Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events (Details)

v3.19.3.a.u2
Subsequent Events (Details) - USD ($)
$ in Thousands
 1 Months Ended 6 Months Ended
Feb. 07, 2020
Jan. 01, 2020
Feb. 08, 2020
Dec. 31, 2019
Dec. 31, 2018
Subsequent Event [Line Items]          
Exercise of warrants (in shares)   21,615,000   3,140,000  
Proceeds from exercise of warrants $ 5,400 $ 4,760   $ 691 $ 0
Series A Warrants [Member]          
Subsequent Event [Line Items]          
Exercise of warrants (in shares)   16,335,000   3,070,000  
Series B Warrants [Member]          
Subsequent Event [Line Items]          
Exercise of warrants (in shares)   5,280,000   70,000  
Subsequent Event [Member] | Underwritten Public Offering [Member]          
Subsequent Event [Line Items]          
Proceeds from exercise of warrants     $ 4,700    
Subsequent Event [Member] | Underwritten Public Offering [Member] | Series A Warrants [Member]          
Subsequent Event [Line Items]          
Exercise of warrants (in shares)     16,300,000    
Subsequent Event [Member] | Underwritten Public Offering [Member] | Series B Warrants [Member]          
Subsequent Event [Line Items]          
Exercise of warrants (in shares)     5,300,000    
Subsequent Event [Member] | Warrant [Member] | Underwritten Public Offering [Member]          
Subsequent Event [Line Items]          
Exercise of warrants (in shares)     21,600,000