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8. INCOME TAXES Net deferred tax asset (Details) - USD ($) | Sep. 30, 2018 | Sep. 30, 2017
--- | --- | ---
Income Taxes Net Deferred Tax Asset |  |
Net operating loss carryforwards | $ 5,052,000 | $ 70,752,000
R&D credit | 1,221,000 | 1,221,000
Stock-based compensation | 3,097,000 | 6,292,000
Capitalized R&D | 15,518,000 | 21,160,000
Vacation and other | 544,000 | 121,000
Total deferred tax assets | 25,432,000 | 99,546,000
Fixed assets and intangibles | (634,000) | (523,000)
Total deferred tax liability | (634,000) | (523,000)
Net deferred tax asset | 24,798,000 | 99,023,000
Valuation allowance | (24,798,000) | (99,023,000)
DeferredTaxAssetsLiabilitiesNet | $ 0 | $ 0

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