Annual report pursuant to Section 13 and 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
12 Months Ended
Dec. 31, 2020
USD ($)
Warrant liabilities  
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]  
Beginning balance $ 18,396
December 2020 Public Offering 29,478
Gain (loss) adjustment to fair value 3,282
Ending balance 51,156
Derivative liabilities  
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]  
Beginning balance 3,192
Bifurcated embedded conversion option associated with Notes 8,110
Adjustment for partial conversion of April 2020 Notes (2,690)
Gain (loss) adjustment to fair value (2,658)
Ending balance $ 5,954