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)

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Summary of Significant Accounting Policies - Schedule of Reconciliation of Cash and Cash Equivalents, and Restricted Cash (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Mar. 31, 2019
Accounting Policies [Abstract]      
Cash and cash equivalents $ 43,565 $ 4,960 $ 26,616
Restricted cash 15 $ 15 15
Total cash, cash equivalents, and restricted cash shown in the statements of cash flows $ 43,580   $ 26,631