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Stock Transactions Assumptions were used in the fair value calculations (Details)
Feb. 05, 2008
Jan. 10, 2008
Oct. 22, 2007
May 01, 2007
Apr. 23, 2007
Assumptions were used in the fair value calculations          
Risk free rate   3.91% 4.42% 4.64% 4.66%
Risk free minimum rate 1.93%        
Risk free maximum rate 3.61%        
Expected volatility of stock 133.83% 133.83% 134.33% 131.13% 133.59%
Expected dividend yield 0.00% 0.00% 0.00% 0.00% 0.00%