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Note 8 - Debt - Summary of Debt Outstanding (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Long-term debt, gross |  | $ 671,897 | $ 647,887
Long-term debt, gross |  | 671,897 | 647,887
Debt discount and issuance costs |  | (16,255) | (10,791)
Less: Current portion of long-term debt |  | (5,840) | (65,386)
Total long-term debt |  | 649,802 | 571,710
Nordic Bond 1 [Member] |  |  |
Long-term debt, gross | [1] | 650,000 | 0
Long-term debt, gross | [1] | 650,000 | 0
Vessel Facility Agreements [Member] |  |  |
Long-term debt, gross |  | 21,897 | 10,387
Long-term debt, gross |  | 21,897 | 10,387
Secured Debt [Member] |  |  |
Long-term debt, gross | [2] | 0 | 212,500
Long-term debt, gross | [2] | 0 | 212,500
Unsecured Debt [Member] |  |  |
Long-term debt, gross | [3] | 0 | 250,000
Long-term debt, gross | [3] | 0 | 250,000
Nordic Bond [Member] |  |  |
Long-term debt, gross | [4] | 0 | 175,000
Long-term debt, gross | [4] | $ 0 | $ 175,000
[1] | As of September 30, 2025, the fair value (Level 1) of the 9.125% Senior Secured Notes due July 2030 was $697.1 million. The fair value is obtained from public transaction activity.
[2] | As of December 31, 2024, the fair value (Level 3) of the Senior Secured Term Loan was $218.2 million. The Level 3 fair value is derived from discounted present value calculations.
[3] | As of December 31, 2024, the fair value (Level 1) of the 10.375% Senior Unsecured Notes due July 2028 was $266.1 million. The fair value is obtained from public transaction activity on the Nordic ABM exchange (XOAM).
[4] | As of December 31, 2024, the fair value (Level 1) of the 8.50% Senior Secured Notes due November 2026 was $180.8 million. The fair value is obtained from public transaction activity on the XOAM.

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-4 + Details
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