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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
 9 Months Ended 12 Months Ended
Sep. 30, 2019
Dec. 31, 2018
Dec. 31, 2017
Number of Shares      
Outstanding 18,964,867 18,629,867 18,101,367
Granted 1,122,500 720,000 1,770,000
Expired (3,838,600) (100,000) (772,500)
Forfeited (151,250) (85,000)
Exercised   (200,000) (469,000)
Outstanding 16,097,517 18,964,867 18,629,867
Exercisable 15,190,336 18,504,240  
Exercise Price      
Outstanding (Lower Limit) $ 0.57 $ 0.57 $ 0.57
Outstanding (Upper Limit) 1.69 1.69 1.69
Granted (Lower Limit) 0.64 1.07 0.60
Granted (Upper Limit) 1.05 1.27 1.50
Expired (Lower Limit) 0.95 0.90 0.68
Expired (Upper Limit) 1.25 0.90 1.69
Forfeited (Lower Limit) 0.77 0.92
Forfeited (Upper Limit) 1.50 1.22
Exercised (Lower Limit)   0.615 1.00
Exercised (Upper Limit)   1.00 1.25
Outstanding (Lower Limit) 0.57 0.57 0.57
Outstanding (Upper Limit) 1.69 1.69 1.69
Exercisable (Lower Limit) 0.57 0.57  
Exercisable (Upper Limit) 1.69 1.69  
Weighted Average Exercise Price      
Outstanding 0.91 0.90 0.90
Granted 0.83 1.19 0.97
Expired 1.13 0.90 0.98
Forfeited 0.91 0.96
Exercised   0.81 1.07
Outstanding 0.85 0.91 $ 0.90
Exercisable $ 0.85 $ 0.90