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Fair Value of Financial Assets and Liabilities - Summary of Changes in Fair Value of Derivative Liability (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2020
Fair Value Disclosures [Abstract]    
Initial fair value upon issuance of the private placement   $ 27,038
Adjustment to fair value $ 12 (1,667)
Balance at June 30, 2020 $ 25,371 $ 25,371