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Domestic and Foreign Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Entity Wide Revenue Major Customer [Line Items]
Revenues from operations	$ 6,338	$ 5,262	$ 18,440	$ 16,745
Foreign [Member]
Entity Wide Revenue Major Customer [Line Items]
Revenues from operations	1,508	1,283	$ 4,489	4,900
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	771	696	$ 2,238	2,284
Hong Kong [Member]
Entity Wide Revenue Major Customer [Line Items]
Revenues from operations	218	45	451	214
All other foreign countries [Member]
Entity Wide Revenue Major Customer [Line Items]
Revenues from operations	519	542	1,800	2,402
Domestic [Member]
Entity Wide Revenue Major Customer [Line Items]
Revenues from operations	$ 4,830	$ 3,979	$ 13,951	$ 11,845

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