Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Statements of Stockholders' Equity (Deficit) (Parenthetical)

v3.19.2
Condensed Consolidated Statements of Stockholders' Equity (Deficit) (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
2019 Public Offering        
Stock offering transaction cost $ 1,683      
January 2019 Public Offering        
Stock offering transaction cost     $ 739  
May 2019 Public Offering        
Stock offering transaction cost     $ 1,683  
2018 Public Offering        
Stock offering transaction cost   $ 2,096   $ 2,096
Over-Allotment Option        
Overallotment related to transaction cost       $ 10