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Stock-based Compensation (Details) - USD ($) $ in Thousands			3 Months Ended		9 Months Ended
Stock-based Compensation (Details) - USD ($) $ in Thousands	Jun. 06, 2024	Oct. 22, 2019	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023	Dec. 31, 2022
Stock-based compensation
Rollover options outstanding (in shares)			16,576,193	13,017,416	16,576,193	13,017,416	13,032,541	13,123,170
Stock-based compensation expense			$ 7,903	$ 2,207	$ 47,400	$ 6,505
Stock Incentive Plan 2019
Stock-based compensation
Maximum shares issuable		9,900,000
Contractual term (in years)		10 years
Vesting period of options with a service condition (in years)		5 years
Vesting percentage of options with a service condition (in percent)		20.00%
Rollover options outstanding (in shares)		3,400,000
Equity Incentive Plan 2024
Stock-based compensation
Maximum shares issuable	10,000,000
Vesting period of options with a service condition (in years)	5 years
Vesting percentage of options with a service condition (in percent)	20.00%
Common stock, capital shares reserved for future issuance			4,700,000		4,700,000
Percentage of outstanding stock maximum	5.00%
Equity Incentive Plan 2024 \| Maximum \| Restricted Stock Units (RSUs)
Stock-based compensation
Vesting period of options with a service condition (in years)	5 years
Vesting percentage of options with a service condition (in percent)	25.00%
Equity Incentive Plan 2024 \| Minimum \| Restricted Stock Units (RSUs)
Stock-based compensation
Vesting period of options with a service condition (in years)	4 years
Vesting percentage of options with a service condition (in percent)	20.00%
Employee Stock Purchase Plan 2024
Stock-based compensation
Common stock, capital shares reserved for future issuance	3,250,000
Shares available for future grant (in shares)	27,000,000
Percentage of outstanding stock maximum	1.00%
Shares issued in period					0