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11. SHAREHOLDERS' EQUITY (Tables)
6 Months Ended
Jun. 30, 2020
Stockholders' Equity:  
Stock Options Outstanding
   

June 30, 2020

(Unaudited)

    December 31, 2019  
    Number of Options     Weighted Average Exercise Price     Number of Options     Weighted Average Exercise Price  
Outstanding, beginning of period     620,000     $ 0.32       320,000     $ 0.52  
Granted     250,000       0.11       300,000       0.11  
Exercised     (20,000 )     0.05       -       -  
Expired     (40,000 )     2.10       -       -  
Outstanding, end of period     810,000     $ 0.17       620,000     $ 0.32  
Options Outstanding and Exercisable by Price Range
  Outstanding Options     Exercisable Options  
  Range     Number  

Average

Weighted

Remaining

Contractual

Life in Years

    Number    

Weighted

Average

Exercise Price

 
                           
  $ 0.10       220,000     4.60       220,000     $ 0.10  
  $ 0.11       250,000     3.51       250,000     $ 0.11  
  $ 0.12       200,000     3.52       200,000     $ 0.12  
  $ 0.27       40,000     4.51       40,000     $ 0.27  
  $ 0.55       100,000     5.60       100,000     $ 0.55  
            810,000     4.12       810,000     $ 0.17  
Stock Warrants Outstanding
   

June 30, 2020

(Unaudited)

    December 31, 2019  
     Number of Warrants      Weighted Average Exercise Price      Number of Warrants      Weighted Average Exercise Price  
Outstanding, beginning of period     17,240,523     $ 0.39       26,550,611     $ 0.34  
Granted     1,671,667       0.17       1,300,000       0.11  
Exercised     (298,850 )     (0.40 )     -       -  
Expired     (4,916,665 )     (0.80 )     (10,610,088 )     (0.23 )
Outstanding, end of period     13,696,675     $ 0.22       17,240,523     $ 0.39  
Warrants Outstanding and Exercisable by Price Range
  Outstanding Warrants     Exercisable Warrants  
  Exercise Price     Number    

Average Weighted

Remaining Contractual

Life in Years

    Number    

Weighted Average

Exercise Price

 
  $ 0.08       250,000       3.40       250,000     $ 0.08  
  $ 0.10       1,265,000       3.26       1,265,000     $ 0.10  
  $ 0.12       3,791,667       2.44       3,791,667     $ 0.12  
  $ 0.14       50,000       3.80       50,000     $ 0.14  
  $ 0.15       1,400,000       4.38       1,400,000     $ 0.15  
  $ 0.17       10,000       2.32       10,000     $ 0.17  
  $ 0.27       250,000       1.50       250,000     $ 0.27  
  $ 0.29       4,400,008       1.66       4,400,008     $ 0.29  
  $ 0.30       1,200,000       0.64       1,200,000     $ 0.30  
  $ 0.32       250,000       1.25       250,000     $ 0.32  
  $ 0.42       250,000       1.00       250,000     $ 0.42  
  $ 0.50       480,000       5.10       480,000     $ 0.50  
  $ 0.55       100,000       0.58       100,000     $ 0.55  
            13,696,675       2.35       13,696,675     $ 0.22