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STOCK BASED COMPENSATION (Schedule of Stock Option and Warrant Outstanding and Exercisable) (Details) - Non Qualified Stock Options And Warrants [Member] - $ / shares
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Number of Shares    
Outstanding 18,964,867 18,629,867
Granted 1,327,500 720,000
Expired (3,838,600) (100,000)
Forfeited (151,250) (85,000)
Exercised   (200,000)
Outstanding 16,302,517 18,964,867
Exercisable 15,476,894  
Exercise Price    
Outstanding (Lower Limit) $ 0.57 $ 0.57
Outstanding (Upper Limit) 1.69 1.69
Granted (Lower Limit) 0.64 1.07
Granted (Upper Limit) 1.05 1.27
Expired (Lower Limit) 0.95 0.90
Expired (Upper Limit) 1.25 0.90
Forfeited (Lower Limit) 0.77 0.92
Forfeited (Upper Limit) 1.50 1.22
Exercised (Lower Limit)   0.615
Exercised (Upper Limit)   1.00
Outstanding (Lower Limit) 0.57 0.57
Outstanding (Upper Limit) 1.69 1.69
Exercisable (Lower Limit) 0.57  
Exercisable (Upper Limit) 1.69  
Weighted Average Exercise Price    
Outstanding 0.91 0.90
Granted 0.80 1.19
Expired 1.13 0.90
Forfeited 0.91 0.96
Exercised   0.81
Outstanding 0.85 $ 0.91
Exercisable $ 0.85