Quarterly report pursuant to Section 13 or 15(d)

4. INVENTORY (Tables)

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4. INVENTORY (Tables)
3 Months Ended
Mar. 31, 2021
Inventory Disclosure [Abstract]  
Inventory
    March 31,     December 31,  
(in thousands)   2021     2020  
Raw materials   $ 11,264     $ 7,950  
Work in process     -       -  
Finished goods     2,624       1,983  
Total inventory   $ 13,888     $ 9,933