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Loans (Details Textual) | 12 Months Ended
--- | ---
Dec. 31, 2018 USD ($) Loans | Dec. 31, 2017 USD ($) Loans | Dec. 31, 2016 USD ($) Loans
Financing Receivable Modifications [Line Items] |  |  |
Total troubled debt restructurings | $ 5,500,000 | $ 5,000,000 |
Specific reserves to customers | 276,000 | 162,000 |
Commitments to lend additional amounts to borrowers classified as troubled debt restructurings | 0 | 0 |
Allowance adjustment charge offs |  | 75,000 | $ 344,000
Increase in the allowance for loan losses as a result of the allowance |  | $ 75,000 | 43,000
Troubled debt restructured loans with subsequent payment defaults | Loans | Loans |  | 0 |
Maximum commercial loan and commercial real estate relationships | 750,000 |  |
Residential real estate loan |  |  |
Financing Receivable Modifications [Line Items] |  |  |
Total troubled debt restructurings | $ 146,000 |  | $ 1,000
Troubled debt restructured loans with subsequent payment defaults | Loans | Loans | 2 |  | 1
Loans default payment past due period | 30 days |  |
Commercial real estate loan |  |  |
Financing Receivable Modifications [Line Items] |  |  |
Total troubled debt restructurings |  |  | $ 1,200
Troubled debt restructured loans with subsequent payment defaults | Loans | Loans |  |  | 2
Residential real estate, Home equity lines of credit |  |  |
Financing Receivable Modifications [Line Items] |  |  |
Total troubled debt restructurings |  |  | $ 10,000
Troubled debt restructured loans with subsequent payment defaults | Loans | Loans |  |  | 1
Troubled debt restructurings |  |  |
Financing Receivable Modifications [Line Items] |  |  |
Specific reserves to customers | $ 72,000 | $ 68,000 |
Contractual Interest Rate Reduction | Minimum |  |  |
Financing Receivable Modifications [Line Items] |  |  |
Reduction of the notes stated interest rate | 0.49% |  |
Contractual Interest Rate Reduction | Maximum |  |  |
Financing Receivable Modifications [Line Items] |  |  |
Reduction of the notes stated interest rate | 3.49% |  |
Extended Maturity | Minimum |  |  |
Financing Receivable Modifications [Line Items] |  |  |
Maturity period loans | 5 months |  |
Extended Maturity | Maximum |  |  |
Financing Receivable Modifications [Line Items] |  |  |
Maturity period loans | 132 months |  |

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