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Operating Leases - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jul. 31, 2020
Jul. 31, 2019
Jul. 31, 2020
Jul. 31, 2019
Leases [Abstract]        
Operating lease, description     The Company leases its headquarters located in Sunnyvale, California, as well as office and data center space in various locations under non-cancelable operating lease agreements.  
Lease costs $ 1.3 $ 0.9 $ 2.5 $ 1.7