Note 7 - Assets Held for Sale, Asset Sales and Asset Impairments - Summary of Vessel Sales and Gains on Sales of Vessels (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Gain on sale of vessels	$ 13,682	$ 15,762	$ 8,701
Total vessels sold/recycled	12	6	7
Vessels Held for Sale [Member]
Gain on sale of vessels	$ 0	$ 0	$ 3,088
Vessels sold/recycled from assets held for sale	0	0	8
Vessels, Active Fleet [Member]
Vessels sold from active fleet	12	6	7
Gain on sale of vessels	$ 13,682	$ 15,677	$ 5,613
Vessel [Member]
Gain on sale of vessels	$ 13,682	$ 15,677	$ 8,701
Total vessels sold/recycled	12	6	15