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Supplemental Executive Retirement Plan (Details Narrative) $ in Thousands | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2019 USD ($) Age Installment | Jun. 30, 2018 USD ($) | Jun. 30, 2019 USD ($) Age Installment | Jun. 30, 2018 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2013 USD ($)
Annual benefit plan fees | $ 110 |  |  |  |  |
Defined benefit plan, net periodic benefit cost | $ (65) | $ 385 | $ 202 | $ 486 |  |
Supplemental Executive Retirement and Death Benefit Agreements [Member] |  |  |  |  |  |
Time period for calculating base salary under SERP agreements |  |  | 5 years |  |  |
Retirement age | Age | 67 |  | 67 |  |  |
Share-based compensation arrangement by share-based payment award, award vesting period |  |  | 6 years |  |  |
Retirement plan monthly installments | Installment | 180 |  | 180 |  |  |
Purchased Fixed Annuity for Financing Retirement Benefits [Member] | Supplemental Executive Retirement and Death Benefit Agreements [Member] |  |  |  |  |  |
Annual benefit plan fees | $ 141 |  | $ 150 | $ 119 |  |
Other investments |  |  |  |  |  | $ 11,400
Annuity contracts accrued income | 40 | $ 65 | 81 |  |  |
Purchased Fixed Annuity for Financing Retirement Benefits [Member] | Supplemental Executive Retirement and Death Benefit Agreements [Member] | Other Assets [Member] |  |  |  |  |  |
Cash surrender value of life insurance | $ 12,100 |  | $ 12,100 |  | $ 12,400 |

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