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STOCK OPTION PLAN AND WARRANTS (Tables)
12 Months Ended
Dec. 31, 2012
STOCK OPTION PLAN AND WARRANTS [Abstract]  
Summary of warrant activity
A summary of the status of the warrants issued by the Company as of December 31, 2012 and 2011 are as follows:
 
 
Year Ended
 
 
Year Ended
 
 
12/31/2012
 
 
12/31/2011
 
 
Number of
Warrants
 
 
Weighted
Average
Exercise
Price
 
 
Number of
Warrants
 
 
Weighted
Average
Exercise
Price
 
Outstanding at beginning of year
 
 
23,736,108
 
 
$
1.55
 
 
 
18,779,753
 
 
$
1.59
 
Granted
 
 
650,000
 
 
$
0.83
 
 
 
5,130,046
 
 
$
1.66
 
Exercised
 
 
(490,424
)
 
$
0.62
 
 
 
(56,489
)
 
$
0.06
 
Cashless Exercises
 
 
(335,541
)
 
$
0.91
 
 
 
-
 
 
 
 
 
Expired and Cancelled
 
 
(183,893
)
 
$
14.73
 
 
 
(117,202
)
 
$
13.72
 
 
 
23,376,250
 
 
 
 
 
 
 
23,736,108
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Outstanding, end of period
 
 
23,376,250
 
 
$
1.46
 
 
 
23,736,108
 
 
$
1.55
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Exercisable at end of period
 
 
23,376,250
 
 
$
1.46
 
 
 
23,736,108
 
 
$
1.55
 
Summary of the status of stock options
A summary of the status of stock options issued by the Company as of December 31, 2012 and 2011 are as follows:
 
 
12/31/2012
 
 
12/31/2011
 
 
 
 
 
Weighted
 
 
 
 
 
Weighted
 
 
Number
 
 
Average
 
 
Number
 
 
Average
 
 
of
 
 
Exercise
 
 
of
 
 
Exercise
 
 
Shares
 
 
Price
 
 
Shares
 
 
Price
 
Outstanding at beginning of year
 
 
5,645,202
 
 
$
1.10
 
 
 
3,484,833
 
 
$
1.26
 
Granted
 
 
2,354,275
 
 
$
0.80
 
 
 
2,298,702
 
 
$
1.02
 
Exercised
 
 
(230,600
)
 
$
1.09
 
 
 
-
 
 
$
-
 
Expired and Cancelled
 
 
(40,000
)
 
$
0.86
 
 
 
(138,333
)
 
$
3.69
 
Outstanding at end of period
 
 
7,728,877
 
 
$
1.01
 
 
 
5,645,202
 
 
$
1.10
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Exercisable at end of period
 
 
7,582,022
 
 
$
1.03
 
 
 
5,317,003
 
 
$
1.13
 
 
Stock option valuation assumptions
The fair value of each stock option granted is estimated on the date of grant using the Black-Scholes option valuation model.  This model uses the assumptions listed in the table below.  Expected volatilities are based on the historical volatility of the Company's stock.  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.
 
 
2012
 
 
2011
 
Weighted average fair value per option granted
 
$
0.38
 
 
$
0.97
 
Risk-free interest rate
 
 
0.34 - 0.42%
 
 
0.6 - 0.9%
Expected dividend yield
 
 
0.00
%
 
 
0.00
%
Expected lives
 
 
2.695
 
 
 
2.875 - 5
 
Expected volatility
 
 
97.72 - 103%
 
 
101 - 245%
Stock options outstanding by price range
Stock options outstanding at December 31, 2012 are as follows:
 
Weighted
Average
Weighted
Remaining
Average
Options
Contractual
Exercise
Options
Range of Exercise Prices
Outstanding
Life
Price
Exercisable
$0.01-$1.507,3838773.2$1.137,237,022
$1.51-$3.00210,0002.4$1.49210,000
$3.00-$5.00135,0005.3$3.11135,000
7,728,8773.61.027,582,022
 
Stock options outstanding at December 31, 2011 are as follows:
 
Weighted
Average
Weighted
Remaining
Average
Options
Contractual
Exercise
Options
Range of Exercise Prices
Outstanding
Life
Price
Exercisable
$0.01-$1.505,435,2023.9$1.185,107,003
$1.51-$3.00210,0002.0$1.49210,000
5,645,2024.01.135,317,003