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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 |  |

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