Revenue and Contract Balances - Narrative (Details) - USD ($)	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Disaggregation of Revenue [Line Items]
Unbilled receivables, current	$ 1,500,000	$ 1,500,000
Contract with customer, liability	262,000,000	141,800,000
Contract with customer, liability, revenue recognized	95,500,000	53,800,000	$ 25,900,000
Capitalized contract cost, impairment loss	$ 0	$ 0	$ 0
Minimum
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, contract term	1 year
Maximum
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, contract term	3 years