Accrued Expenses (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Accrued Expenses
Accrued preclinical and clinical trial costs	$ 15,951	$ 1,260
Accrued compensation	1,106	1,059
Accrued consulting	108	77
Accrued professional services	413	499
Accrued other	220	246
Total accrued expenses	$ 17,798	$ 3,141