Quarterly report pursuant to Section 13 or 15(d)

Operating Leases - Additional Information (Detail)

v3.21.2
Operating Leases - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jul. 31, 2020
Jul. 31, 2021
Jul. 31, 2020
Significant Accounting Policies [Line Items]      
Net gain (loss) on termination of lease   $ 328  
Termination Agreement [Member]      
Significant Accounting Policies [Line Items]      
Termination payment made $ 100   $ 400
Non cash gain on operating lease     300
Net gain (loss) on termination of lease     $ (100)
Sublease expiration date     2025-02