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Summary of Significant Accounting Policies (Details 1) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Accounting Policies [Abstract]    
Raw materials $ 476 $ 3,112
Work-in-process 2,993 4,251
Finished goods 623 637
Inventories $ 4,092 $ 8,000