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Statements of Stockholders' Equity (USD $)
Total
Common Stock
Additional Paid-In Capital
Accumulated Deficit
Accumulated Other Comprehensive Income
Beginning Balance at Sep. 30, 2010 $ 1,001,459 $ 17,816 $ 16,477,981 $ (15,494,338)   
Beginning Balance, shares at Sep. 30, 2010   17,816,249      
Conversion of debentures 1,063,926 1,419 1,062,507      
Conversion of debentures, shares   1,418,573      
Issuance of common stock 14,595,366 3,357 14,592,009      
Issuance of common stock, shares   3,357,143      
Exercise of stock options 220,297 651 219,646      
Exercise of stock options, shares (942,639) 651,951      
Exercise of warrants 37,917 42 37,875      
Exercise of warrants, shares   41,666      
Cashless exercise of warrants    616 (616)      
Cashless exercise of warrants, shares   615,448      
Cashless exercise of stock options    243 (243)      
Cashless exercise of stock options, shares   243,336      
Stock-based compensation expense 1,271,238    1,271,238      
Components of other comprehensive income:          
Net loss (125,057)     (125,057)  
Change in unrealized loss on investments (9,855)       (9,855)
Total other comprehensive loss (134,912)        
Ending Balance at Sep. 30, 2011 18,055,291 24,144 33,660,397 (15,619,395) (9,855)
Ending Balance, shares at Sep. 30, 2011 24,144,366 24,144,366      
Exercise of stock options 732,287 1,441 730,846      
Exercise of stock options, shares (1,812,215) 1,440,737      
Cashless exercise of warrants    111 (111)      
Cashless exercise of warrants, shares   110,926      
Cashless exercise of stock options    299 (299)      
Cashless exercise of stock options, shares   299,187      
Stock-based compensation expense 2,599,858    2,599,858      
Components of other comprehensive income:          
Net loss (7,839,996)     (7,839,996)  
Change in unrealized loss on investments 9,239       9,239
Total other comprehensive loss (7,830,757)        
Ending Balance at Sep. 30, 2012 $ 13,556,679 $ 25,995 $ 36,990,691 $ (23,459,391) $ (616)
Ending Balance, shares at Sep. 30, 2012 25,995,216 25,995,216