Quarterly report pursuant to Section 13 or 15(d)

Going Concern (Details)

v3.20.2
Going Concern (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Jun. 30, 2019
Dec. 31, 2018
Going Concern        
Accumulated deficit $ (242,289) $ (235,537)    
Cash and Cash Equivalents, at Carrying Value $ 8,059 $ 15,045 $ 21,712 $ 28,918