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Inventory (Tables)
6 Months Ended
Jun. 30, 2021
Inventory Disclosure [Abstract]  
Schedule of inventories
Inventories, net consisted of the following (in thousands):
June 30, 2021December 31, 2020
Raw materials
$16,010 $11,640 
Work in process
1,717 1,679 
Finished goods
4,312 5,041 
Total
$22,039 $18,360