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

September 30,

2020

(Unaudited)

   

December 31,

2019

 
    Number of Options     Weighted Average Exercise Price     Number of Options     Weighted Average Exercise Price  
Outstanding, beginning of period     77,500     $ 2.56       40,000     $ 4.16  
Granted     31,250       0.88       37,500       0.88  
Exercised     (2,500 )     0.40       -       -  
Expired     (5,000 )     16.8       -       -  
Outstanding, end of period     101,250     $ 1.38       77,500     $ 2.56  
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

 
                             
  $ 0.80       27,500       4.35       27,500     $ 0.80  
  $ 0.88       31,250       3.26       31,250     $ 0.88  
  $ 0.96       25,000       3.27       25,000     $ 0.96  
  $ 2.16       5,000       4.26       5,000     $ 2.16  
  $ 4.40       12,500       5.35       12,500     $ 4.40  
                                       
            101,250       3.87       101,250     $ 1.38  
Stock Warrants Outstanding
   

September 30,

2020

(Unaudited)

   

December 31,

2019

 
     Number of Warrants      Weighted Average Exercise Price      Number of Warrants      Weighted Average Exercise Price  
Outstanding, beginning of period     2,155,065     $ 3.12       3,318,826     $ 2.72  
Granted     210,447       1.36       162,500       0.88  
Exercised     (64,296 )     (2.84 )     -       -  
Expired     (614,583 )     (6.40 )     (1,326,261 )     (1.84 )
Outstanding, end of period     1,686,633     $ 1.73       2,155,065     $ 3.12  
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

 
  $ 0.64       31,250       3.15       31,250     $ 0.64  
  $ 0.80       158,125       3.01       158,125     $ 0.80  
  $ 0.96       473,958       2.19       473,958     $ 0.96  
  $ 1.12       6,250       3.55       6,250     $ 1.12  
  $ 1.20       175,000       4.13       175,000     $ 1.20  
  $ 1.36       1,250       2.07       1,250     $ 1.36  
  $ 2.16       31,250       1.25       31,250     $ 2.16  
  $ 2.32       523,061       1.41       523,061     $ 2.32  
  $ 2.40       150,000       0.39       150,000     $ 2.40  
  $ 2.56       31,250       1.00       31,250     $ 2.56  
  $ 3.36       31,250       0.75       31,250     $ 3.36  
  $ 4.00       60,000       4.85       60,000     $ 4.00  
  $ 4.40       12,500       0.33       12,500     $ 4.40  
  $ 8.40       1,488       2.88       1,488     $ 8.40  
            1,686,633       2.11       1,686,633     $ 1.73