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COMPONENTS OF THE COMPANY'S CONDENSED CONSOLIDATED BALANCE SHEETS Inventory (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Balance Sheet Related Disclosures [Abstract]    
Raw materials $ 12,215 $ 14,610
Work-in-process 16,442 15,194
Finished goods 23,775 22,760
Total $ 52,432 $ 52,564