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Inventories - Schedule of Inventory (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Inventory Disclosure [Abstract]    
Raw materials $ 4,064 $ 4,041
Finished goods 5,749 8,229
Reserve for excess, obsolete, and slow-moving inventories (3,645) (4,212)
Inventories, net 6,168 $ 8,058
Decrease in gross inventory levels $ 1,900