Income Taxes (Details 2) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Depreciation	$ (1,667)	$ (1,185)
Unrealized losses on investments available for sale	(9)	5
Retainage	(425)	(264)
Allowance for doubtful accounts	53	52
Prepaid expenses	(78)	(98)
Vacation accrued	78	67
Deferred income	321	0
State NOL carryforward	26	48
UNICAP	105	0
Other	169	85
Net deferred tax liability	$ (1,427)	$ (1,290)