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10. SHAREHOLDERS' EQUITY (Tables)
3 Months Ended
Mar. 31, 2020
Stockholders' Equity:  
Summary of stock options outstanding
   

March 31, 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     -       -       -       -  
Expired     (40,000 )     2.10              
Outstanding, end of period     830,000     $ 0.17       620,000     $ 0.32  
Options outstanding and exercisable by price range
  Outstanding Options    

Average

Weighted

    Exercisable Options  
  Range     Number    

Remaining

Contractual

Life in Years

    Number    

Weighted

Average

Exercise Price

 
                             
  $ 0.05       20,000       0.77       20,000     $ 0.05  
  $ 0.10       220,000       4.85       220,000     $ 0.10  
  $ 0.11       250,000       3.76       250,000     $ 0.11  
  $ 0.12       200,000       3.77       200,000     $ 0.12  
  $ 0.27       40,000       4.76       40,000     $ 0.27  
  $ 0.55       100,000       5.85       100,000     $ 0.55  
                                       
            830,000       4.28       830,000     $ 0.17  
Summary of stock warrants outstanding
   

March 31, 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     1,441,667       0.12       1,300,000       0.11  
Exercised     (83,333 )     (0.69 )     -       -  
Expired     (1,799,999 )     (0.47 )     (10,610,088 )     (0.23 )
Outstanding, end of period     16,798,858     $ 0.36       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       3.65       250,000     $ 0.08  
  $ 0.10       1,265,000       3.51       1,265,000     $ 0.10  
  $ 0.12       3,791,667       2.69       3,791,667     $ 0.12  
  $ 0.14       50,000       4.05       50,000     $ 0.14  
  $ 0.15       1,400,000       4.63       1,400,000     $ 0.15  
  $ 0.17       10,000       2.57       10,000     $ 0.17  
  $ 0.27       250,000       1.75       250,000     $ 0.27  
  $ 0.29       4,615,525       1.91       4,615,525     $ 0.29  
  $ 0.30       1,200,000       0.89       1,200,000     $ 0.30  
  $ 0.32       250,000       1.50       250,000     $ 0.32  
  $ 0.42       250,000       1.25       250,000     $ 0.42  
  $ 0.50       250,000       1.00       250,000     $ 0.50  
  $ 0.55       100,000       0.83       100,000     $ 0.55  
  $ 0.69       116,666       0.10       116,666     $ 0.69  
  $ 1.00       3,000,000       0.09       3,000,000     $ 1.00  
            16,798,858       2.01       16,798,858     $ 0.36