Stock-Based Compensation - Non-cash stock-based compensation expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Stock-Based Compensation
Stock-based compensation expense	$ 989	$ 1,207	$ 2,067	$ 2,364
Research and development
Stock-Based Compensation
Stock-based compensation expense	244	494	497	967
General and administrative
Stock-Based Compensation
Stock-based compensation expense	$ 745	$ 713	$ 1,570	$ 1,397