Note 4 - Income Taxes - Net Deferred Tax Assets (Details) - USD ($) |
Sep. 30, 2021 |
Sep. 30, 2020 |
|---|---|---|
| Net operating loss carryforwards | $ 10,022,020 | $ 8,451,214 |
| Capitalized expenditures | 1,703,849 | 1,782,185 |
| Research and experimentation credit carryforwards | 946,158 | 928,734 |
| Stock based compensation | 2,352,432 | 2,321,519 |
| Property and Equipment | 2,740 | 3,152 |
| Accrued expenses | 57,812 | 18,518 |
| Inventory allowance | 62,946 | 16,497 |
| Gross deferred tax assets | 15,147,957 | 13,521,819 |
| Deferred tax asset valuation allowance | (15,147,957) | (13,521,819) |
| Net deferred tax assets | $ 0 | $ 0 |
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- Definition Deferred tax assets capitalized expenditures. No definition available.
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from inventory. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible tax credit carryforwards, classified as other. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible research tax credit carryforwards. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from accrued liabilities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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