Intangible Assets, net (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Gross Amount	$ 6,750	$ 6,538
Accumulated amortization	(2,772)	(2,531)
Intangible assets, net	3,978	4,007
Patents
Gross Amount	6,736	6,524
Accumulated amortization	(2,760)	(2,519)
Intangible assets, net	3,976	4,005
Trademarks
Gross Amount	14	14
Accumulated amortization	(12)	(12)
Intangible assets, net	$ 2	$ 2

Amount after amortization of assets, excluding goodwill and land use rights, lacking physical substance with a finite life.

No definition available.

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- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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