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Geographic Information - Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended
Apr. 30, 2021
Apr. 30, 2020
Revenues from External Customers and Long-Lived Assets    
Revenue $ 228,914 $ 108,815
United States    
Revenues from External Customers and Long-Lived Assets    
Revenue 186,185 92,577
Other    
Revenues from External Customers and Long-Lived Assets    
Revenue $ 42,729 $ 16,238