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STATEMENTS OF OPERATIONS (USD $)
 12 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2011
Income Statement [Abstract]      
GRANT INCOME AND OTHER $ 159,583 $ 254,610 $ 956,154
OPERATING EXPENSES:      
Research and development (excluding R&D depreciation of $253,072, $445,710, and $438,738, respectively, included below) 12,681,049 10,368,695 11,745,629
Depreciation and amortization 364,124 533,468 531,316
General & administrative 6,982,686 6,595,287 6,664,883
Total operating expenses 20,027,859 17,497,450 18,941,828
OPERATING LOSS (19,868,276) (17,242,840) (17,985,674)
OTHER EXPENSES 0 0 (12,000,000)
GAIN ON DERIVATIVE INSTRUMENTS 10,750,666 1,911,683 4,432,148
INTEREST INCOME 117,086 116,061 164,163
INTEREST EXPENSE (170,423) (262,214) (322,980)
NET LOSS (9,170,947) (15,477,310) (25,712,343)
ISSUANCE OF ADDITIONAL SHARES DUE TO RESET PROVISIONS 0 (250,000) 0
MODIFICATION OF WARRANTS (59,531) (325,620) (1,068,369)
INDUCEMENT WARRANTS 0 (1,593,000) 0
NET LOSS AVAILABLE TO COMMON SHAREHOLDERS $ (9,230,478) $ (17,645,930) $ (26,780,712)
NET LOSS PER COMMON SHARE      
BASIC $ (0.30) $ (0.70) $ (1.28)
DILUTED $ (0.66) $ (0.78) $ (1.49)
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING      
BASIC and DILUTED 30,279,442 25,183,654 20,848,899