Quarterly report pursuant to Section 13 or 15(d)

Fair Value of Warrants - Summary of Derivative Warrant Activity (Details)

v3.20.1
Fair Value of Warrants - Summary of Derivative Warrant Activity (Details) - 2016 Offerings
$ in Thousands
3 Months Ended
Mar. 31, 2020
USD ($)
Class of Warrants Outstanding [Roll Forward]  
Fair value of warrants outstanding as of December 31, 2019 $ 178
Change in fair value of warrants (127)
Fair value of warrants outstanding as of March 31, 2020 $ 51