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Consolidated Balance Sheet Detail - Schedule of Intangible assets (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 USD ($)
Intangible assets |
Net Carrying Value | $ 111
Patent license |
Intangible assets |
Life | 7 years
Gross Carrying Amount | $ 780
Accumulated Amortization | 669
Net Carrying Value | $ 111

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