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Note 8 - Debt (Details Textual) $ in Thousands, € in Millions |  |  | 3 Months Ended | 9 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jul. 07, 2025 USD ($) | Jul. 05, 2023 USD ($) | Sep. 30, 2025 USD ($) | Sep. 30, 2024 USD ($) | Sep. 30, 2025 USD ($) | Sep. 30, 2024 USD ($) | Sep. 30, 2025 EUR (€) | Jun. 30, 2025 USD ($) | Dec. 31, 2024 USD ($) | Jul. 03, 2023 USD ($) | Nov. 16, 2021 USD ($)
Gain (Loss) on Extinguishment of Debt |  |  | $ (27,101) | $ 0 | $ (27,101) | $ 0 |  |  |  |  |
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) [Member] |  |  |  |  |  |  |  |  |  |
Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  |  | $ 25,000 |  |  |
Revolving Credit Facility [Member] | DNB Bank ASA, New York [Member] |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | $ 250,000 |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Minimum Borrowing Commitment | $ 20,000 |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Minimum Borrowing Capacity, Percent of Interest-bearing Debt | 10.00% |  |  |  |  |  |  |  |  |  |
Ratio of Interest-bearing Debt to EBITDA | 3 |  |  |  |  |  |  |  |  |  |
Ratio of Fair Market Value of Collateral to Outstanding Debt | 2.5 |  |  |  |  |  |  |  |  |  |
Revolving Credit Facility [Member] | DNB Bank ASA, New York [Member] | Fed Funds Effective Rate Overnight Index Swap Rate [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 0.50% |  |  |  |  |  |  |  |  |  |
Revolving Credit Facility [Member] | DNB Bank ASA, New York [Member] | Secured Overnight Financing Rate (SOFR) [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 1.00% |  |  |  |  |  |  |  |  |  |
Revolving Credit Facility [Member] | DNB Bank ASA, New York [Member] | Margin Rate [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 1.00% |  |  |  |  |  |  |  |  |  |
Revolving Credit Facility [Member] | DNB Bank ASA, New York [Member] | Minimum [Member] | Applicable Margin Rate [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 2.50% |  |  |  |  |  |  |  |  |  |
Revolving Credit Facility [Member] | DNB Bank ASA, New York [Member] | Maximum [Member] | Applicable Margin Rate [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 3.50% |  |  |  |  |  |  |  |  |  |
The 2023 Notes [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 9.125% |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount | $ 650,000 |  |  |  |  |  |  |  |  |  |
The 2023 Notes [Member] | Debt Instrument, Redemption, Period One [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Redemption Price, Percentage | 100.00% |  |  |  |  |  |  |  |  |  |
The 2023 Notes [Member] | Debt Instrument, Redemption, Period Two [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Redemption Price, Percentage | 104.563% |  |  |  |  |  |  |  |  |  |
Vessel Facility Agreements [Member] | Delivery of Vessels Per Arrangement [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  | $ 26,700 |  | $ 26,700 |  | € 24.9 |  |  |  |
Vessel Facility Agreements [Member] | Minimum [Member] | Delivery of Vessels Per Arrangement [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 2.70% |  | 2.70% |  | 2.70% |  |  |  |
Vessel Facility Agreements [Member] | Maximum [Member] | Delivery of Vessels Per Arrangement [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 6.30% |  | 6.30% |  | 6.30% |  |  |  |
Nordic Bond [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  |  |  |  | 8.50%
Debt Instrument, Covenant, Prepayment Premium Percentage |  |  |  |  |  |  |  |  |  |  | 2.55%
Debt Instrument, Covenant, Prepayment Premium Percentage, Increase (Decrease) |  |  |  |  |  |  |  |  |  |  | 0.85%
Nordic Bond [Member] | GOLP and TMII [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Collateral, Percentage of Equity Interests |  |  |  |  |  |  |  |  |  |  | 66.00%
Nordic Bond 1 [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 9.125% |  | 9.125% |  | 9.125% |  |  |  |
Long-Term Debt, Fair Value |  |  | $ 697,100 |  | $ 697,100 |  |  |  |  |  |
Secured Debt [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  |  |  |  | 8.50%
Long-Term Debt, Fair Value |  |  |  |  |  |  |  |  | $ 218,200 |  |
Redemption Premium | $ 4,500 |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  | $ 325,000 |  |  |  |  |  |  |  |  | $ 175,000
Secured Debt [Member] | Tranche A Term Loan [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  | 5.00% |  |  |  |  |  |  |  |  |
Secured Debt [Member] | Tranche A Term Loan [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  | 8.00% |  |  |  |  |  |  |  |  |
Secured Debt [Member] | Tranche B Term Loan [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  | 3.75% |  |  |  |  |  |  |  |  |
Unsecured Debt [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 10.375% |  | 10.375% |  | 10.375% |  | 10.375% |  | 10.375% | 10.375% |
Long-Term Debt, Fair Value |  |  |  |  |  |  |  |  | $ 266,100 |  |
Redemption Premium | $ 15,000 |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  |  |  |  |  |  | $ 250,000 |
Debt Instrument, Covenant, Prepayment Premium Percentage |  |  |  |  |  |  |  |  |  | 6.00% |
Nordic Bond [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 8.50% |  | 8.50% |  | 8.50% |  | 8.50% |  | 8.50% |  |
Long-Term Debt, Fair Value |  |  |  |  |  |  |  |  | $ 180,800 |  |
Extinguished Debt [Member] |  |  |  |  |  |  |  |  |  |  |
Deferred Debt Issuance Cost, Writeoff |  |  | $ 7,500 |  |  |  |  |  |  |  |
Gain (Loss) on Extinguishment of Debt |  |  | $ (27,100) |  | $ (27,100) |  |  |  |  |  |

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- Definition Minimum 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, as a percent of interest-bearing debt. + References No definition available. + Details
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