Revenue and Contract Balances - Disaggregation of Revenue by Type of Customer (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2021	Jul. 31, 2020
Disaggregation of Revenue [Line Items]
Revenue	$ 45,750	$ 20,674	$ 83,145	$ 38,631
% of Revenue	100.00%	100.00%	100.00%	100.00%
Channel partners
Disaggregation of Revenue [Line Items]
Revenue	$ 42,126	$ 19,698	$ 76,238	$ 36,813
% of Revenue	92.00%	95.00%	92.00%	95.00%
Direct customers
Disaggregation of Revenue [Line Items]
Revenue	$ 3,624	$ 976	$ 6,907	$ 1,818
% of Revenue	8.00%	5.00%	8.00%	5.00%