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Summary of Significant Accounting Policies - Additional Information (Detail)
shares in Thousands
 3 Months Ended
Mar. 30, 2019
USD ($)
segment
shares
Mar. 31, 2018
USD ($)
shares
Dec. 30, 2018
USD ($)
Summary Of Significant Accounting Policies [Line Items]      
Depreciation and amortization $ 5,419,000 $ 5,241,000  
Impairment of goodwill, intangible assets and other long-lived assets $ 0 0  
Number of Sources of Product Revenue | segment 4    
Number of days royalty revenue is adjusted subsequent to quarter end 60 days    
Royalty $ 700,000 $ 8,100,000  
Options to purchase of shares of common stock | shares 300 900  
Cumulative Effect on Retained Earnings, Net of Tax, ROU Assets and Lease Liabilities     $ 22,500,000
Cumulative Effect on Retained Earnings, Net of Tax, Lease Receivable     57,700,000
Cumulative Effect on Retained Earnings, Net of Tax, Leased Equipment     103,500,000
Cumulative Effect on Retained Earnings, Net of Tax, Deferred Tax Assets     8,600,000
Cumulative Effect on Retained Earnings, Net of Tax, Deferred Tax Deferred Revenue and Contract-Related Liabilities     13,400,000
Cumulative Effect on Retained Earnings, Net of Tax, Other Current Liabilities     $ 3,000,000
Patents      
Summary Of Significant Accounting Policies [Line Items]      
Finite-Lived Intangible Assets, Cost Incurred to Renew or Extend $ 300,000 $ 100,000  
Weighted average number of years until the next renewal 1 year    
Trademarks      
Summary Of Significant Accounting Policies [Line Items]      
Weighted average number of years until the next renewal 6 years    
Buildings      
Summary Of Significant Accounting Policies [Line Items]      
Property, Plant and Equipment, Useful Life 39 years    
Demonstration units      
Summary Of Significant Accounting Policies [Line Items]      
Property, Plant and Equipment, Useful Life 3 years    
Tooling      
Summary Of Significant Accounting Policies [Line Items]      
Property, Plant and Equipment, Useful Life 3 years    
Vehicles      
Summary Of Significant Accounting Policies [Line Items]      
Property, Plant and Equipment, Useful Life 5 years    
Restricted Stock Units (RSUs)      
Summary Of Significant Accounting Policies [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | shares 88    
Restricted Stock Units (RSUs) | Chief Executive Officer      
Summary Of Significant Accounting Policies [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | shares 2,700 2,700  
Minimum      
Summary Of Significant Accounting Policies [Line Items]      
Maturity of Time Deposits 6 months    
Revenue, remaining performance obligation, expected timing of satisfaction, period 3 years    
Warranty period for defects in material and workmanship 6 months    
Minimum | Aircraft and components      
Summary Of Significant Accounting Policies [Line Items]      
Property, Plant and Equipment, Useful Life 10 years    
Minimum | Building improvements      
Summary Of Significant Accounting Policies [Line Items]      
Property, Plant and Equipment, Useful Life 7 years    
Minimum | Computer equipment      
Summary Of Significant Accounting Policies [Line Items]      
Property, Plant and Equipment, Useful Life 2 years    
Minimum | Furniture and office equipment      
Summary Of Significant Accounting Policies [Line Items]      
Property, Plant and Equipment, Useful Life 2 years    
Minimum | Machinery and equipment      
Summary Of Significant Accounting Policies [Line Items]      
Property, Plant and Equipment, Useful Life 5 years    
Maximum      
Summary Of Significant Accounting Policies [Line Items]      
Maturity of Time Deposits 1 year    
Revenue, remaining performance obligation, expected timing of satisfaction, period 6 years    
Warranty period for defects in material and workmanship 48 months    
Maximum | Aircraft and components      
Summary Of Significant Accounting Policies [Line Items]      
Property, Plant and Equipment, Useful Life 20 years    
Maximum | Building improvements      
Summary Of Significant Accounting Policies [Line Items]      
Property, Plant and Equipment, Useful Life 15 years    
Maximum | Computer equipment      
Summary Of Significant Accounting Policies [Line Items]      
Property, Plant and Equipment, Useful Life 6 years    
Maximum | Furniture and office equipment      
Summary Of Significant Accounting Policies [Line Items]      
Property, Plant and Equipment, Useful Life 6 years    
Maximum | Machinery and equipment      
Summary Of Significant Accounting Policies [Line Items]      
Property, Plant and Equipment, Useful Life 10 years