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Stockholders' Equity (Tables)
3 Months Ended
Mar. 31, 2018
Convertible Preferred Stock/ Stockholders' Equity [Abstract]  
Summary of stock options outstanding

     Weighted          
     Average  Weighted     Weighted 
     Remaining  Average     Average 
Range of Exercise Number  Contractual  Exercise  Options  Exercise 
Prices between Outstanding  Life  Price  Exercisable  Price 
$0.18 - $0.65  7,620,000   7.44  $0.28   4,196,314  $0.31 
$0.66 - $0.79  30,000   5.79   0.79   30,000  $0.79 
$0.80 - $12.25  15,500   4.34   3.73   15,500  $3.73 
   7,665,500   7.43  $0.29         

 

Summary of stock option activity
    Options     Weighted Average  
    Outstanding     Exercise Price  
Balance, December 31, 2017     7,190,500     $ 0.29  
Granted     575,000       0.29  
Exercised     -       -  
Forfeited or expired     (100,000 )     0.19  
Balance, March 31, 2018     7,665,500     $ 0.29