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Revenue Recognition - Additional Information (Detail) - USD ($)
 3 Months Ended
Apr. 30, 2022
May 01, 2021
Jan. 31, 2022
Jan. 31, 2021
Contract liabilities and extended warranties $ 222,000     $ 262,000
Contract with customer liability revenue recognized including additions 116,000      
Contract assets balance 1,300,000   $ 1,300,000  
Additional contract costs 100,000      
Amortization of incremental direct costs 7,000      
Deferred incremental direct contract costs reported in other current assets 100,000      
Capitalized contract cost net long term and short term $ 1,400,000      
Capitalized contract costs additional amounts incurred amortization period 19 years 19 years