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Acquisition - Honeywell Asset Purchase and License Agreement - Additional Information (Detail)
 3 Months Ended
Apr. 28, 2018
USD ($)
Sep. 28, 2017
USD ($)
Aircraft
Apr. 28, 2018
USD ($)
$ / shares
Apr. 29, 2017
$ / shares
Jan. 31, 2018
USD ($)
Business Acquisition [Line Items]          
Initial upfront payment in cash   $ 14,600,000 $ 400,000    
Current Portion of Royalty Obligation $ 1,500,000   1,500,000   $ 1,625,000
Royalty obligation reported as long-term liability 11,393,000   11,393,000   11,760,000
Current Liability -Excess Royalty Payment Due 899,000   $ 899,000   $ 615,000
Net Income Per Common Share-Diluted | $ / shares     $ 0.12 $ 0.07  
Honeywell Asset Purchase and License Agreement [Member]          
Business Acquisition [Line Items]          
Number of aircraft families | Aircraft   2      
Initial upfront payment in cash     $ 400,000    
Minimum royalty payment term   10 years      
Minimum royalty payments $ 15,000,000   15,000,000    
Present value factor 2.80%        
Current Portion of Royalty Obligation $ 1,500,000   1,500,000    
Royalty obligation reported as long-term liability 11,400,000   11,400,000    
Excess royalty expense     500,000    
Current Liability -Excess Royalty Payment Due $ 900,000   900,000    
Additional payment to be made subject to completion of the terms of the TSA     400,000    
Increase in operating income     400,000    
Increase in operating income net of tax     $ 300,000    
Net Income Per Common Share-Diluted | $ / shares     $ 0.05    
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]          
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