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Stockholders' Equity (Tables)
12 Months Ended
Dec. 31, 2017
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  7,145,000   7.51  $0.28   3,833,956  $0.31 
$0.66 - $0.79  30,000   6.04   0.79   30,000  $0.79 
$0.80 - $12.25  15,500   4.59   3.73   15,500  $3.73 
   7,190,500   7.50  $0.29         
Summary of stock option activity

 

  Options  Weighted Average 
  Outstanding  Exercise Price 
Balance, December 31, 2016  7,490,499  $0.29 
Granted  -   - 
Exercised  -   - 
Forfeited or expired  299,999   0.18 
Balance, December 31, 2017  7,190,500  $0.29