Domestic and Foreign Revenues (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Entity Wide Revenue Major Customer [Line Items]
Revenues from operations	$ 22,402	$ 20,891
Domestic [Member]
Entity Wide Revenue Major Customer [Line Items]
Revenues from operations	16,090	14,893
Foreign [Member]
Entity Wide Revenue Major Customer [Line Items]
Revenues from operations	$ 6,313	5,998
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	$ 3,038	3,240
All other foreign countries [Member]
Entity Wide Revenue Major Customer [Line Items]
Revenues from operations	$ 3,275	$ 2,758