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Note 11 - Acquisition of Nestor Cables (Details Textual) € in Millions |  | 12 Months Ended |
--- | --- | --- | ---
Jul. 26, 2022 USD ($) | Jul. 26, 2022 EUR (€) | Sep. 30, 2022 USD ($) | Sep. 30, 2023 USD ($)
Goodwill, Ending Balance |  |  | $ 6,402,000 | $ 6,528,000
Nestor Cables [Member] |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired | 100.00% |  |  |
Business Combination, Consideration Transferred, Total | $ 8,000,000 | € 7.9 |  |
Business Combination, Consideration Transferred, Liabilities Incurred | 7,800,000 | € 7.6 |  |
Goodwill, Ending Balance | $ 1,762,000 |  |  |
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Year) | 12 years 9 months 25 days | 12 years 9 months 25 days |  |
Nestor Cables [Member] | Selling, General and Administrative Expenses [Member] |  |  |  |
Business Combination, Acquisition Related Costs |  |  | $ 1,600,000 |
Nestor Cables [Member] | Approximate [Member] |  |  |  |
Goodwill, Ending Balance | $ 1,700,000 |  |  |
Nestor Cables [Member] | Revolving Credit Facility [Member] |  |  |  |
Proceeds from Lines of Credit | $ 16,700,000 |  |  |

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482665/350-30-50-1 + Details
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- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479328/805-10-50-2 + Details
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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479405/805-10-25-23 + Details
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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 30 -Paragraph 8 -SubTopic 30 -Topic 805 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479637/805-30-30-8 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -SubTopic 30 -Topic 805 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479581/805-30-50-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 30 -Paragraph 7 -SubTopic 30 -Topic 805 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479637/805-30-30-7 + Details
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