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Acquisitions - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Jan. 31, 2021
Jan. 31, 2019
Jul. 31, 2021
Jan. 31, 2020
Business Acquisition [Line Items]        
Goodwill $ 1,215   $ 1,215 $ 1,215
Cash compensation awards $ 1,000      
Restricted common stock 797,280      
Vesting period 2 years      
Fair value for the restricted common stock $ 600      
Electric Fleet [Member]        
Business Acquisition [Line Items]        
Purchase consideration   $ 1,500    
Intangible assets   300    
Goodwill   $ 1,200