Accrued Expenses - Schedule of Accrued Expenses (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Payables and Accruals [Abstract]
Employee compensation and benefits	$ 6,867	$ 3,314
Professional fees	738	696
Research and development	3,573	1,797
Process development and manufacturing costs	7,685	1,550
Other	1,289	173
Total accrued expenses	$ 20,152	$ 7,530