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Inventory (Tables)
9 Months Ended
Sep. 30, 2021
Inventory Disclosure [Abstract]  
Inventory Inventory consists of the following (in thousands):
September 30, 2021December 31, 2020
Raw materials$1,744 $2,422 
Work-in-process9,388 10,703 
Finished goods4,198 2,167 
Total inventory$15,330 $15,292