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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, 2020
Dec. 31, 2019
Mar. 31, 2019
Dec. 31, 2018
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents [Abstract]        
Cash and cash equivalents $ 37,899 $ 39,884 $ 112,133 $ 49,348
Restricted cash 212 216 615 619
Total cash, cash equivalents and restricted cash shown in the condensed consolidated statements of cash flows $ 38,111 $ 40,100 $ 112,748 $ 49,967