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v3.25.2

Note 16 - Debt (Details Textual) |  |  | 1 Months Ended | 6 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Aug. 05, 2024 | Apr. 01, 2022 USD ($) | Mar. 31, 2021 EUR (€) | Mar. 31, 2025 EUR (€) | Jun. 30, 2025 USD ($) | Jun. 30, 2025 EUR (€) | Sep. 30, 2024 USD ($)
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] |  | us-gaap:SecuredOvernightFinancingRateSofrMember |  |  |  |  |
Bank Overdrafts, Maximum Allowed | € |  |  |  | € 2,000,000 |  |  |
Bank Overdrafts, Basis Spread on Variable Rate |  |  |  | 1.15% |  |  |
Bank Overdrafts |  |  |  |  | $ 862,000 | € 731,000 | $ 0
Loan Agreement, Nestor Cables [Member] | Senior Loans [Member] |  |  |  |  |  |  |
Debt Instrument, Face Amount | € |  |  | € 2,000,000,000,000 |  |  |  |
Debt Instrument, Term (Year) |  |  | 3 years |  |  |  |
NESA [Member] | Senior Loans [Member] |  |  |  |  |  |  |
Debt Instrument, Covenant, Interest Payment Cap |  |  | 5.00% |  |  |  |
Debt Instrument, Covenant, Interest Penalty |  |  | 2.00% |  |  |  |
Senior Loan Agreement [Member] |  |  |  |  |  |  |
Long-Term Debt |  |  |  |  | $ 2,358,000 | € 2,000,000 | $ 2,228,000
Revolving Credit Facility [Member] | Loan and Security Agreement With Bremer Bank, National Association [Member] |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | $ |  | $ 40,000,000 |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  | 1.85% |  |  |  |  |
Debt Instrument, Minimum Interest Rate Required |  | 1.80% |  |  |  |  |
Debt Instrument, Interest Rate During Period |  |  |  |  | 6.18% |  |
Debt Instrument, Covenant, Minimum Debt Service Coverage Ratio | 1.2 |  |  |  |  |  |
Debt Instrument, Covenant, Maximum Debt to Cash Flow Ratio | 2 |  |  |  |  |  |
Debt Instrument, Collateral Amount | $ |  |  |  |  | $ 292,178,000 |  |

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- Definition Percentage points added to the reference rate to compute the variable rate on bank overdrafts. + References No definition available. + Details
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- Definition The maximum amount of bank overdrafts allowed for applicable bank accounts. + References No definition available. + Details
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- Definition Interest payment cap. + References No definition available. + Details
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- Definition Additional interest penalty on debt instrument. + References No definition available. + Details
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- Definition Maximum debt to cash flow ratio required under debt instrument. + References No definition available. + Details
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- Definition Minimum debt service coverage ratio required under debt instrument. + References No definition available. + Details
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- Definition The minimum interest rate required for debt instrument. + References No definition available. + Details
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- Definition Carrying value as of the balance sheet date of payments made in excess of existing cash balances, which will be honored by the bank but reflected as a loan to the entity. Overdrafts generally have a very short time frame for correction or repayment and are therefore more similar to short-term bank financing than trade financing. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(20)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 45 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481573/470-10-45-10 + Details
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- Definition Amount of assets pledged to secure a debt instrument. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477734/942-470-50-3 + Details
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- Definition The average effective interest rate during the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)(a)(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1F -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1F Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482925/835-30-45-2 + Details
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- Definition Period of time between issuance and maturity of debt instrument, 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 Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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