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Inventory (Tables)
3 Months Ended
Mar. 31, 2021
Inventory Disclosure [Abstract]  
Schedule of inventories
Inventories, net consisted of the following (in thousands):
March 31, 2021December 31, 2020
Raw materials
$13,576 $11,640 
Work in process
1,808 1,679 
Finished goods
4,989 5,041 
Total
$20,373 $18,360