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STOCK OPTION PLAN AND WARRANTS (Tables)
12 Months Ended
Dec. 31, 2015
STOCK OPTION PLAN AND WARRANTS [Abstract]  
Summary of the status of stock options
A summary of the status of stock options outstanding under the Plan as of December 31, 2015 and 2014 is as follows:
 
 
 
12/31/2015
  
12/31/2014
 
 
 
Number of
Shares
  
Weighted
Average
Exercise Price
  
Number of
Shares
  
Weighted
Average
Exercise
Price
 
Outstanding at beginning of year
  
11,033,675
  
$
1.05
   
9,583,762
  
$
1.16
 
Granted
  
6,299,600
  
$
0.29
   
2,372,800
  
$
0.58
 
Exercised
  
-
       
-
  
$
-
 
Expired and Cancelled
  
(6,230,000
)
 
$
0.77
   
(922,887
)
 
$
0.99
 
 
  
11,103,275
       
11,033,675
     
 
                
Outstanding, end of period
  
11,103,275
  
$
0.78
   
11,033,675
  
$
1.05
 
 
                
 
                
Exercisable at end of period
  
10,328,925
  
$
0.82
   
11,033,675
  
$
1.05
 
Stock option valuation assumptions
The risk-free rate for periods within the expected life of the option is based on the U.S. Treasury yield curve in effect at the time of grant.
 
 
12/31/2015
 
12/31/2014
Weighted average fair value per option granted
$0.14 - $0.36
 
$0.31 - $0.50
Risk-free interest rate
1.00% - 1.54%
 
0.86 - 1.75%
Expected dividend yield
0.00%
 
0.00%
Expected lives
2.688 - 3.000
 
2.6875
Expected volatility
86.22% - 120.51%
 
82.11 - 98.91%
Summary of warrant activity
The summary of the status of the warrants issued by the Company as of December 31, 2015 and 2014 are as follows:
 
 
 
12/31/2015
  
12/31/2014
 
 
 
Number of
Warrants
  
Weighted
Average
Exercise Price
  
Number of
Warrants
  
Weighted
Average
Exercise Price
 
Outstanding at beginning of year
  
16,446,351
  
$
1.45
   
16,688,265
  
$
1.44
 
Granted
  
87,825,204
  
$
0.42
   
-
  
$
-
 
Exercised
  
(53,095,204
)
 
$
0.66
   
-
  
$
-
 
Cashless Exercises
  
-
   
-
   
-
  
$
-
 
Expired and Cancelled
  
(218,571
)
 
$
0.66
   
(241,914
)
 
$
0.87
 
 
  
50,957,780
  
$
0.52
   
16,446,351
   
-
 
 
                
Outstanding, end of period
  
50,957,780
  
$
0.52
   
16,446,351
  
$
1.44
 
 
                
Exercisable at end of period
  
50,957,780
  
$
0.52
   
16,446,351
  
$
1.44