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8. INCOME TAXES Net deferred tax asset (Details) - USD ($) | Sep. 30, 2017 | Sep. 30, 2016
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Income Taxes Net Deferred Tax Asset Details |  |
Net operating loss carryforwards | $ 70,752,000 | $ 64,366,000
R&D credit | 1,221,000 | 1,221,000
Stock-based compensation | 6,292,000 | 6,379,000
Capitalized R&D | 21,160,000 | 18,508,000
Vacation and other | 121,000 | 179,000
Total deferred tax assets | 99,546,000 | 90,653,000
Fixed assets and intangibles | (523,000) | (49,000)
Total deferred tax liability | (523,000) | (49,000)
Net deferred tax asset | 99,023,000 | 90,604,000
Valuation allowance | (99,023,000) | (90,604,000)
DeferredTaxAssetsLiabilitiesNet | $ 0 | $ 0

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