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)

v3.19.3
Fair Value Measurements - Summary of Reconciliation of Beginning and Ending Balances for Liabilities Measured at Fair Value on Recurring Basis (Details)
$ in Thousands
9 Months Ended
Sep. 30, 2019
USD ($)
Warrant liabilities  
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]  
Beginning balance $ 986
Gain (loss) adjustment to fair value 2,643
Ending balance 3,629
Derivative liability  
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]  
Beginning balance 0
Bifurcated embedded conversion option associated with Notes 6,960
Gain (loss) adjustment to fair value (768)
Adjustment for April 2019 conversion of Notes (1,656)
Ending balance $ 4,536