Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Summary of Reconciliation of Cash and Restricted Cash (Detail)

v3.10.0.1
Summary of Significant Accounting Policies - Summary of Reconciliation of Cash and Restricted Cash (Detail) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Cash And Cash Equivalents [Abstract]        
Cash $ 13,560 $ 9,167 $ 23,685  
Restricted cash 505 292 238  
Total cash and restricted cash $ 14,065 $ 9,459 $ 23,923 $ 7,020