Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Accrued Expenses and Other Current Liabilities
Compensation and related benefits	$ 4,493	$ 4,976
Third-party and professional fees	2,442	2,233
Amounts due to contract manufacturer	2,188	842
Current portion of operating lease liabilities	336
Research and development expenses	107	31
Other	114	79
Total accrued expenses and other current liabilities	9,680	$ 8,161
Accrued milestone payment	$ 1,000