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Note 3 - Revenues (Details Textual) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Contract with Customer, Liability, Current $ 354,856   $ 318,666
Lindblad Segment [Member]      
Revenues 131,108 $ 118,303  
Lindblad Segment [Member] | Sales Channel, Affinity [Member]      
Revenues   6,400  
Land-experience [Member]      
Revenues $ 48,613 35,311  
Land-experience [Member] | Sales Channel, Affinity [Member]      
Revenues   $ 400