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Inventory (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Inventory Disclosure [Abstract]    
Raw materials $ 493 $ 210
Work-in-process 131 138
Finished goods 1,006 1,033
Subtotal inventory 1,630 1,381
Inventory obsolescence reserve (138) (138)
Total Inventory $ 1,492 $ 1,243