Note 13 - Segment Information - Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Tour revenues	$ 1,780	$ 81,238
Tour revenues, change	$ (79,458)
Tour revenues, percentage change	(98.00%)
Operating income	$ (31,066)	2,251
Operating income, change	(33,317)
Depreciation and amortization	8,249	6,690
Total depreciation and amortization, change	$ 1,559
Total depreciation and amortization, percentage change	23.00%
Total Assets	$ 759,900		$ 757,449
Total intangibles, net	10,963		4,817
Total goodwill	33,652		22,105
Lindblad Segment [Member]
Tour revenues	484	69,539
Tour revenues, change	$ (69,055)
Tour revenues, percentage change	(99.00%)
Operating income	$ (27,296)	2,189
Operating income, change	(29,485)
Depreciation and amortization	7,867	6,248
Total depreciation and amortization, change	$ 1,619
Total depreciation and amortization, percentage change	26.00%
Total Assets	$ 677,920		698,420
Total intangibles, net	2,418		2,599
Total goodwill	0		0
Land-experience [Member]
Tour revenues	1,296	11,699
Tour revenues, change	$ (10,403)
Tour revenues, percentage change	(89.00%)
Operating income	$ (3,770)	62
Operating income, change	(3,832)
Depreciation and amortization	382	$ 442
Total depreciation and amortization, change	$ (60)
Total depreciation and amortization, percentage change	(14.00%)
Total Assets	$ 81,980		59,029
Total intangibles, net	8,545		2,218
Total goodwill	$ 33,652		$ 22,105