Summary of Significant Accounting Policies - Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Summary of Significant Accounting Policies
Cash and cash equivalents	$ 46,687	$ 86,508	$ 146,920
Restricted cash	284		121
Total	$ 46,971	$ 86,629	$ 147,041	$ 25,051