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Cash, Cash Equivalents, Restricted Cash and Marketable Securities - Reconciliation of Cash, Cash Equivalents and Restricted Cash (Detail) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Mar. 31, 2020
Dec. 31, 2019
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents [Abstract]        
Cash and cash equivalents $ 79,055 $ 32,073 $ 37,899 $ 39,884
Restricted cash 226 237 212 216
Total cash, cash equivalents and restricted cash shown in the condensed consolidated statements of cash flows $ 79,281 $ 32,310 $ 38,111 $ 40,100