Fair Value Measurements - Assets and Liabilities (Details) - USD ($) $ in Thousands	Jan. 31, 2022	Jan. 31, 2021
Liabilities
Redeemable convertible preferred stock warrant liability	$ 0	$ 75,843
Fair Value, Recurring
Assets
Total financial assets	254,716	109,703
Liabilities
Contingent earnout liability recognized upon acquisition of ViriCiti (ViriCiti Earnout)	5,993
Total financial liabilities	6,018	75,843
Fair Value, Recurring | Private Placement Warrants
Liabilities
Redeemable convertible preferred stock warrant liability	25
Fair Value, Recurring | Redeemable convertible preferred stock warrant
Liabilities
Redeemable convertible preferred stock warrant liability		75,843
Fair Value, Recurring | Money market funds
Assets
Money market funds	254,716	109,703
Fair Value, Recurring | Level 1
Assets
Total financial assets	254,716	109,703
Liabilities
Contingent earnout liability recognized upon acquisition of ViriCiti (ViriCiti Earnout)	0
Total financial liabilities	0	0
Fair Value, Recurring | Level 1 | Private Placement Warrants
Liabilities
Redeemable convertible preferred stock warrant liability	0
Fair Value, Recurring | Level 1 | Redeemable convertible preferred stock warrant
Liabilities
Redeemable convertible preferred stock warrant liability		0
Fair Value, Recurring | Level 1 | Money market funds
Assets
Money market funds	254,716	109,703
Fair Value, Recurring | Level 2
Assets
Total financial assets	0	0
Liabilities
Contingent earnout liability recognized upon acquisition of ViriCiti (ViriCiti Earnout)	0
Total financial liabilities	0	0
Fair Value, Recurring | Level 2 | Private Placement Warrants
Liabilities
Redeemable convertible preferred stock warrant liability	0
Fair Value, Recurring | Level 2 | Redeemable convertible preferred stock warrant
Liabilities
Redeemable convertible preferred stock warrant liability		0
Fair Value, Recurring | Level 2 | Money market funds
Assets
Money market funds	0	0
Fair Value, Recurring | Level 3
Assets
Total financial assets	0	0
Liabilities
Contingent earnout liability recognized upon acquisition of ViriCiti (ViriCiti Earnout)	5,993
Total financial liabilities	6,018	75,843
Fair Value, Recurring | Level 3 | Private Placement Warrants
Liabilities
Redeemable convertible preferred stock warrant liability	25
Fair Value, Recurring | Level 3 | Redeemable convertible preferred stock warrant
Liabilities
Redeemable convertible preferred stock warrant liability		75,843
Fair Value, Recurring | Level 3 | Money market funds
Assets
Money market funds	$ 0	$ 0