Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity (Deficit) - Warrant activity (Details)

v3.21.1
Stockholders' Equity (Deficit) - Warrant activity (Details) - Warrant [Member] - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Number of Units and Awards, Unvested Beginning Balance 16,454  
Warrants, Exercise (613)  
Number of Units and Awards, Unvested Ending Balance 15,841  
Weighted Average Exercise Price, Outstanding $ 0.6079  
Weighted Average Exercise Price, Exercised 0.0001  
Weighted Average Exercise Price, Outstanding $ 0.6315  
Aggregate Intrinsic Value $ 84 $ 148