Intangible Assets (Details) - Licensed Technology [Member] - USD ($) $ in Thousands  | 
Sep. 30, 2017  | 
Dec. 31, 2016  | 
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| Amortizable intangible assets [Abstract] | ||
| Gross carrying value | $ 4,608 | $ 9,608 | 
| Accumulated amortization | $ 545 | $ 1,224 | 
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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- References No definition available. 
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- Details 
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