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Note 8 - Debt - Summary of Debt Outstanding (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Long-term debt, gross |  | $ 635,597 | $ 647,887
Debt discount and issuance costs |  | (10,357) | (10,791)
Less: Current portion of long-term debt |  | (93,366) | (65,386)
Total long-term debt |  | 531,874 | 571,710
Secured Debt [Member] |  |  |
Long-term debt, gross | [1] | 187,500 | 212,500
Unsecured Debt [Member] |  |  |
Long-term debt, gross | [2] | 250,000 | 250,000
Nordic Bond [Member] |  |  |
Long-term debt, gross | [2] | 175,000 | 175,000
Vessel Facility Agreements [Member] |  |  |
Long-term debt, gross |  | $ 23,097 | $ 10,387
[1] | As of June 30, 2025 and December 31, 2024, the fair value (Level 3) of the Senior Secured Term Loan was $192.5 million and $218.2 million, respectively. The Level 3 fair value is derived from discounted present value calculations.
[2] | As of June 30, 2025 and December 31, 2024, the fair value (Level 1) of the 10.375% Senior Unsecured Notes due July 2028 was $265.2 million and $266.1 million, respectively. The fair value is obtained from public transaction activity on the Nordic ABM exchange (XOAM).

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