Note 13 - Segment Information - Segment Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Tour revenues	$ 569,543	$ 421,500	$ 147,107
Operating income (loss)	10,599	(63,046)	(110,831)
Depreciation and amortization	46,711	44,042	39,525
Total Assets	831,297	787,975
Total intangibles, net	9,412	11,219
Total goodwill	42,017	42,017
Lindblad Segment [Member]
Tour revenues	397,410	278,449	82,842
Operating income (loss)	(8,692)	(77,871)	(111,477)
Depreciation and amortization	43,351	41,275	37,516
Total Assets	675,432	662,683
Total intangibles, net	1,592	1,680
Total goodwill	0	0
Land-experience [Member]
Tour revenues	172,133	143,051	64,265
Operating income (loss)	19,291	14,825	646
Depreciation and amortization	3,360	2,767	2,009
Total Assets	155,865	125,292
Total intangibles, net	7,820	9,539
Total goodwill	$ 42,017	$ 42,017	$ 42,017	$ 22,105