Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Summary of Reconciliation of Beginning and Ending Balances for Liabilities Measured at Fair Value on Recurring Basis (Details)

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Fair Value Measurements - Summary of Reconciliation of Beginning and Ending Balances for Liabilities Measured at Fair Value on Recurring Basis (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2020
USD ($)
Warrant liability  
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]  
Beginning balance $ 18,396
Gain adjustment to fair value (4,768)
Ending balance 13,628
Derivative liability  
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]  
Beginning balance 3,192
Gain adjustment to fair value (700)
Ending balance $ 2,492