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Restructuring - Narrative (Details) | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Sep. 30, 2024 employee | Sep. 30, 2023 employee | Apr. 30, 2025 USD ($) employee | Oct. 31, 2024 USD ($) | Oct. 31, 2023 USD ($) | Jan. 31, 2025 USD ($) | Jan. 31, 2024 USD ($)
September 2024 Reorganization |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Expected number of positions eliminated | employee | 249 |  |  |  |  |  |
Reduction in workforce (as a percent) | 15.00% |  |  |  |  |  |
Restructuring charges |  |  | $ 0 |  |  |  |
Remaining liabilities |  |  | $ 0 |  |  | $ 400,000 |
September 2024 Reorganization | Severance and employment-related termination costs |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Restructuring charges |  |  |  | $ 9,800,000 |  | 9,827,000 |
January 2024 Reorganization |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Expected number of positions eliminated | employee |  |  | 223 |  |  |  |
Reduction in workforce (as a percent) |  |  | 12.00% |  |  |  |
Restructuring charges |  |  | $ 0 |  |  |  | $ 12,654,000
Restructuring liabilities |  |  | 1,200,000 |  |  |  |
January 2024 Reorganization | Severance and employment-related termination costs |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Restructuring charges |  |  | 9,900,000 |  |  |  | 9,946,000
January 2024 Reorganization | Facility and other contract terminations |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Restructuring charges |  |  | 2,700,000 |  |  |  | 2,708,000
September 2023 Reorganization |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Expected number of positions eliminated | employee |  | 168 |  |  |  |  |
Reduction in workforce (as a percent) |  | 10.00% |  |  |  |  |
Restructuring charges |  |  |  |  | $ 15,600,000 |  | 15,601,000
Restructuring liabilities |  |  | 300,000 |  |  |  |
September 2023 Reorganization | Severance and employment-related termination costs |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  | 7,412,000
Restructuring liabilities |  |  | $ 100,000 |  |  |  |
September 2023 Reorganization | Facility and other contract terminations |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  | $ 8,189,000
Restructuring liabilities |  |  |  |  |  | $ 200,000 |

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