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Inventory, net (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Inventory Disclosure [Abstract]    
Raw materials $ 8,034 $ 10,219
Finished goods 20,855 19,581
Allowance for obsolescence (9,308) (9,437)
Total inventory, net $ 19,581 $ 20,363