Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.3
Summary of Significant Accounting Policies - Schedule of Reconciliation of Cash and Cash Equivalents, and Restricted Cash (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Sep. 30, 2018
Accounting Policies [Abstract]      
Cash and cash equivalents $ 11,954 $ 125,298 $ 41,353
Restricted cash 15 $ 15 15
Total cash, cash equivalents, and restricted cash shown in the statements of cash flows $ 11,969   $ 41,368