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SIGNIFICANT ACCOUNTING POLICIES - Inventory, Net (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Components of inventory    
Raw materials $ 4,471 $ 3,213
Work-in-process 345 1,455
Finished goods 4,468 4,119
Inventory in transit 1,624  
Total 10,908 8,787
Less: reserve (152) (152)
Inventory, net $ 10,756 $ 8,635