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Consolidated Statements of Shareholders' Equity (USD $)
Common Stock [Member]
Additional Paid-In Capital [Member]
Retained Earnings [Member]
Total
Balance at Dec. 31, 2009 $ 1,652 $ 80,563,038 $ (76,399,353) $ 4,165,337
Balance (in shares) at Dec. 31, 2009 16,522,727      
Issuances of common stock 172 6,409,204 0 6,409,376
Issuances of common stock (in shares) 1,718,746      
Share-based compensation 4 772,600 0 772,604
Share-based compensation (in shares) 40,500      
Net Loss 0 0 (3,874,865) (3,874,865)
Balance at Dec. 31, 2010 1,828 87,744,842 (80,274,218) 7,472,452
Balance (in shares) at Dec. 31, 2010 18,281,973      
Exercise of options and warrants 6 65,971 0 65,977
Exercise of options and warrants (in shares) 60,382      
Share-based compensation 20 702,817 0 702,837
Share-based compensation (in shares) 202,000      
Net Loss 0 0 (4,134,068) (4,134,068)
Balance at Dec. 31, 2011 1,854 88,513,630 (84,408,286) 4,107,198
Balance (in shares) at Dec. 31, 2011 18,544,355      
Issuances of common stock 374 12,250,126 0 12,250,500
Issuances of common stock (in shares) 3,739,227      
Share-based compensation 37 878,541 0 878,578
Share-based compensation (in shares) 363,200      
Net Loss 0 0 (3,063,601) (3,063,601)
Balance at Dec. 31, 2012 $ 2,265 $ 101,642,297 $ (87,471,887) $ 14,172,675
Balance (in shares) at Dec. 31, 2012 22,646,782