XML 51 R39.htm IDEA: XBRL DOCUMENT v3.21.2
Property and Equipment, Net - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jul. 31, 2021
Jul. 31, 2020
Jul. 31, 2021
Jul. 31, 2020
Property, Plant and Equipment [Abstract]        
Depreciation $ 3.5 $ 1.7 $ 6.3 $ 2.8