Domestic and Foreign Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Entity Wide Revenue Major Customer [Line Items]
Revenues from operations	$ 6,157	$ 5,859	$ 12,102	$ 11,483
Foreign [Member]
Entity Wide Revenue Major Customer [Line Items]
Revenues from operations	1,547	1,975	$ 2,981	3,617
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	772	765	$ 1,467	1,588
India [Member]
Entity Wide Revenue Major Customer [Line Items]
Revenues from operations	9	334	138	410
All other foreign countries [Member]
Entity Wide Revenue Major Customer [Line Items]
Revenues from operations	766	876	1,376	1,619
Domestic [Member]
Entity Wide Revenue Major Customer [Line Items]
Revenues from operations	$ 4,610	$ 3,884	$ 9,121	$ 7,866