Accrued Expenses & Other Current Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Accrued expenses and other current liabilities:
Accrued compensation and benefits	$ 15,881	$ 15,207
Accrued consulting and professional fees	5,007	2,645
Accrued research and development	2,262	2,222
Accrued revenue reserves	85,381	66,552
Accrued other	3,810	4,097
Total accrued expenses and other current liabilities	$ 112,341	$ 90,723