Summary of Significant Accounting Polices - Cash and Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Summary of Significant Accounting Policies
Cash and cash equivalents	$ 86,508	$ 24,930
Restricted cash	121	121
Total	$ 86,629	$ 25,051	$ 10,376