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Income Taxes (Details 2) (USD $) | Sep. 30, 2012 | Sep. 30, 2011
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Summary of Deferred Tax Asset |  |
Net operating loss carryforwards | $ 20,350,000 | $ 20,928,000
Research and development credit | 2,206,000 | 2,094,000
Share-based compensation | 600,000 | 1,761,000
Equipment |  | 90,000
Patents | 229,000 | 252,000
Accruals and other | 509,000 | 490,000
State tax deduction | (2,000) | 4,000
Federal AMT Credit | 49,000 | 155,000
Allowances | 184,000 | 213,000
Gross deferred tax asset | 24,125,000 | 25,987,000
Less valuation allowance | (24,125,000) | (25,987,000)
Deferred tax assets, Net |  |

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