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Inventory - Schedule of Inventory (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Dec. 31, 2018
Inventory Disclosure [Abstract]      
Finished goods $ 306 $ 173 $ 284
Work in process 290 81 111
Raw materials and supplies 792 982 739
Total inventory $ 1,388 $ 1,236 $ 1,134