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Acquisition - Honeywell Asset Purchase and License Agreement - Additional Information (Detail)
 3 Months Ended 9 Months Ended
Sep. 28, 2017
USD ($)
Air-craft
Oct. 27, 2018
USD ($)
$ / shares
Oct. 28, 2017
$ / shares
Oct. 27, 2018
USD ($)
$ / shares
Oct. 27, 2018
USD ($)
Oct. 28, 2017
USD ($)
$ / shares
Jan. 31, 2018
USD ($)
Business Acquisition [Line Items]              
Initial upfront payment in cash $ 14,600,000         $ 14,873,000  
Current Portion of Royalty Obligation   $ 1,750,000   $ 1,750,000 $ 1,750,000   $ 1,625,000
Royalty obligation reported as long-term liability   10,408,000   10,408,000 10,408,000   11,760,000
Current Liability -Excess Royalty Payment Due   $ 1,246,000   $ 1,246,000 1,246,000   $ 615,000
Net Income Per Common Share-Diluted | $ / shares   $ 0.20 $ 0.21 $ 0.49   $ 0.38  
Honeywell Asset Purchase and License Agreement [Member]              
Business Acquisition [Line Items]              
Number of aircraft families | Air-craft 2            
Initial upfront payment in cash $ 14,600,000     $ 400,000      
Minimum royalty payment term 10 years            
Minimum royalty payments $ 15,000,000            
Present value of payments   $ 15,000,000   $ 15,000,000 15,000,000    
Present value factor       2.80%      
Current Portion of Royalty Obligation   1,800,000   $ 1,800,000 1,800,000    
Royalty obligation reported as long-term liability   10,400,000   10,400,000 10,400,000    
Excess royalty expense   700,000   2,000,000      
Current Liability -Excess Royalty Payment Due   $ 1,200,000   1,200,000 1,200,000    
Increase in operating income       400,000      
Increase in operating income net of tax       $ 300,000      
Net Income Per Common Share-Diluted | $ / shares       $ 0.05      
Transaction cost $ 300,000            
Internal rate of return 21.00%            
Amortization period of intangibles 10 years            
Honeywell Asset Purchase and License Agreement [Member] | Minimum [Member] | Intangible Assets [Member]              
Business Acquisition [Line Items]              
Fair value assumptions, Annual earnings projections $ 3,900,000            
Honeywell Asset Purchase and License Agreement [Member] | Maximum [Member] | Intangible Assets [Member]              
Business Acquisition [Line Items]              
Fair value assumptions, Annual earnings projections 5,400,000            
Honeywell Asset Purchase and License Agreement [Member] | Amended Credit Agreement with Bank Of America [Member] | Revolving Credit Facility [Member]              
Business Acquisition [Line Items]              
Initial upfront payment in cash 14,600,000            
Transition Services Agreement [Member]              
Business Acquisition [Line Items]              
Initial upfront payment in cash         $ 400,000    
Increase in operating income       $ 1,000,000      
Increase in operating income net of tax       $ 800,000      
Net Income Per Common Share-Diluted | $ / shares       $ 0.12      
Minimum royalty payment obligation and transaction cost $ 400,000