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Fair Value (Details Textual) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Fair value assets liabilities transfers amount between level 1 and level 2 | $ 0 | $ 0 |
Impaired loans, unpaid principal balance with allowance recorded | 966 |  | $ 920
Impaired loans, allowance | 61 |  | 61
Troubled debt restructurings | $ 4,700 |  | 4,600
Maximum maturity period of short term borrowings | 90 days |  |
Measured Using Present Value of Cash Flows |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Troubled debt restructurings | $ 575 |  | 583
Collateral Dependent Impaired Loans |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Impaired loans, unpaid principal balance with allowance recorded | 297 |  | 208
Impaired loans, allowance | 18 |  | $ 13
Provision for loan losses | $ 5 | $ 223 |

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