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Royalty Obligation - Additional Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Aug. 03, 2019
Jun. 28, 2018
Aug. 03, 2019
Jul. 28, 2018
Jan. 31, 2019
Jan. 31, 2018
Guaranteed Minimum Royalty Payment     $ 2,500      
Royalty Obligation, Current $ 2,000   2,000   $ 1,875  
Royalty Obligation Non Current 8,964   8,964   9,916  
Accrued Royalties, Current, Excess Royalty Payment Due 647   $ 647   $ 1,265  
Honeywell Asset Purchase and License Agreement [Member]            
Payment Term Period     10 years      
Minimum Royalty Payment Obligations           $ 15,000
Fair Value Assumption Percentage Of Present Value Factor     2.80%      
Royalty Obligation, Current 2,000   $ 2,000      
Royalty Obligation Non Current 9,000   9,000      
Excess Royalty Payments $ 100 $ 900 $ 700 $ 1,300