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Note 12 - Acquisition (Details Textual) $ in Thousands	Jan. 09, 2025 USD ($)	Jul. 31, 2024 USD ($) shares	Jun. 30, 2025 USD ($)	Dec. 31, 2024 USD ($)
Goodwill			$ 59,198	$ 59,031
Torcatt Enterprises Limitada [Member]
Number of Vessels Owned	2
Payments to Acquire Businesses, Gross	$ 16,000
Business Combination, Acquisition-Related Cost, Expense	$ 200
Wineland-Thomson Adventures, Inc [Member]
Payments to Acquire Businesses, Gross		$ 24,000
Business Combination, Acquisition-Related Cost, Expense		2,700
Business Combination, Consideration Transferred		30,000
Business Combination, Consideration Transferred, Equity Interest		$ 6,000
Business Combination, Consideration Transferred, Equity Interest, Share Issued, Number of Shares (in shares) \| shares		682,593
Goodwill				17,000
Wineland-Thomson Adventures, Inc [Member] \| Tradenames and Customer Relationships [Member]
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Excluding Goodwill				$ 8,600