Annual report pursuant to Section 13 and 15(d)

Basis of Presentation and Summary of Significant Accounting Policies - Schedule of Reconciliation of Cash, Cash Equivalents and Restricted Cash (Details)

v3.20.1
Basis of Presentation and Summary of Significant Accounting Policies - Schedule of Reconciliation of Cash, Cash Equivalents and Restricted Cash (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Accounting Policies [Abstract]      
Cash and cash equivalents $ 4,960 $ 125,298 $ 22,020
Restricted cash 15 15 15
Total cash, cash equivalents and restricted cash shown in the statements of cash flows $ 4,975 $ 125,313 $ 22,035