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6. INCOME TAXES Net deferred tax asset (Details) (USD $)
Sep. 30, 2013
Sep. 30, 2012
Income Tax Disclosure [Abstract]    
Net operating loss carryforwards $ 50,485,248 $ 56,664,358
R&D credit 1,221,487 2,258,838
Stock-based compensation 3,323,353 2,455,231
Capitalized R&D 5,542,816 0
Vacation and other 270,121 193,163
Deferred rent 2,356,381 1,278,863
Total deferred tax assets 63,199,406 62,850,453
Derivative gain (8,744,218) (4,681,855)
Depreciation 0 (51,980)
Fixed assets and intangibles (1,968) 0
Total deferred tax liabilities (8,746,186) (4,733,835)
Valuation allowance (54,453,220) (58,116,618)
Net deferred tax asset $ 0 $ 0