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Inventories (Tables)
12 Months Ended
Dec. 31, 2020
Inventory Disclosure [Abstract]  
Schedule of Inventories
Inventories consisted of the following:
December 3120202019
Work in process$3,990 $4,419 
Raw materials1,712 1,733 
Finished goods30 30 
Pre-owned aircraft13 124 
Total inventories$5,745 $6,306