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Fair Value (Details Textual) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 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 $ 0 $ 0  
Impaired loans, unpaid principal balance with allowance recorded 776   776   $ 920
Impaired loans, allowance 59   59   61
Troubled debt restructurings 4,600   $ 4,600   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 561   $ 561   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 230   230   208
Impaired loans, allowance 16   16   $ 13
Provision for loan losses $ 32 $ 46 $ 37 $ 46