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BASIS OF PRESENTATION - Inventory (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Components of inventory    
Raw Materials $ 1,743 $ 953
Work-in-process 605 200
Finished Goods 2,511 1,640
Total 4,859 2,793
Less: reserve (152) (415)
Inventory, net $ 4,707 $ 2,378