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Loans and Allowance for Loan Losses - Schedule of Past Due Financing Receivables (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Loans, Total past due loans accruing	$ 2,084	$ 1,671
Loans, Non-accrual loans	5,938	5,236
Loan, Total past due and non-accrual loans	8,022	6,907
Loan, Total loans not past due	$ 518,417	$ 488,340
Percentage of gross loans, Total past due loans accruing	0.40%	0.34%
Percent of gross loans, Non-accrual loans	1.13%	1.06%
Percentage of Total past due and non-accrual loans	1.53%	1.40%
Percentage of Total loans not past due	98.47%	98.60%
Agriculture Loans [Member]
Loans, Total past due loans accruing	$ 616	$ 188
Loans, Non-accrual loans	1,509	482
Loan, Total past due and non-accrual loans	2,125	670
Loan, Total loans not past due	98,833	95,962
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	2,728	2,953
Consumer Loans [Member]
Loans, Total past due loans accruing	82	129
Loans, Non-accrual loans	4	45
Loan, Total past due and non-accrual loans	86	174
Loan, Total loans not past due	24,064	25,254
Commercial Loans [Member]
Loans, Total past due loans accruing	408	418
Loans, Non-accrual loans	1,019	1,528
Loan, Total past due and non-accrual loans	1,427	1,946
Loan, Total loans not past due	99,723	72,343
30-59 Days Delinquent and Accruing [Member]
Loans, Total past due loans accruing	$ 647	$ 1,200
Percentage of gross loans, Total past due loans accruing	0.12%	0.24%
30-59 Days Delinquent and Accruing [Member] | Agriculture Loans [Member]
Loans, Total past due loans accruing		$ 100
30-59 Days Delinquent and Accruing [Member] | Municipal Loans [Member]
Loans, Total past due loans accruing
30-59 Days Delinquent and Accruing [Member] | Commercial Loans [Member]
Loans, Total past due loans accruing		398
60-89 Days Delinquent and Accruing [Member]
Loans, Total past due loans accruing	$ 1,437	$ 471
Percentage of gross loans, Total past due loans accruing	0.28%	0.10%
60-89 Days Delinquent and Accruing [Member] | Agriculture Loans [Member]
Loans, Total past due loans accruing	$ 106	$ 88
60-89 Days Delinquent and Accruing [Member] | Municipal Loans [Member]
Loans, Total past due loans accruing
60-89 Days Delinquent and Accruing [Member] | Consumer Loans [Member]
Loans, Total past due loans accruing	47	23
60-89 Days Delinquent and Accruing [Member] | Commercial Loans [Member]
Loans, Total past due loans accruing		20
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	$ 635	$ 337
Loans, Non-accrual loans	1,053	442
Loan, Total past due and non-accrual loans	1,688	779
Loan, Total loans not past due	140,113	136,116
One-to-Four Family Residential Real Estate Loans [Member] | 30-59 Days Delinquent and Accruing [Member]
Loans, Total past due loans accruing	71	131
One-to-Four Family Residential Real Estate Loans [Member] | 60-89 Days Delinquent and Accruing [Member]
Loans, Total past due loans accruing	564	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	904	948
Loan, Total past due and non-accrual loans	904	1,082
Loan, Total loans not past due	18,798	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	343	465
Loans, Non-accrual loans	1,449	1,791
Loan, Total past due and non-accrual loans	1,792	2,256
Loan, Total loans not past due	134,158	136,711
Commercial Real Estate[Member] | 30-59 Days Delinquent and Accruing [Member]
Loans, Total past due loans accruing	15	465
Commercial Real Estate[Member] | 60-89 Days Delinquent and Accruing [Member]
Loans, Total past due loans accruing	328
Commercial Real Estate[Member] | 90 Days or More Delinquent and Accruing [Member]
Loans, Total past due loans accruing
Commercial Loans [Member] | 30-59 Days Delinquent and Accruing [Member]
Loans, Total past due loans accruing	16
Commercial Loans [Member] | 60-89 Days Delinquent and Accruing [Member]
Loans, Total past due loans accruing	392
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	510
Agriculture Loans [Member] | 90 Days or More Delinquent and Accruing [Member]
Loans, Total past due loans accruing
Municipal Loans [Member] | 30-59 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	35	106
Consumer Loans [Member] | 90 Days or More Delinquent and Accruing [Member]
Loans, Total past due loans accruing

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Recorded investment in Financing receivables that are 30 days or more past due and accruing, total.

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