpaid contractual principal	$ 14,763,000	$ 10,800,000	$ 10,641,000
Impaired loan balance	12,462,000	8,680,000	8,691,000
Impaired loans without an allowance	8,473,000	6,524,000	5,994,000
Impaired loans with an allowance	3,989,000	2,156,000	2,697,000
Related allowance recorded	266,000	733,000	310,000
Year-to-date average loan balance	12,948,000	9,104,000	9,745,000
Year-to-date interest income recognized	148,000	584,000	603,000
One To Four Family Residential Real Estate Loans [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unpaid contractual principal	914,000	1,297,000	623,000
Impaired loan balance	914,000	1,256,000	623,000
Impaired loans without an allowance	914,000	887,000	413,000
Impaired loans with an allowance		369,000	210,000
Related allowance recorded		129,000	100,000
Year-to-date average loan balance	925,000	1,291,000	640,000
Year-to-date interest income recognized	3,000	10,000	10,000
Construction and Land Loans [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unpaid contractual principal	2,872,000	3,214,000	3,543,000
Impaired loan balance	1,137,000	1,479,000	1,808,000
Impaired loans without an allowance	1,137,000	1,288,000	1,383,000
Impaired loans with an allowance		191,000	425,000
Related allowance recorded		191,000	103,000
Year-to-date average loan balance	1,211,000	1,631,000	2,689,000
Year-to-date interest income recognized	26,000	36,000	53,000
Commercial Real Estate Loans [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unpaid contractual principal	8,119,000	3,461,000	3,912,000
Impaired loan balance	8,119,000	3,461,000	3,912,000
Impaired loans without an allowance	4,302,000	3,258,000	2,120,000
Impaired loans with an allowance	3,817,000	203,000	1,792,000
Related allowance recorded	177,000	103,000	67,000
Year-to-date average loan balance	8,152,000	3,489,000	3,928,000
Year-to-date interest income recognized	8,000	478,000	487,000
Commercial Loan [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unpaid contractual principal	1,990,000	1,427,000	1,528,000
Impaired loan balance	1,639,000	1,298,000	1,528,000
Impaired loans without an allowance	1,543,000	416,000	1,446,000
Impaired loans with an allowance	96,000	882,000	82,000
Related allowance recorded	22,000	204,000	27,000
Year-to-date average loan balance	1,984,000	1,464,000	1,537,000
Year-to-date interest income recognized	43,000	11,000
Agriculture Loans [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unpaid contractual principal	829,000	1,339,000	932,000
Impaired loan balance	614,000	1,124,000	717,000
Impaired loans without an allowance	538,000	613,000	529,000
Impaired loans with an allowance	76,000	511,000	188,000
Related allowance recorded	67,000	106,000	13,000
Year-to-date average loan balance	618,000	1,166,000	844,000
Year-to-date interest income recognized	67,000	48,000	52,000
Municipal Loans [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unpaid contractual principal	36,000	58,000	58,000
Impaired loan balance	36,000	58,000	58,000
Impaired loans without an allowance	36,000	58,000	58,000
Impaired loans with an allowance
Related allowance recorded
Year-to-date average loan balance	54,000	58,000	58,000
Year-to-date interest income recognized	1,000	1,000	1,000
Consumer Loan [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unpaid contractual principal	3,000	4,000	45,000
Impaired loan balance	3,000	4,000	45,000
Impaired loans without an allowance	3,000	4,000	45,000
Impaired loans with an allowance
Related allowance recorded
Year-to-date average loan balance	4,000	5,000	49,000
Year-to-date interest income recognized

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