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Statements of Stockholders' Equity (USD $)
Total
Preferred Stock
Common Stock
Additional Paid-in Capital
Accumulated Deficit
Beginning balance at Dec. 31, 2010 $ 10,443,162    $ 212,042 $ 92,674,786 $ (82,443,666)
Beginning balance, Shares at Dec. 31, 2010      21,204,162    
Exercise of stock options 4,080    40 4,040  
Exercise of stock options, Shares 4,000    4,000    
Stock-based compensation 392,153     392,153  
Net loss for the year ended (3,363,537)       (3,363,537)
Ending balance at Dec. 31, 2011 7,475,858    212,082 93,070,979 (85,807,203)
Ending balance, Shares at Dec. 31, 2011      21,208,162    
Exercise of stock options, Shares 0        
Shareholder rights offering, net of costs 2,220,432   72,500 2,147,932  
Shareholder rights offering, net of costs, Shares     7,250,000    
Stock-based compensation 293,154     293,154  
Net loss for the year ended (2,392,574)       (2,392,574)
Ending balance at Dec. 31, 2012 $ 7,596,870    $ 284,582 $ 95,512,065 $ (88,199,777)
Ending balance, Shares at Dec. 31, 2012      28,458,162