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Note A - Summary of Significant Accounting Policies - Finite Lived Intangible Assets (Details) - USD ($) | 12 Months Ended
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Sep. 30, 2019 | Sep. 30, 2018
Gross carrying amount | $ 5,934,500 | $ 5,797,093
Accumulated amortization | 787,365 | 314,538
Net book value amount | $ 5,147,135 | $ 5,482,555
Customer Relationships [Member] |  |
Useful life (Year) | 15 years | 15 years
Gross carrying amount | $ 3,742,000 | $ 3,742,000
Accumulated amortization | 405,384 | 155,917
Net book value amount | $ 3,336,616 | $ 3,586,083
Certification Marks [Member] |  |
Useful life (Year) | 8 years | 8 years
Gross carrying amount | $ 1,068,000 | $ 1,068,000
Accumulated amortization | 216,937 | 83,437
Net book value amount | $ 851,063 | $ 984,563
Trademarks [Member] |  |
Useful life (Year) | 8 years | 8 years
Gross carrying amount | $ 563,000 | $ 563,000
Accumulated amortization | 114,359 | 43,984
Net book value amount | $ 448,641 | $ 519,016
Patents [Member] |  |
Useful life (Year) | 20 years | 20 years
Gross carrying amount | $ 530,409 | $ 393,002
Accumulated amortization | 38,247 | 24,981
Net book value amount | $ 492,162 | $ 368,021
Other Intangible Assets [Member] |  |
Useful life (Year) | 5 years | 5 years
Gross carrying amount | $ 31,091 | $ 31,091
Accumulated amortization | 12,438 | 6,219
Net book value amount | $ 18,653 | $ 24,872

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- 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. + References No definition available. + Details
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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 928 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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