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Inventories (Tables)
12 Months Ended
Dec. 31, 2020
Inventory Disclosure [Abstract]  
Components of inventories Inventories as of December 31, 2020 and 2019 include the costs of material, labor, and factory overhead. Components of inventories consist of the following:
 December 31,
 20202019
Raw materials$13,957 $12,755 
Work in process3,996 3,117 
Finished goods6,721 7,593 
$24,674 $23,465