Accrued Expenses and Other Current Liabilities (Accrued Expenses and Other Current Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Accrued Expenses and Other Current Liabilities [Abstract]
Accrued payroll and benefits	$ 3,498	$ 1,501
Accrued External Research And Development	1,200	2,294
Accrued professional fees and other	1,055	692
Accrued interest	31	32
Total	$ 5,784	$ 4,519