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Common Stock and Warrant Issuances (Tables)
12 Months Ended
Dec. 31, 2018
Equity [Abstract]  
Summary of Warrant Outstanding

The following table summarizes information about shares issuable under warrants outstanding during the year ended December 31, 2018:

 

    Warrant
shares
outstanding
    Weighted
average
exercise price
    Weighted average remaining life     Intrinsic value  
Outstanding at January 1, 2018     13,720,742     $ 1.49                  
Issued     -                          
Additional warrants issued for trigger of anti-dilution protection     1,000,000     $ 0.40                  
Exercised     (5,579,530 )   $ 0.91                  
Expired or cancelled     (3,663,237 )   $ 0.56                  
Outstanding at December 31, 2018     5,477,975     $ 1.01       1.37     $ -  
                                 
Exercisable at December 31, 2018     5,477,975     $ 1.01       1.37     $ -