Quarterly report pursuant to Section 13 or 15(d)

Warrants (Details)

v3.19.1
Warrants (Details) - $ / shares
3 Months Ended
Mar. 31, 2019
Jan. 31, 2019
Series B [Member]    
Summarizes information about warrants outstanding and exercisable    
Grant Date [1] Jan. 27, 2014  
Number of Shares Underlying Warrants Originally Granted [1] 157,846  
Shares Underlying Warrants Exchanged, Exercised or Expired [1] (157,846)  
Shares Underlying Warrants Outstanding and Exercisable [1]  
Exercise price [1]  
Expiration Term in years [1] 0 years  
Series C [Member]    
Summarizes information about warrants outstanding and exercisable    
Grant Date [2] Nov. 19, 2014  
Number of Shares Underlying Warrants Originally Granted [2] 145,399  
Shares Underlying Warrants Exchanged, Exercised or Expired [2] (142,957)  
Shares Underlying Warrants Outstanding and Exercisable [2] 2,442  
Exercise price [2] $ 12.00  
Expiration Term in years [2] 9 months  
Repricing Series C [Member]    
Summarizes information about warrants outstanding and exercisable    
Grant Date [2] Nov. 19, 2014  
Number of Shares Underlying Warrants Originally Granted [2]  
Shares Underlying Warrants Exchanged, Exercised or Expired [2] 142,957  
Shares Underlying Warrants Outstanding and Exercisable [2] 142,957  
Exercise price [2] $ 9.00  
Expiration Term in years [2] 9 months  
Repricing Series E [Member]    
Summarizes information about warrants outstanding and exercisable    
Grant Date [2] Nov. 19, 2014  
Number of Shares Underlying Warrants Originally Granted [2]  
Shares Underlying Warrants Exchanged, Exercised or Expired [2] 142,957  
Shares Underlying Warrants Outstanding and Exercisable [2] 142,957  
Exercise price [2] $ 9.00  
Expiration Term in years [2] 9 months  
Rens [Member]    
Summarizes information about warrants outstanding and exercisable    
Grant Date [3] Mar. 03, 2016  
Number of Shares Underlying Warrants Originally Granted [3] 375,000  
Shares Underlying Warrants Exchanged, Exercised or Expired [3]  
Shares Underlying Warrants Outstanding and Exercisable [3] 375,000  
Exercise price [3] $ 7.00  
Expiration Term in years [3] 9 months  
Warrant [Member]    
Summarizes information about warrants outstanding and exercisable    
Number of Shares Underlying Warrants Originally Granted 678,245  
Shares Underlying Warrants Exchanged, Exercised or Expired (14,889)  
Shares Underlying Warrants Outstanding and Exercisable   663,356
[1] Issued in connection with the January 27, 2014 private placement transaction and which expired in January 2019.
[2] Issued in connection with the November 19, 2014 registered-direct public offering, and subsequently revised pursuant to Warrant Exercise Agreements entered into on May 18, 2015.
[3] Shares issued pursuant to the closing of the first tranche of the financing with RENS Technology Inc.