Interim Consolidated Financial Statements - Summary of End-of-period Cash and Cash Equivalents and Cash, Cash Equivalents and Restricted Cash from Financial Statements (Detail) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020
Cash And Cash Equivalents [Abstract]
Cash and cash equivalents	$ 146,387	$ 90,257	$ 68,377
Restricted cash, current	$ 221		$ 787
Restricted Cash, Current, Asset, Statement of Financial Position [Extensible List]	us-gaap:PrepaidExpensesAndOtherCurrentAssetsMember		us-gaap:PrepaidExpensesAndOtherCurrentAssetsMember
Restricted cash, non-current	$ 2,319		$ 37
Restricted Cash, Noncurrent, Asset, Statement of Financial Position [Extensible List]	Other assets		Other assets
Cash, cash equivalents and restricted cash shown in statement of cash flows	$ 148,927		$ 69,201