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Note 11 - Goodwill and Intangibles - Finite Lived Intangible Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Sep. 30, 2024
--- | --- | ---
Accumulated amortization | $ 12,430 | $ 12,173
Net carrying amount | 6,327 | 5,830
Gross carrying amount | $ 6,103 | $ 6,343
Customer Relationships [Member] |  |
Gross carrying amount (Year) | 15 years | 15 years
Accumulated amortization | $ 4,778 | $ 4,856
Net carrying amount | 1,884 | 1,815
Gross carrying amount | $ 2,894 | $ 3,041
Finite-Lived Intangible Asset, Useful Life | 15 years | 15 years
Certification Marks [Member] |  |
Gross carrying amount (Year) | 8 years | 8 years
Accumulated amortization | $ 1,068 | $ 1,068
Net carrying amount | 918 | 884
Gross carrying amount | $ 150 | $ 184
Finite-Lived Intangible Asset, Useful Life | 8 years | 8 years
Trademarks [Member] |  |
Accumulated amortization | $ 1,081 | $ 1,120
Net carrying amount | 610 | 588
Gross carrying amount | $ 471 | $ 532
Trademarks [Member] | Minimum [Member] |  |
Gross carrying amount (Year) | 8 years | 8 years
Finite-Lived Intangible Asset, Useful Life | 8 years | 8 years
Trademarks [Member] | Maximum [Member] |  |
Gross carrying amount (Year) | 10 years | 10 years
Finite-Lived Intangible Asset, Useful Life | 10 years | 10 years
Patents [Member] |  |
Gross carrying amount (Year) | 20 years | 20 years
Accumulated amortization | $ 1,330 | $ 1,302
Net carrying amount | 232 | 219
Gross carrying amount | $ 1,098 | $ 1,083
Finite-Lived Intangible Asset, Useful Life | 20 years | 20 years
Developed Technology Rights [Member] |  |
Gross carrying amount (Year) | 10 years | 10 years
Accumulated amortization | $ 321 | $ 346
Net carrying amount | 77 | 75
Gross carrying amount | $ 244 | $ 271
Finite-Lived Intangible Asset, Useful Life | 10 years | 10 years
Other Intangible Assets [Member] |  |
Gross carrying amount (Year) | 5 years | 5 years
Accumulated amortization | $ 6 | $ 6
Net carrying amount | 6 | 6
Gross carrying amount | $ 0 | $ 0
Finite-Lived Intangible Asset, Useful Life | 5 years | 5 years
Computer Software, Intangible Asset [Member] |  |
Accumulated amortization | $ 3,846 | $ 3,475
Net carrying amount | 2,600 | 2,243
Gross carrying amount | $ 1,246 | $ 1,232
Computer Software, Intangible Asset [Member] | Minimum [Member] |  |
Gross carrying amount (Year) | 1 year | 1 year
Finite-Lived Intangible Asset, Useful Life | 1 year | 1 year
Computer Software, Intangible Asset [Member] | Maximum [Member] |  |
Gross carrying amount (Year) | 3 years | 3 years
Finite-Lived Intangible Asset, Useful Life | 3 years | 3 years

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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/exampleRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 40 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482640/350-30-55-40 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 10 -Name Accounting Standards Codification -Section S45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480265/350-10-S45-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(16)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + 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/exampleRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 40 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482640/350-30-55-40 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 10 -Name Accounting Standards Codification -Section S45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480265/350-10-S45-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 928 -SubTopic 340 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478859/928-340-50-1 + Details
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