Annual report pursuant to Section 13 and 15(d)

Consolidated Statements of Stockholders' Equity (Deficit) (Parentheticals)

v3.20.4
Consolidated Statements of Stockholders' Equity (Deficit) (Parentheticals) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
January 2019 Public Offering [Member]    
Common stock issued, transaction costs   $ 739
May 2019 Public Offering [Member]    
Common stock issued, transaction costs   $ 1,683
ATM [Member]    
Common stock issued, transaction costs $ 216