Quarterly report pursuant to Section 13 or 15(d)

Warrant derivative liability, Fair value of warrant derivative liability (Details)

v3.20.1
Warrant derivative liability, Fair value of warrant derivative liability (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Warrant Derivative Liability [Abstract]      
Balance as of December 31, 2019 $ 2,220    
Change in fair value of derivative liability (1,379) $ 0 $ (1,379)
Balance as of March 31, 2020 $ 841   $ 2,220