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Warrants
 12 Months Ended
Dec. 31, 2018
Warrants and Rights Note Disclosure [Abstract]  
Warrants

Note 6 – Warrants

 

The following table summarizes warrant activity for the year ended December 31, 2018:

 

    Number of
Warrants		     Weighted
Average
Exercise Price
Per Share		  
Outstanding and exercisable at December 31, 2017     2,505,771     $ 5.25  
Issued for extension of notes payable (Note 3)     —       —  
Issued for extension of line-of-credit (Note 3)     —       —  
Exercised/forfeited     (140,208 )     (5.74 )
                 
Outstanding and exercisable at December 31, 2018     2,365,563     $ 5.01  

 

The weighted average term of all outstanding common stock purchase warrants was 3.1 years as of December 31, 2018. The intrinsic value of all outstanding common stock purchase warrants and the intrinsic value of all vested common stock purchase warrants was zero as of December 31, 2018.