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Loans and Allowance for Loan Losses - Schedule of Past Due Financing Receivables (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Loans, Total past due loans accruing	$ 3,437	$ 1,671
Loans, Non-accrual loans	5,546	5,236
Loan, Total past due and non-accrual loans	8,983	6,907
Loan, Total loans not past due	$ 529,409	$ 488,340
Percentage of gross loans, Total past due loans accruing	0.64%	0.34%
Percent of gross loans, Non-accrual loans	1.03%	1.06%
Percentage of Total past due and non-accrual loans	1.67%	1.40%
Percentage of Total loans not past due	98.33%	98.60%
30-59 Days Delinquent and Accruing [Member]
Loans, Total past due loans accruing	$ 2,069	$ 1,200
Percentage of gross loans, Total past due loans accruing	0.39%	0.24%
60-89 Days Delinquent and Accruing [Member]
Loans, Total past due loans accruing	$ 1,368	$ 471
Percentage of gross loans, Total past due loans accruing	0.25%	0.10%
90 Days or More Delinquent and Accruing [Member]
Loans, Total past due loans accruing
Percentage of gross loans, Total past due loans accruing	0.00%	0.00%
One-to-Four Family Residential Real Estate Loans [Member]
Loans, Total past due loans accruing	$ 672	$ 337
Loans, Non-accrual loans	1,088	442
Loan, Total past due and non-accrual loans	1,760	779
Loan, Total loans not past due	144,745	136,116
One-to-Four Family Residential Real Estate Loans [Member] | 30-59 Days Delinquent and Accruing [Member]
Loans, Total past due loans accruing	79	131
One-to-Four Family Residential Real Estate Loans [Member] | 60-89 Days Delinquent and Accruing [Member]
Loans, Total past due loans accruing	593	206
One-to-Four Family Residential Real Estate Loans [Member] | 90 Days or More Delinquent and Accruing [Member]
Loans, Total past due loans accruing
Construction and Land Loan [Member]
Loans, Total past due loans accruing		134
Loans, Non-accrual loans	898	948
Loan, Total past due and non-accrual loans	898	1,082
Loan, Total loans not past due	21,561	19,001
Construction and Land Loan [Member] | 30-59 Days Delinquent and Accruing [Member]
Loans, Total past due loans accruing
Construction and Land Loan [Member] | 60-89 Days Delinquent and Accruing [Member]
Loans, Total past due loans accruing		134
Construction and Land Loan [Member] | 90 Days or More Delinquent and Accruing [Member]
Loans, Total past due loans accruing
Commercial Real Estate [Member]
Loans, Total past due loans accruing	1,844	465
Loans, Non-accrual loans	1,440	1,791
Loan, Total past due and non-accrual loans	3,284	2,256
Loan, Total loans not past due	130,217	136,711
Commercial Real Estate [Member] | 30-59 Days Delinquent and Accruing [Member]
Loans, Total past due loans accruing	1,137	465
Commercial Real Estate [Member] | 60-89 Days Delinquent and Accruing [Member]
Loans, Total past due loans accruing	707
Commercial Real Estate [Member] | 90 Days or More Delinquent and Accruing [Member]
Loans, Total past due loans accruing
Commercial Loans [Member]
Loans, Total past due loans accruing	578	418
Loans, Non-accrual loans	1,270	1,528
Loan, Total past due and non-accrual loans	1,848	1,946
Loan, Total loans not past due	107,764	72,343
Commercial Loans [Member] | 30-59 Days Delinquent and Accruing [Member]
Loans, Total past due loans accruing	510	398
Commercial Loans [Member] | 60-89 Days Delinquent and Accruing [Member]
Loans, Total past due loans accruing	68	20
Commercial Loans [Member] | 90 Days or More Delinquent and Accruing [Member]
Loans, Total past due loans accruing
Agriculture Loans [Member] | 30-59 Days Delinquent and Accruing [Member]
Loans, Total past due loans accruing	316
Agriculture Loans [Member] | 90 Days or More Delinquent and Accruing [Member]
Loans, Total past due loans accruing
Municipal Loans [Member]
Loans, Total past due loans accruing
Loans, Non-accrual loans
Loan, Total past due and non-accrual loans
Loan, Total loans not past due	2,656	2,953
Municipal Loans [Member] | 30-59 Days Delinquent and Accruing [Member]
Loans, Total past due loans accruing
Municipal Loans [Member] | 60-89 Days Delinquent and Accruing [Member]
Loans, Total past due loans accruing
Municipal Loans [Member] | 90 Days or More Delinquent and Accruing [Member]
Loans, Total past due loans accruing
Consumer Loans [Member] | 30-59 Days Delinquent and Accruing [Member]
Loans, Total past due loans accruing	27	106
Consumer Loans [Member] | 90 Days or More Delinquent and Accruing [Member]
Loans, Total past due loans accruing
Agriculture Loans [Member]
Loans, Total past due loans accruing	316	188
Loans, Non-accrual loans	846	482
Loan, Total past due and non-accrual loans	1,162	670
Loan, Total loans not past due	97,396	95,962
Agriculture Loans [Member] | 30-59 Days Delinquent and Accruing [Member]
Loans, Total past due loans accruing		100
Agriculture Loans [Member] | 60-89 Days Delinquent and Accruing [Member]
Loans, Total past due loans accruing		88
Consumer Loans [Member]
Loans, Total past due loans accruing	27	129
Loans, Non-accrual loans	4	45
Loan, Total past due and non-accrual loans	31	174
Loan, Total loans not past due	25,070	25,254
Consumer Loans [Member] | 60-89 Days Delinquent and Accruing [Member]
Loans, Total past due loans accruing		$ 23

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