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Inventory (Tables)
3 Months Ended
Mar. 31, 2021
Inventory Disclosure [Abstract]  
Schedule of inventory
Inventory consisted of the following:
        
(in thousands)March 31,
2021
December 31,
2020
Raw materials$15,297 $16,000 
Work in process8,606 11,212 
Finished goods6,454 8,532 
Total inventory$30,357 $35,744