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Reconciliation of Cash and Cash Equivalents and Restricted Cash (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Accounting Policies [Abstract]        
Cash and cash equivalents presented in the consolidated balance sheets $ 50,443 $ 39,620    
Restricted cash 2,505      
Cash, cash equivalents and restricted cash presented in the consolidated statements of cash flows $ 52,948 $ 39,620 $ 103,172 $ 177,187