Stock-Based Compensation - Stock-based compensation expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Stock-Based Compensation
Total stock-based compensation expense	$ 7,382	$ 8,424
Research and development expense
Stock-Based Compensation
Total stock-based compensation expense	2,189	2,427
General and administrative expense
Stock-Based Compensation
Total stock-based compensation expense	$ 5,193	$ 5,997