Annual report pursuant to Section 13 and 15(d)

Inventory, net (Details)

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Inventory, net (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Inventory Disclosure [Abstract]    
Raw materials $ 4,854 $ 6,489
Finished goods 23,056 21,225
Allowance for obsolescence (5,712) (7,515)
Total inventory, net $ 22,198 $ 20,199