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Inventories (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Inventory Disclosure [Abstract]    
Raw materials $ 7,104 $ 6,834
Work in progress 352 0
Finished goods 8,309 6,284
Reserve (1,328) (410)
Total $ 14,437 $ 12,708 [1]
[1] Derived from the audited December 31, 2016 financial statements