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Share-based Compensation Plans - Narrative (Details) - USD ($) $ in Millions		1 Months Ended	3 Months Ended		12 Months Ended
	Dec. 15, 2025	Oct. 31, 2025	Apr. 30, 2026	Apr. 30, 2025	Jan. 31, 2026	Jan. 31, 2024	Jan. 31, 2022	Jan. 31, 2020
2019 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Forfeited (in shares)			1,005
2021 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved (in shares)			3,797,654
2021 Plan \| Common Class A
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, number of additional shares authorized (in shares)	3,899,439	6,130,499
Option Exchange Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Forfeited (in shares)						331,370
Granted (in shares)						132,546
Unrecognized compensation cost						$ 0.8
Stock option modification, incremental compensation expense			$ 0.0	$ 0.4
Employee Stock Option \| 2019 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award expiration period (in years)								10 years
Award vesting period (in years)								4 years
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)						2 years
Granted (in shares)			802,395
Unrecorded compensation expense			$ 14.0
Unrecognized compensation cost period for recognition (in years)			3 years 6 months
Restricted Stock Units (RSUs) \| 2021 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)		4 years					4 years
Restricted Stock Units (RSUs) \| 2021 Plan \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)					1 year
Restricted Stock Units (RSUs) \| 2021 Plan \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)					2 years
Restricted Stock Units (RSUs) \| Option Exchange Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecorded compensation expense			$ 0.0
Performance Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)			2,005,988		2,206,540
Share-based compensation arrangement by share-based payment award, award requisite service period (in years)					3 years
Award vesting rights (in percent)			200.00%