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Inventory (Tables)
6 Months Ended
Jun. 30, 2020
Inventory Disclosure [Abstract]  
Schedule of inventory
Inventory consisted of the following:
         
(in thousands)June 30,
2020
December 31,
2019
Raw materials$15,629  $11,417  
Work in process12,991  9,450  
Finished goods6,714  8,313  
Total inventory$35,334  $29,180