Foreign Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Entity Wide Revenue Major Customer [Line Items]
Revenues from operations	$ 5,262	$ 5,128	$ 16,745	$ 15,115
Domestic [Member]
Entity Wide Revenue Major Customer [Line Items]
Revenues from operations	3,979	3,779	11,845	11,033
Foreign [Member]
Entity Wide Revenue Major Customer [Line Items]
Revenues from operations	1,283	1,349	$ 4,900	4,082
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	696	694	$ 2,284	2,202
All other foreign countries [Member]
Entity Wide Revenue Major Customer [Line Items]
Revenues from operations	$ 587	$ 655	$ 2,616	$ 1,880