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Cash, Cash Equivalents, Restricted Cash and Marketable Securities - Reconciliation of Cash, Cash Equivalents and Restricted Cash (Detail) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Jun. 30, 2020
Dec. 31, 2019
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents [Abstract]        
Cash and cash equivalents $ 129,608 $ 32,073 $ 60,485 $ 39,884
Restricted cash 229 237 217 216
Total cash, cash equivalents and restricted cash shown in the condensed consolidated statements of cash flows $ 129,837 $ 32,310 $ 60,702 $ 40,100