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Inventories (Tables)
6 Months Ended
Jun. 30, 2019
Inventory Disclosure [Abstract]  
Schedule of Inventory
Inventories as of June 30, 2019 and December 31, 2018 are summarized in the following table:
June 30,
2019
December 31,
2018
Finished goods$71,182 $69,041 
Contract assets37,457 26,692 
Work-in-process5,594 6,940 
Raw materials20,215 21,831 
Inventories - net$134,448 $124,504