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OPTIONS AND WARRANTS TO PURCHASE COMMON STOCK (Tables)
6 Months Ended
Jun. 30, 2020
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule Of Warrants Or Rights [Table Text Block]
A summary of the status and changes of the warrants issued for the six months ended June 30, 2020:
 
  Shares Issuable    
  upon Exercise of  Weighted Average 
  Outstanding Warrants  Exercise Price 
       
Outstanding at January 1, 2020  26,688,373  $0.15 
Issued  -   - 
Exercised  -     
Forfeited  -   - 
Outstanding at June 30, 2020  26,688,373  $0.15 
 
At June 30, 2020, the intrinsic value of the outstanding warrants was $0.
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
A summary of the status of the warrants outstandi
n
g and exercisable at June 30, 2020 is presented below:
 
   Warrants Outstanding and Exercisable 
   Shares Issuable  Weighted Average    
   upon Exercise of  Remaining  Weighted Average 
Exercise Price  Outstanding Warrants  Contractual Life (years)  Exercise Price 
$1.15   461,340   0.83  $1.15 
$0.25   3,283,283   0.99  $0.25 
$0.04   2,068,750   2.18  $0.04 
$0.10   11,000,000   2.45  $0.10 
$0.15   9,875,000   0.98  $0.15 
     26,688,373   1.68  $0.15 
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
A summary of the status and changes of the options granted under stock option plans and other agreements during the six mon
t
hs ended June 30, 2020:
 
 
 
Shares Issued
 
 
Weighted
 
 
 
Upon Exercise of
 
 
Average
 
 
 
Options
 
 
Exercise Price
 
       
Outstanding at December 31, 2019  60,676,568  $0.26 
Granted  -   - 
Exercised  -   - 
Forfeited  -   - 
Outstanding at June 30, 2020  60,676,568  $0.26 
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]
A summary of the status of the options outstanding at June 30, 2020 is presented below:
 
  Options Outstanding  Options Exercisable 
Range of per
share
exercise
price
 Shares  Weighted
average
remaining
contractual
life
  Per share
weighted
average
exercise
price
  Shares  Weighted
average
remaining
contractual
life
  Per share
weighted
average
exercise price
 
$0.04 - $0.08  42,403,623   7.18  $0.06   34,861,956   7.17  $0.06 
$0.10 - $0.84  13,330,885   2.43   0.42   13,330,885   2.43   0.42 
$1.10 - $1.90  4,942,060   2.22   1.63   4,942,060   2.22   1.63 
                         
   60,676,568   5.73  $0.26   53,134,901   5.52  $0.29