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Loans and Allowance - Credit Quality Information (Details) $ in Thousands | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2020 USD ($) loan | Dec. 31, 2019 USD ($) loan | Mar. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total | $ 276,960 | $ 284,738 |  |
Non-accrual | 4,088 | 4,127 | $ 2,462 | $ 1,947
Troubled debt restructures | $ 40 | $ 41 |  |
Number of TDRs accounts | loan | 1 | 1 |  |
Non-performing TDRs | loan | 40 | 41 |  |
Number of non-performing TDRs accounts | loan | 1 | 1 |  |
Pass |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total | $ 272,352 | $ 280,070 |  |
Substandard |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total | 4,555 | 4,589 |  |
Doubtful |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total | 53 | 79 |  |
Consumer |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total | 12,700 | 12,076 |  |
Non-accrual | 132 | 137 | 312 | 186
Troubled debt restructures | $ 40 | $ 41 |  |
Number of TDRs accounts | loan | 1 | 1 |  |
Non-performing TDRs | loan | 40 | 41 |  |
Number of non-performing TDRs accounts | loan | 1 | 1 |  |
Consumer | Pass |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total | $ 12,568 | $ 11,939 |  |
Consumer | Substandard |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total | 132 | 137 |  |
Residential Real estate |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total | 80,782 | 81,033 |  |
Non-accrual | 713 | 728 | 1,232 | 956
Residential Real estate | Pass |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total | 80,069 | 80,305 |  |
Residential Real estate | Substandard |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total | 713 | 728 |  |
Indirect |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total | 95,093 | 102,384 |  |
Non-accrual | 136 | 123 | 186 | 116
Indirect | Pass |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total | 94,957 | 102,261 |  |
Indirect | Substandard |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total | 83 | 44 |  |
Indirect | Doubtful |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total | 53 | 79 |  |
Commercial |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total | 13,172 | 11,907 |  |
Non-accrual |  |  | 86 | 27
Commercial | Pass |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total | 13,172 | 11,907 |  |
Construction |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total | 2,563 | 3,317 |  |
Construction | Pass |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total | 2,563 | 3,317 |  |
Commercial Real Estate |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total | 72,650 | 74,021 |  |
Non-accrual | 3,107 | 3,139 | $ 646 | $ 662
Commercial Real Estate | Pass |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total | 69,023 | 70,341 |  |
Commercial Real Estate | Substandard |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total | $ 3,627 | $ 3,680 |  |

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