Note 13 - Segment Information - Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Tour revenues	$ 15,266		$ 17,047	$ 80,971
Tour revenues (loss)		$ (268)
Tour revenues, change	15,534		(63,924)
Tour revenues	15,534		(63,924)
Operating income	(32,588)	(34,746)	(63,652)	(32,495)
Operating income, change	$ 2,158		$ (31,157)
Operating income, percentage change	6.00%		(96.00%)
Depreciation and amortization	$ 8,213	8,553	$ 16,462	15,243
Total depreciation and amortization, change	$ (340)		$ 1,219
Total depreciation and amortization, percentage change	(4.00%)		8.00%
Total Assets	$ 799,297		$ 799,297		$ 757,449
Total intangibles, net	10,678		10,678		4,817
Total goodwill	33,652		33,652		22,105
Lindblad Segment [Member]
Tour revenues	6,680		7,164	69,517
Tour revenues (loss)		(22)
Tour revenues, change	6,702		(62,353)
Tour revenues	6,702		(62,353)
Operating income	(31,038)	(31,641)	(58,335)	(29,452)
Operating income, change	$ 603		$ (28,883)
Operating income, percentage change	2.00%		(98.00%)
Depreciation and amortization	$ 7,823	7,939	$ 15,690	14,188
Total depreciation and amortization, change	$ (116)		$ 1,502
Total depreciation and amortization, percentage change	(1.00%)		11.00%
Total Assets	$ 701,301		$ 701,301		698,420
Total intangibles, net	2,237		2,237		2,599
Total goodwill	0		0		0
Land-experience [Member]
Tour revenues	8,586		9,883
Tour revenues (loss)		(246)
Tour revenues, change	8,832		(1,571)	11,454
Tour revenues	8,832		(1,571)	11,454
Operating income	(1,550)	(3,105)	(5,317)	(3,043)
Operating income, change	$ 1,555		$ (2,274)
Operating income, percentage change	50.00%		(75.00%)
Depreciation and amortization	$ 390	$ 614	$ 772	$ 1,055
Total depreciation and amortization, change	$ (224)		$ (283)
Total depreciation and amortization, percentage change	(36.00%)		(27.00%)
Total Assets	$ 97,996		$ 97,996		59,029
Total intangibles, net	8,441		8,441		2,218
Total goodwill	$ 33,652		$ 33,652		$ 22,105