Restructuring - Schedule of Restructuring Charges (Details) - USD ($) $ in Thousands	1 Months Ended	9 Months Ended	12 Months Ended
	Jan. 31, 2024	Oct. 31, 2024	Jan. 31, 2026	Jan. 31, 2025	Jan. 31, 2024
Restructuring Cost and Reserve [Line Items]
Restructuring Incurred Cost Statement Of Income Or Comprehensive Income Extensible Enumeration Not Disclosed Flag			statement of operations
January 2024 Reorganization
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 0		$ 12,654
September 2023 Reorganization
Restructuring Cost and Reserve [Line Items]
Restructuring charges				$ 15,601	15,600
Cost of revenue \| January 2024 Reorganization
Restructuring Cost and Reserve [Line Items]
Restructuring charges					632
Cost of revenue \| September 2023 Reorganization
Restructuring Cost and Reserve [Line Items]
Restructuring charges				996
Research and development \| January 2024 Reorganization
Restructuring Cost and Reserve [Line Items]
Restructuring charges					7,540
Research and development \| September 2023 Reorganization
Restructuring Cost and Reserve [Line Items]
Restructuring charges				4,183
Sales and marketing \| January 2024 Reorganization
Restructuring Cost and Reserve [Line Items]
Restructuring charges					500
Sales and marketing \| September 2023 Reorganization
Restructuring Cost and Reserve [Line Items]
Restructuring charges				1,343
General and administrative \| January 2024 Reorganization
Restructuring Cost and Reserve [Line Items]
Restructuring charges					3,982
General and administrative \| September 2023 Reorganization
Restructuring Cost and Reserve [Line Items]
Restructuring charges				9,079
Severance and employment-related termination costs \| September 2024 Reorganization
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 9,800	9,827
Severance and employment-related termination costs \| January 2024 Reorganization
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 9,900				9,946
Severance and employment-related termination costs \| September 2023 Reorganization
Restructuring Cost and Reserve [Line Items]
Restructuring charges				7,412
Severance and employment-related termination costs \| Cost of revenue \| September 2024 Reorganization
Restructuring Cost and Reserve [Line Items]
Restructuring charges			961
Severance and employment-related termination costs \| Cost of revenue \| January 2024 Reorganization
Restructuring Cost and Reserve [Line Items]
Restructuring charges					632
Severance and employment-related termination costs \| Cost of revenue \| September 2023 Reorganization
Restructuring Cost and Reserve [Line Items]
Restructuring charges				996
Severance and employment-related termination costs \| Research and development \| September 2024 Reorganization
Restructuring Cost and Reserve [Line Items]
Restructuring charges			2,867
Severance and employment-related termination costs \| Research and development \| January 2024 Reorganization
Restructuring Cost and Reserve [Line Items]
Restructuring charges					7,540
Severance and employment-related termination costs \| Research and development \| September 2023 Reorganization
Restructuring Cost and Reserve [Line Items]
Restructuring charges				4,183
Severance and employment-related termination costs \| Sales and marketing \| September 2024 Reorganization
Restructuring Cost and Reserve [Line Items]
Restructuring charges			5,066
Severance and employment-related termination costs \| Sales and marketing \| January 2024 Reorganization
Restructuring Cost and Reserve [Line Items]
Restructuring charges					500
Severance and employment-related termination costs \| Sales and marketing \| September 2023 Reorganization
Restructuring Cost and Reserve [Line Items]
Restructuring charges				1,343
Severance and employment-related termination costs \| General and administrative \| September 2024 Reorganization
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 933
Severance and employment-related termination costs \| General and administrative \| January 2024 Reorganization
Restructuring Cost and Reserve [Line Items]
Restructuring charges					1,274
Severance and employment-related termination costs \| General and administrative \| September 2023 Reorganization
Restructuring Cost and Reserve [Line Items]
Restructuring charges				890
Facility and other contract terminations \| January 2024 Reorganization
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 2,700				2,708
Facility and other contract terminations \| September 2023 Reorganization
Restructuring Cost and Reserve [Line Items]
Restructuring charges				8,189
Facility and other contract terminations \| Cost of revenue \| January 2024 Reorganization
Restructuring Cost and Reserve [Line Items]
Restructuring charges					0
Facility and other contract terminations \| Cost of revenue \| September 2023 Reorganization
Restructuring Cost and Reserve [Line Items]
Restructuring charges				0
Facility and other contract terminations \| Research and development \| January 2024 Reorganization
Restructuring Cost and Reserve [Line Items]
Restructuring charges					0
Facility and other contract terminations \| Research and development \| September 2023 Reorganization
Restructuring Cost and Reserve [Line Items]
Restructuring charges				0
Facility and other contract terminations \| Sales and marketing \| January 2024 Reorganization
Restructuring Cost and Reserve [Line Items]
Restructuring charges					0
Facility and other contract terminations \| Sales and marketing \| September 2023 Reorganization
Restructuring Cost and Reserve [Line Items]
Restructuring charges				0
Facility and other contract terminations \| General and administrative \| January 2024 Reorganization
Restructuring Cost and Reserve [Line Items]
Restructuring charges					$ 2,708
Facility and other contract terminations \| General and administrative \| September 2023 Reorganization
Restructuring Cost and Reserve [Line Items]
Restructuring charges				$ 8,189