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Inventories (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Inventory Disclosure [Abstract]    
Raw materials $ 4,810 $ 4,339
Finished goods 20,155 24,569
Inventories 24,965 28,908
Less reserve for excess and obsolete inventory (1,627) (5,698)
Inventories, net $ 23,338 $ 23,210