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Supplemental Executive Retirement Plan (Details Narrative) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($) Number	Mar. 31, 2018 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2013 USD ($)
Defined benefit plan, net periodic benefit cost	$ 101	$ 100
Supplemental Executive Retirement and Death Benefit Agreements [Member]
Time period for calculating base salary under SERP agreements	5 years
Retirement age | Number	67
Share-based compensation arrangement by share-based payment award, award vesting period	6 years
Retirement plan monthly instalments | Number	180
Purchased Fixed Annuity for Financing Retirement Benefits [Member] | Supplemental Executive Retirement and Death Benefit Agreements [Member]
Other investments				$ 11,400
Annuity contracts accrued income	$ 32	$ 27
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	$ 12,300		$ 12,400

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