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6. WARRANT LIABILITY
9 Months Ended
Sep. 28, 2012
Notes to Financial Statements  
Note 7 - WARRANT LIABILITY

The following warrants for our common stock were issued and outstanding for the period ending September 28, 2012 and December 30, 2011, respectively:

 

    September 28, 2012     December 30, 2011  
Warrants outstanding at beginning of period     12,137,803       14,887,803  
Exercised     -       (2,750,000 )
Warrants outstanding at end of period     12,137,803       12,137,803  

 

A detail of warrants outstanding September 28, 2012 is as follows:

 

    Number of Warrants   Expiration Date
Exercisable at $1.25 per share     6,312,803   6/20/2013
Exercisable at $1.50 per share     250,000   4/14/2012
Exercisable at $0.08 per share     4,200,000   4/1/2014
Exercisable at between $0.32 and $1.00 per share     1,375,000   4/15/13 to 4/15/15
      12,137,803    

 

The fair values of outstanding warrants defined as a derivative instrument are estimated each period using the Black-Scholes pricing model. The assumptions used to calculate the fair value are as follows:

 

    September 28, 2012     December 30, 2011  
Expected terms (years)     1.51       2.25  
Expected volatility     83.20 %     106.20 %
Dividend yield     -       -  
Risk-free rate     0.23 %     0.25 %

 

The change in fair value amounted to approximately $376,000 and $404,000 for the thirteen weeks ended September 28, 2012 and September 30, 2011, respectively, and $192,000 and $86,000 for the thrity-nine weeks ended September 28, 2012 and September 30, 2011, respectively. These changes are included in the line item Gain (loss) on derivative liabilities in  our Statement of Operations.