Note 1 - Nature of Operations and Summary of Significant Accounting Policies - Property Plant and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Vessels and related equipment	$ 1,727,197	$ 1,716,339
Other properties and equipment	28,969	32,447
Property, Plant and Equipment, Gross	1,756,166	1,748,786
Less accumulated depreciation and amortization	571,884	433,664
Net properties and equipment	$ 1,184,282	$ 1,315,122

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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