Quarterly report pursuant to Section 13 or 15(d)

Inventories (Details)

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Inventories (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Summary of Inventories    
Raw materials and subassemblies $ 35,425 $ 28,245
Work in process 1,950 1,507
Finished goods 45,832 34,908
Total inventories 83,207 64,660
Less: Non-current inventories (13,885) (15,073)
Inventories, current $ 69,322 $ 49,587