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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
Mar. 31, 2020
Dec. 31, 2019
Mar. 31, 2019
Cash And Cash Equivalents [Abstract]      
Cash and cash equivalents $ 69,815 $ 67,904 $ 75,012
Restricted cash, current $ 787   208
Restricted Cash, Current, Asset, Statement of Financial Position [Extensible List] us-gaap:PrepaidExpenseAndOtherAssetsCurrent    
Restricted cash, non-current $ 38   1,148
Restricted Cash, Noncurrent, Asset, Statement of Financial Position [Extensible List] us-gaap:OtherAssetsNoncurrent    
Cash, cash equivalents and restricted cash shown in statement of cash flows $ 70,640   $ 76,368