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Equity Plans and Stock-based Compensation - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions |  | 12 Months Ended |
--- | --- | --- | ---
Feb. 25, 2021 | Jan. 31, 2026 | Jan. 31, 2025 | Jan. 31, 2024 | Jan. 31, 2023 | Jan. 15, 2026
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Unrecognized stock-based compensation cost not yet recognized |  | $ 50.2 |  |  |  |
Period for recognition (in years) |  | 2 years 1 month 6 days |  |  |  |
2021 Equity Incentive Plan |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Possible increase in percent of outstanding shares (as a percent) | 1.00% |  |  |  |  |
Number of additional shares allowable under the plan (in shares) | 270,000 |  |  |  |  |
Percent of outstanding shares (as a percent) | 5.00% |  |  |  |  |
2021 Stock Option Plan |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Total shares of common stock reserved (in shares) |  | 1,000,234 |  |  |  |
Number of stock options granted (in shares) |  | 0 |  |  |  |
2026 Inducement Plan |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Shares available for grant under inducement plan (in shares) |  |  |  |  |  | 300,000
Total shares of common stock reserved (in shares) |  | 300,000 |  |  |  |
2017 Stock Plan |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Total shares of common stock reserved (in shares) |  | 98,783 |  |  |  |
2007 Stock Plan |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Total shares of common stock reserved (in shares) |  | 19,973 |  |  |  |
Employee stock purchase plan |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Eligible compensation per employee (as a percent) | 15.00% |  |  |  |  |
Offering period (in months) | 24 months |  |  |  |  |
Purchase period (in months) | 6 months |  |  |  |  |
Purchase price of common stock, percent of fair value | 85.00% |  |  |  |  |
Maximum number of shares to be purchased per employee (in shares) | 500 |  |  |  |  |
Total shares of common stock reserved (in shares) |  |  | 751,149 |  |  |
Shares purchased (in shares) |  | 194,034 | 151,664 |  | 63,265 |
Price per share (USD per share) |  | $ 10.77 | $ 28.41 | $ 130.81 |  |
Proceeds from shares purchased |  | $ 2.1 | $ 4.3 | $ 8.3 |  |
Dividend rate |  | 0.00% | 0.00% | 0.00% |  |
Restricted stock units |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Fair value of awards vested |  | $ 57.2 | $ 74.6 | $ 84.5 |  |
Granted (in shares) |  | 1,971,733 |  |  |  |
Performance Restricted Stock Units |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Dividend rate |  | 0.00% | 0.00% | 0.00% |  |
Granted (in shares) |  | 0 |  |  |  |
Performance Restricted Stock Units | 2021 Equity Incentive Plan | Minimum |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Vesting period (in years) |  | 4 years |  |  |  |
Performance Restricted Stock Units | 2021 Equity Incentive Plan | Maximum |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Vesting period (in years) |  | 5 years |  |  |  |
Options to purchase common stock | 2017 Stock Plan |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Grant date fair value |  | $ 0.0 | $ 0.2 | $ 46.3 |  |

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