Accrued Expenses and Other Current Liabilities - Components of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Accrued Expenses and Other Current Liabilities [Line Items]
Total accrued expenses and other current liabilities	$ 11,329	$ 10,443
External Research and Development Expenses
Accrued Expenses and Other Current Liabilities [Line Items]
Total accrued expenses and other current liabilities	5,060	6,164
Personnel-related Expenses
Accrued Expenses and Other Current Liabilities [Line Items]
Total accrued expenses and other current liabilities	4,797	2,822
Professional Fees
Accrued Expenses and Other Current Liabilities [Line Items]
Total accrued expenses and other current liabilities	1,251	341
Deferred Offering Costs
Accrued Expenses and Other Current Liabilities [Line Items]
Total accrued expenses and other current liabilities		1,017
Other
Accrued Expenses and Other Current Liabilities [Line Items]
Total accrued expenses and other current liabilities	$ 221	$ 99