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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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