Quarterly report pursuant to Section 13 or 15(d)

PROPERTY AND EQUIPMENT, NET (Details)

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PROPERTY AND EQUIPMENT, NET (Details) - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Property, Plant and Equipment    
Property and equipment, gross $ 57,706 $ 54,719
Less accumulated depreciation (27,319) (27,027)
Property and equipment, net 30,387 27,692
Tooling and equipment    
Property, Plant and Equipment    
Property and equipment, gross 16,221 16,024
Furniture and other equipment    
Property, Plant and Equipment    
Property and equipment, gross $ 11,942 12,076
Useful life (in years) 5 years  
Computer software    
Property, Plant and Equipment    
Property and equipment, gross $ 2,538 2,374
Useful life (in years) 5 years  
Leasehold improvements    
Property, Plant and Equipment    
Property and equipment, gross $ 18,819 16,269
Equipment under capital lease    
Property, Plant and Equipment    
Property and equipment, gross $ 192 192
Useful life (in years) 5 years  
Flight equipment held for R&D    
Property, Plant and Equipment    
Property and equipment, gross $ 7,994 $ 7,784
Useful life (in years) 2 years  
Minimum | Tooling and equipment    
Property, Plant and Equipment    
Useful life (in years) 7 years  
Minimum | Leasehold improvements    
Property, Plant and Equipment    
Useful life (in years) 3 years  
Maximum | Tooling and equipment    
Property, Plant and Equipment    
Useful life (in years) 15 years  
Maximum | Leasehold improvements    
Property, Plant and Equipment    
Useful life (in years) 10 years