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Intangible Assets - Additional Information (Detail) - USD ($)
3 Months Ended 6 Months Ended
Jul. 31, 2021
Aug. 01, 2020
Jul. 31, 2021
Aug. 01, 2020
Intangible Assets [Line Items]        
Impairments of intangible assets     $ 0 $ 0
Amortization expense $ 400,000 $ 1,000,000.0 1,400,000 $ 2,100,000
Customer Contracts [Member] | RITEC [Member]        
Intangible Assets [Line Items]        
Finite lived intangible assets remaining useful Life 4 years      
Customer Contracts [Member] | Honeywell Asset Purchase and License Agreement [Member]        
Intangible Assets [Line Items]        
Finite lived intangible assets remaining useful Life 6 years      
Customer Contracts [Member] | Intangible Assets, Amortization Period [Member]        
Intangible Assets [Line Items]        
Decrease In amortization expense $ 587,000   587,000  
Increase in net income due to change of amortization method 587,000   587,000  
Increase in net income loss net of tax due to change in the method of amortization $ 553,000   $ 553,000  
Increase in diluted earnings per share due to change in the method of amortization $ 0.08   $ 0.08  
Customer Contracts [Member] | Intangible Assets, Amortization Period [Member] | RITEC [Member]        
Intangible Assets [Line Items]        
Finite lived intangible assets remaining useful Life 20 years      
Customer Contracts [Member] | Intangible Assets, Amortization Period [Member] | Honeywell Asset Purchase and License Agreement [Member]        
Intangible Assets [Line Items]        
Finite lived intangible assets remaining useful Life 20 years