Segment Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenues	$ 10,241	$ 10,213	$ 11,115
Revenues percentage	100.00%	100.00%	100.00%
United States [Member]
Revenues	$ 4,187	$ 5,374	$ 5,687
Revenues percentage	41.00%	53.00%	51.00%
China [Member]
Revenues	$ 737	$ 1,365	$ 600
Revenues percentage	7.00%	13.00%	5.00%
Sweden [Member]
Revenues	$ 515	$ 1,105	$ 2,372
Revenues percentage	5.00%	11.00%	21.00%
Germany [Member]
Revenues	$ 1,188	$ 822	$ 390
Revenues percentage	12.00%	8.00%	4.00%
Japan [Member]
Revenues	$ 2,800	$ 755	$ 905
Revenues percentage	27.00%	7.00%	8.00%
Canada [Member]
Revenues	$ 89	$ 432	$ 489
Revenues percentage	1.00%	4.00%	4.00%
Taiwan [Member]
Revenues	$ 268	$ 228	$ 312
Revenues percentage	3.00%	2.00%	3.00%
South Korea [Member]
Revenues	$ 176	$ 71	$ 133
Revenues percentage	2.00%	1.00%	1.00%
Singapore [Member]
Revenues	$ 147
Revenues percentage	1.00%
Other [Member]
Revenues	$ 134	$ 61	$ 227
Revenues percentage	1.00%	1.00%	3.00%