Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events (Details)

v3.19.1
Subsequent Events (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended
Apr. 25, 2019
May 13, 2019
Mar. 31, 2019
Mar. 31, 2018
Subsequent Event        
Shares of common stock issued     $ 3,226 $ 5,122
Subsequent Event        
Subsequent Event        
Shares of common stock issued (shares)   1,408,018    
Shares of common stock issued   $ 1,600    
Subsequent Event | April Offerings        
Subsequent Event        
Number of units sold (shares) 9,375,000      
Sale of common stock (in dollars per share) $ 1.60      
Sale of stock, number of shares per unit 1      
Warrants issued (per unit) 0.5      
Common stock offered for each warrant (in shares) 1      
Exercise price per warrant (in dollars per share) $ 1.75      
Warrant term 5 years      
Net proceeds from registered offering $ 15,000