Stock-Based Compensation - Compensation expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Stock-based compensation
Share-based compensation expense	$ 2,755	$ 1,794
Research and development expenses
Stock-based compensation
Share-based compensation expense	1,298	704
General and administrative expenses
Stock-based compensation
Share-based compensation expense	$ 1,457	$ 1,090