Stock-Based Compensation - Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Stock-based compensation expense
Total stock-based compensation expense	$ 3,454	$ 1,509	$ 6,607	$ 2,784
Research and development
Stock-based compensation expense
Total stock-based compensation expense	1,798	762	3,412	1,423
General and administrative
Stock-based compensation expense
Total stock-based compensation expense	$ 1,656	$ 747	$ 3,195	$ 1,361