Note A - Summary of Significant Accounting Policies (Details Textual) |
12 Months Ended | ||
|---|---|---|---|
|
Sep. 30, 2018
USD ($)
shares
|
Sep. 30, 2017
USD ($)
shares
|
Sep. 30, 2016
USD ($)
shares
|
|
| Depreciation, Total | $ 1,748,945 | $ 1,614,272 | $ 1,445,910 |
| Number of Reportable Segments | 1 | ||
| Goodwill, Impairment Loss | $ 0 | 0 | $ 0 |
| Number of Patents Granted | 15 | ||
| Amortization of Intangible Assets, Total | $ 298,801 | 7,822 | 3,292 |
| Impairment of Long-Lived Assets Held-for-use | 0 | 643,604 | 0 |
| Unrecognized Tax Benefits, Ending Balance | 0 | 0 | |
| Research and Development Expense, Total | 787,364 | 865,568 | 838,122 |
| Advertising Expense | $ 365,859 | $ 378,217 | $ 350,399 |
| Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | shares | 108,000 | 0 | 0 |
| Patents [Member] | |||
| Finite-Lived Intangible Asset, Useful Life | 20 years | 20 years | |
| Maximum [Member] | Patents [Member] | |||
| Finite-Lived Intangible Asset, Useful Life | 20 years | ||
| X | ||||||||||
- Definition Represents the number of patents granted in the United States. No definition available.
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| X | ||||||||||
- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. No definition available.
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| X | ||||||||||
- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. No definition available.
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| X | ||||||||||
- Definition The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of unrecognized tax benefits. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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