Accrued Expenses - Schedule of Accrued Expenses (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Accrued Liabilities Current [Abstract]
Accrued payroll and other employee benefits	$ 2,511	$ 1,870
Clinical studies	2,627	493
Other accruals	245	307
Preclinical studies	432	72
Accrued interest	71	71
Total accrued expenses	$ 5,886	$ 2,813