Consolidated Statements of Shareholders' Equity (USD $)
Total
Common Stock [Member]
Additional Paid-In Capital [Member]
Accumulated Deficit [Member]
Balance at Dec. 31, 2010 $ 7,472,452 $ 1,828 $ 87,744,842 $ (80,274,218)
Balance, shares at Dec. 31, 2010   18,281,973    
Exercise of options and warrants 65,977 6 65,971   
Exercise of options and warrants, shares   60,382    
Share-based compensation 702,837 20 702,817   
Share-based compensation, shares   202,000    
Net loss (4,134,068)       (4,134,068)
Balance at Dec. 31, 2011 4,107,198 1,854 88,513,630 (84,408,286)
Balance, shares at Dec. 31, 2011   18,544,355    
Issuances of common stock 12,250,500 374 12,250,126   
Issuances of common stock, shares 3,739,227 3,739,227    
Share-based compensation 878,578 37 878,541   
Share-based compensation, shares   363,200    
Net loss (3,063,601)       (3,063,601)
Balance at Dec. 31, 2012 14,172,675 2,265 101,642,297 (87,471,887)
Balance, shares at Dec. 31, 2012   22,646,782    
Exercise of options and warrants 822,969 18 822,951   
Exercise of options and warrants, shares   179,983    
Share-based compensation 2,719,380 28 2,719,352   
Share-based compensation, shares   282,900    
Net loss (5,845,087)       (5,845,087)
Balance at Dec. 31, 2013 $ 11,869,937 $ 2,311 $ 105,184,600 $ (93,316,974)
Balance, shares at Dec. 31, 2013   23,109,665