Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Reconciliation of Financial Liabilities Measured at Fair Value (Details)

v3.19.2
Fair Value Measurements - Reconciliation of Financial Liabilities Measured at Fair Value (Details)
$ in Thousands
 3 Months Ended
Jun. 30, 2019
USD ($)
Warrant liability  
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]  
March 31, 2019 $ 8,013
June 30, 2019 12,525
Warrant liability  
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]  
March 31, 2019 8,013
June 30, 2019 12,525
Level 3 | Warrant liability  
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]  
March 31, 2019 8,013
June 30, 2019 12,525
Level 3 | Warrant liability | Warrant liability  
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]  
March 31, 2019 8,013
Change in fair value of convertible note embedded derivative liability 5,226
De-recognition on exercises (714)
June 30, 2019 $ 12,525