Commitments and Contingent Liabilities - Operating Leases (Details) $ in Thousands	1 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($) item	Dec. 31, 2022 USD ($)	Sep. 30, 2024 USD ($)	Jan. 31, 2023 USD ($)	Aug. 31, 2022 USD ($) ft²	Jan. 31, 2022 ft²	Dec. 31, 2021 ft²
Commitments and Contingent Liabilities
Lease space | ft²							55,000	12,000	14,000
Loss on abandonment of right-of-use assets	$ 600	$ 645
Tenant improvement allowance provided by lessor			$ 17,200
Tenant improvement allowance received			$ 16,700	$ 500
Lease liability					$ 31,098	$ 14,100
Future lease payments					$ 49,592	37,900
Gross fixed payments						54,600
Lease incentives receivable						$ 16,700	$ 16,700
Weighted-average incremental borrowing rate			11.40%		11.40%	11.40%
Renewal term							3 years
Letters of credit on leases			$ 1,100		$ 1,000
Number of Letter of Credits on Lease Held | item			2