Domestic and Foreign Revenues (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Entity Wide Revenue Major Customer [Line Items]
Revenues from operations	$ 5,945	$ 5,624
Domestic [Member]
Entity Wide Revenue Major Customer [Line Items]
Revenues from operations	4,511	3,982
Foreign [Member]
Entity Wide Revenue Major Customer [Line Items]
Revenues from operations	$ 1,434	1,642
Foreign [Member] | Sales Revenue, Segment [Member] | Customer Concentration Risk [Member]
Entity Wide Revenue Major Customer [Line Items]
Portion of foreign sales	10.00%
Malaysia [Member]
Entity Wide Revenue Major Customer [Line Items]
Revenues from operations	$ 695	823
All other foreign countries [Member]
Entity Wide Revenue Major Customer [Line Items]
Revenues from operations	$ 739	$ 819