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Fair Value (Details Textual) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 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 2,164   2,164   $ 920
Impaired loans, allowance 326   326   61
Troubled debt restructurings 4,300   $ 4,300   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 542   $ 542   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 1,500   1,500   208
Impaired loans, allowance 256   256   $ 13
Provision for loan losses $ 300 $ 58 $ 337 $ 58