Accrued Expenses And Current Portion Of Other Liabilities - Accrued Expenses (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Payables and Accruals [Abstract]
Accrued compensation	$ 3,702	$ 4,277
External research and development	4,023	7,694
Accrued outside services	1,055	945
Accrued taxes	0	40
Other accrued expenses	371	7
Total accrued expenses	$ 9,151	$ 12,963	[1]

[1] The balance sheet as of December 31, 2022 is derived from the audited financial statements as of that date.