Summary of Significant Accounting Policies - Reconciliation of Cash and Restricted Cash (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Restricted Cash and Cash Equivalents Items [Line Items]
Cash and cash equivalents	$ 99,295	$ 97,825
Restricted cash	8,850	9,492
Total cash, cash equivalents and restricted cash shown in the unaudited condensed consolidated statements of cash flows	108,145	107,317	$ 71,362	$ 52,065
Letter of Credit
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	8,850	$ 9,492
Initial Capitalization
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	$ 1,500