Note 11 - Segment Information - Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Tour revenues	$ 240,172	$ 206,005	$ 587,838	$ 496,118
Operating (loss) income	35,970	29,481	50,993	29,124
Cost of tours	124,373	109,786	308,611	277,191
General and administrative	34,808	29,002	98,613	86,074
Selling and marketing	30,091	25,003	84,722	66,042
Depreciation and amortization	14,930	12,733	44,899	37,687
Total Assets	976,534		976,534		$ 876,905
Total intangibles, net	17,365		17,365		15,923
Total goodwill	61,145		61,145		59,031
Operating Segments [Member]
Tour revenues	240,172	206,005	587,838	496,118
Operating (loss) income	35,970	29,481	50,993	29,124
Lindblad Segment [Member]
Depreciation	13,338	11,739	40,606	34,926
Amortization	22	22	66	66
Total Assets	701,288		701,288		667,799
Total intangibles, net	4,739		4,739		1,505
Total goodwill	0		0		0
Lindblad Segment [Member] | Operating Segments [Member]
Tour revenues	137,561	121,268	379,714	332,624
Operating (loss) income	13,236	11,680	19,553	10,092
Cost of tours	63,800	59,202	187,092	177,306
General and administrative	23,682	19,089	65,758	57,628
Selling and marketing	23,483	19,536	66,639	52,606
Depreciation and amortization	13,360	11,761	40,672	34,992
Land-experience [Member]
Depreciation	972	542	2,432	1,405
Amortization	598	430	1,795	1,290
Total Assets	275,246		275,246		209,106
Total intangibles, net	12,626		12,626		14,418
Total goodwill	61,145		61,145		$ 59,031
Land-experience [Member] | Operating Segments [Member]
Tour revenues	102,611	84,737	208,124	163,494
Operating (loss) income	22,734	17,801	31,440	19,032
Cost of tours	60,573	50,584	121,519	99,885
General and administrative	11,126	9,913	32,855	28,446
Selling and marketing	6,608	5,467	18,083	13,436
Depreciation and amortization	$ 1,570	$ 972	$ 4,227	$ 2,695