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Leases - Information About Leases on Condensed Consolidated Statement of Operations (Details) - USD ($)
$ in Thousands
3 Months Ended
Apr. 30, 2021
Apr. 30, 2020
Leases [Abstract]    
Operating lease expense $ 1,369 $ 1,442
Short-term lease expense 90 299
Variable lease expense $ 113 $ 302