Note 3 - Income Taxes - Significant Components of Deferred Income Tax Assets and Liabilities (Details) - USD ($) |
Sep. 30, 2020 |
Sep. 30, 2019 |
Sep. 30, 2018 |
|---|---|---|---|
| Gross deferred tax asset (liability) | $ 178,118 | ||
| Gross deferred tax asset (liability) | $ (54,676) | ||
| Valuation allowance | (47,014) | $ (104,858) | |
| Net deferred tax asset (liability) | 178,118 | ||
| Net deferred tax asset (liability) | (101,690) | ||
| Long-term [Member] | |||
| Intangibles | (86,319) | (75,190) | |
| Property and equipment depreciation | (419,896) | (521,586) | |
| Stock-based compensation | 169,730 | 114,118 | |
| Goodwill | (646,916) | (607,882) | |
| Short Term [Member] | |||
| Net operating loss carry forwards and credits | 351,446 | 377,505 | |
| Inventories | 386,296 | 350,197 | |
| Prepaid expenses | (43,233) | (63,252) | |
| Accrued expenses and reserves | $ 467,010 | $ 371,414 |
| X | ||||||||||
- Definition Amount of deferred tax liability attributable to taxable temporary differences. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from intangible assets including goodwill. No definition available.
|
| X | ||||||||||
- 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
|
| X | ||||||||||
- 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
|
| X | ||||||||||
- Definition Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, without jurisdictional netting. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- 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
|
| X | ||||||||||
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from property, plant, and equipment. No definition available.
|
| X | ||||||||||
- 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
|
| X | ||||||||||
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from reserves and accruals. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- 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
|
| X | ||||||||||
- Definition Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences without jurisdictional netting. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount of deferred tax liability attributable to taxable temporary differences from goodwill. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount of deferred tax consequences attributable to taxable temporary differences derived from prepaid expenses. No definition available.
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|