Revenue Recognition - Disaggregation of Revenue by Region According to Location of Customers (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Disaggregation of Revenue [Line Items]
Total revenue	$ 892,252	$ 607,643	$ 336,156
Revenue | Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of Revenue	100.00%	100.00%	100.00%
Americas
Disaggregation of Revenue [Line Items]
Total revenue	$ 430,326	$ 260,016	$ 125,360
Americas | Revenue | Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of Revenue	48.00%	43.00%	37.00%
Europe, Middle East, and Africa
Disaggregation of Revenue [Line Items]
Total revenue	$ 261,857	$ 187,072	$ 113,887
Europe, Middle East, and Africa | Revenue | Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of Revenue	29.00%	31.00%	34.00%
Asia-Pacific
Disaggregation of Revenue [Line Items]
Total revenue	$ 200,069	$ 160,555	$ 96,909
Asia-Pacific | Revenue | Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of Revenue	23.00%	26.00%	29.00%
United States | Revenue | Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of Revenue	43.00%	39.00%	34.00%
Japan | Revenue | Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of Revenue	11.00%	14.00%	17.00%