XML 66 R53.htm IDEA: XBRL DOCUMENT v3.19.1
Warrant Liability (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Sep. 30, 2017
Jun. 30, 2017
Dec. 31, 2018
Dec. 31, 2017
Feb. 28, 2018
Jan. 25, 2018
May 31, 2017
May 24, 2017
Mar. 24, 2017
Class of Warrant or Right [Line Items]                  
Equity offering and private placement close date     2018-02            
Number of shares of common stock called by warrants           3,922,842   1,650,000 100,000
Number of shares of common stock called by each warrant           0.4      
Warrants exercise price per share           $ 1.55   $ 2.45 $ 2.25
Fair value of warrant liability     $ 1,497 $ 784          
Change in fair value of common stock warrant liability $ 405 $ (51) $ 2,194 $ 1,089          
Equity Offering and Private Placement [Member]                  
Class of Warrant or Right [Line Items]                  
Number of shares of common stock called by warrants         4,004,324        
Warrants exercise price per share         $ 1.55        
Warrants outstanding     3,974,324            
Fair value of warrant liability         $ 2,900        
2017 Offering [Member]                  
Class of Warrant or Right [Line Items]                  
Number of shares of common stock called by warrants             1,650,000    
Warrants exercise price per share             $ 1.65    
Fair value of warrant liability     $ 200       $ 800