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Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Summary of net revenues by geographic region
Total revenues	$ 1,876	$ 2,329	$ 4,251	$ 4,661
Revenues percentage	100.00%	100.00%	100.00%	100.00%
United States [Member]
Summary of net revenues by geographic region
Total revenues	$ 792	$ 1,136	$ 1,931	$ 2,226
Revenues percentage	42.00%	49.00%	45.00%	48.00%
Japan [Member]
Summary of net revenues by geographic region
Total revenues	$ 708	$ 448	$ 1,496	$ 896
Revenues percentage	38.00%	19.00%	35.00%	19.00%
Germany [Member]
Summary of net revenues by geographic region
Total revenues	$ 181	$ 251	$ 409	$ 570
Revenues percentage	10.00%	11.00%	10.00%	12.00%
China [Member]
Summary of net revenues by geographic region
Total revenues	$ 69	$ 270	$ 198	$ 539
Revenues percentage	4.00%	12.00%	5.00%	12.00%
Sweden [Member]
Summary of net revenues by geographic region
Total revenues	$ 4	$ 86	$ 9	$ 93
Revenues percentage		3.00%		2.00%
Taiwan [Member]
Summary of net revenues by geographic region
Total revenues	$ 46	$ 24	$ 110	$ 94
Revenues percentage	2.00%	1.00%	3.00%	2.00%
Singapore [Member]
Summary of net revenues by geographic region
Total revenues	$ (1)	$ 40		$ 108
Revenues percentage		2.00%		2.00%
Canada [Member]
Summary of net revenues by geographic region
Total revenues		$ 27		$ 77
Revenues percentage		1.00%		2.00%
United Arab Emirates [Member]
Summary of net revenues by geographic region
Total revenues	$ 48		$ 48
Revenues percentage	3.00%		1.00%
Other [Member]
Summary of net revenues by geographic region
Total revenues	$ 6	$ 14	$ 50	$ 58
Revenues percentage		1.00%	1.00%	1.00%
South Korea [Member]
Summary of net revenues by geographic region
Total revenues	$ 23
Revenues percentage	1.00%
India [Member]
Summary of net revenues by geographic region
Total revenues		$ 19
Revenues percentage		1.00%
Switzerland [Member]
Summary of net revenues by geographic region
Total revenues		$ 14
Revenues percentage		1.00%

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-Publisher FASB
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