Loans and Allowance - Current, Past Due, and Non-Accrual Loans by Categories of loans and Restructured Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 241,777	$ 247,976
Non-accrual	4,442	4,512	$ 4,088	$ 4,127
Total	246,853	253,772
Financing Receivables 30 To 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	618	1,266
Financing Receivables, Equal to Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 Days or More and Still Accruing	16	18
Real Estate Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	143,420	143,485
Non-accrual	4,303	4,299
Total	148,135	148,555
Real Estate Loan | Financing Receivables 30 To 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	396	753
Real Estate Loan | Financing Receivables, Equal to Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 Days or More and Still Accruing	16	18
Commercial and Industrial Sector [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	27,957	27,912
Total	27,957	27,912
Consumer Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current		76,579
Non-accrual		213
Total	70,761	77,305
Consumer Loan [Member] | Financing Receivables 30 To 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due		513
Construction And Land Development | Real Estate Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	3,174	2,553
Total	3,174	2,553
Farmland | Real Estate Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	349	350
Total	349	350
Single-family residential | Real Estate Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	82,616	82,232
Non-accrual	137	270	779	790
Total	82,820	82,520
Single-family residential | Real Estate Loan | Financing Receivables 30 To 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	51
Single-family residential | Real Estate Loan | Financing Receivables, Equal to Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 Days or More and Still Accruing	16	18
Multifamily | Real Estate Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	6,069	6,105
Non-accrual			20	24
Total	6,069	6,105
Commercial | Real Estate Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	51,212	52,245
Non-accrual	4,166	4,029	3,107	3,139
Total	55,723	57,027
Commercial | Real Estate Loan | Financing Receivables 30 To 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	345	753
Commercial | Consumer Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	70,400
Non-accrual	139
Total	70,761
Commercial | Consumer Loan [Member] | Financing Receivables 30 To 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	222
Commercial And Industrial Portfolio Segment [Member] | Commercial and Industrial Sector [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	9,521	10,800
Total	9,521	10,800
SBA Guaranty | Commercial and Industrial Sector [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	7,192	7,200
Total	7,192	7,200
Comm SBA PPP | Commercial and Industrial Sector [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	11,244	9,912
Total	11,244	9,912
Consumer | Consumer Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	2,481	3,028
Non-accrual		34	46	51
Total	2,482	3,063
Consumer | Consumer Loan [Member] | Financing Receivables 30 To 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1	1
Automobile | Consumer Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	67,919	73,551
Non-accrual	139	179	$ 136	$ 123
Total	68,279	74,242
Automobile | Consumer Loan [Member] | Financing Receivables 30 To 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	$ 221	$ 512