Quarterly report pursuant to Section 13 or 15(d)

Basis of presentation, principles of consolidation and significant accounting policies - Fair Value Measurement (Details)

v3.20.1
Basis of presentation, principles of consolidation and significant accounting policies - Fair Value Measurement (Details) - Fair Value, Inputs, Level 3
$ in Thousands
3 Months Ended
Mar. 31, 2020
USD ($)
Warrant Liability Current  
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]  
Balance, beginning of period $ 0
Issuances of warrants 0
Change in fair value - net 0
Balance, end of period 0
Warrant Liability Long-Term  
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]  
Balance, beginning of period 5,818
Issuances of warrants 4,724
Change in fair value - net (3,845)
Balance, end of period 6,697
Warrant Liability Total  
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]  
Balance, beginning of period 5,818
Issuances of warrants 4,724
Change in fair value - net (3,845)
Balance, end of period $ 6,697