Revenue Recognition - Summary Disaggregation of Revenue by Region (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2020	Apr. 30, 2019
Disaggregation of Revenue [Line Items]
Revenue	$ 328,167	$ 121,988
Percentage of revenue	100.00%	100.00%
Americas
Disaggregation of Revenue [Line Items]
Revenue	$ 245,633	$ 98,160
Percentage of revenue	75.00%	80.00%
Asia Pacific (“APAC”)
Disaggregation of Revenue [Line Items]
Revenue	$ 31,278	$ 10,441
Percentage of revenue	9.00%	9.00%
Europe, Middle East, and Africa (“EMEA”)
Disaggregation of Revenue [Line Items]
Revenue	$ 51,256	$ 13,387
Percentage of revenue	16.00%	11.00%