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Consolidated Statements of Shareholders' Equity (USD $)
Series A Convertible Preferred Stock
Common Stock
Accumulated Deficit
Total
Balance at Jun. 30, 2009 $ 3,614,554 $ 194,948,693 $ (178,590,975) $ 19,972,272
Balance (in shares) at Jun. 30, 2009 510,270 15,423,022    
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Issuance of common stock at $2.00 per share, less issuance costs of $1,613,425   12,958,159   12,958,159
Issuance of common stock at $2.00 per share, less issuance costs of $1,613,425 (in shares)   7,285,792    
Issuance of common stock at $0.90 per share less issuance cost   1,974,014   1,974,014
Issuance of common stock at $0.90 per share less issuance cost (in shares)   2,753,454    
Issuance of fully-vested shares of common stock to officers and employees and vesting of shares granted under the 2008 Stock Incentive Plan   87,354   87,354
Issuance of fully-vested shares of common stock to officers and employees and vesting of shares granted under the 2008 Stock Incentive Plan (in shares)   40,000    
Retirement of common stock   (9,668)   (9,668)
Retirement of common stock (in shares)   (5,113)    
Retirement of preferred stock (465,878)   (132,586) (598,464)
Retirement of preferred stock (in shares) (65,802)      
Net loss     (11,571,495) (11,571,495)
Balance at Jun. 30, 2010 3,148,676 209,958,552 (190,295,056) 22,812,172
Balance (in shares) at Jun. 30, 2010 444,468 25,497,155    
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Issuance of common stock at $0.90 per share less issuance cost   5,671   5,671
Issuance of common stock at $0.90 per share less issuance cost (in shares)   261,953    
Issuance of common stock to Lincoln Park Capital         
Issuance of common stock to Lincoln Park Capital (in shares)   150,000    
Issuance of common stock at $2.064 per share less the fair value of warrants issued of $1,917,122 and less cash issuance costs of $838,705   7,976,973   7,976,973
Issuance of common stock at $2.064 per share less the fair value of warrants issued of $1,917,122 and less cash issuance costs of $838,705 (in shares)   5,200,000    
Exercise of warrants at $2.20 resulting in the issuance of common stock   827,981   827,981
Exercise of warrants at $2.20 resulting in the issuance of common stock (in shares)   376,355    
Exercise of warrants at $1.13 resulting in the issuance of common stock   562,025   562,025
Exercise of warrants at $1.13 resulting in the issuance of common stock (in shares)   497,367    
Cashless exercise of warrants resulting in the issuance of common stock         
Cashless exercise of warrants resulting in the issuance of common stock (in shares)   83,472    
Conversion of preferred stock into common stock (10,620) 10,620    
Conversion of preferred stock into common stock (in shares) (1,500) 15    
Conversion of preferred dividends into common stock   33,000 (33,000)  
Conversion of preferred dividends into common stock (in shares)   33    
Issuance of fully-vested shares of common stock to officers and employees and vesting of shares granted under the 2008 Stock Incentive Plan   10,208   10,208
Issuance of fully-vested shares of common stock to officers and employees and vesting of shares granted under the 2008 Stock Incentive Plan (in shares)   20,747    
Issuance of fully-vested shares of common stock to employees and directors and vesting of shares granted under the 2010 Stock Incentive Plan   292,263   292,263
Issuance of fully-vested shares of common stock to employees and directors and vesting of shares granted under the 2010 Stock Incentive Plan (in shares)   109,918    
Issuance of common stock for settlement of the Long-Term Equity Incentive Program for Fiscal Year 2010   97,566   97,566
Issuance of common stock for settlement of the Long-Term Equity Incentive Program for Fiscal Year 2010 (in shares)   86,342    
Retirement of common stock   (2,261)   (2,261)
Retirement of common stock (in shares)   (2,217)    
Net loss     (6,457,067) (6,457,067)
Balance at Jun. 30, 2011 3,138,056 219,772,598 (196,785,123) 26,125,531
Balance (in shares) at Jun. 30, 2011 442,968 32,281,140    
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Exercise of warrants at $2.20 resulting in the issuance of common stock   10,010   10,010
Exercise of warrants at $2.20 resulting in the issuance of common stock (in shares)   4,550    
Cashless exercise of warrants resulting in the issuance of common stock         
Cashless exercise of warrants resulting in the issuance of common stock (in shares)   990    
Issuance of fully-vested shares of common stock to employees and directors and vesting of shares granted under the 2010 Stock Incentive Plan   248,851   248,851
Issuance of fully-vested shares of common stock to employees and directors and vesting of shares granted under the 2010 Stock Incentive Plan (in shares)   120,472    
Issuance of fully-vested shares of common stock to employees and directors and vesting of shares under the 2011 Stock Incentive Plan   335,636   335,636
Issuance of fully-vested shares of common stock to employees and directors and vesting of shares under the 2011 Stock Incentive Plan (in shares)   141,666    
Vesting of shares under the 2012 stock incentive plan   197,613   197,613
Retirement of common stock   (51,381)   (51,381)
Retirement of common stock (in shares)   (38,749)    
Net loss     (5,211,238) (5,211,238)
Balance at Jun. 30, 2012 $ 3,138,056 $ 220,513,327 $ (201,996,361) $ 21,655,022
Balance (in shares) at Jun. 30, 2012 442,968 32,510,069