Annual report pursuant to Section 13 and 15(d)

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

v3.20.1
Summary of Significant Accounting Policies - Schedule of Reconciliation of Cash, 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 $ 14,951 $ 24,182 $ 51,033  
Restricted cash     13  
Total cash, cash equivalents and restricted cash shown in the statements of cash flows $ 14,951 $ 24,182 $ 51,046 $ 9,760