Note 3 - Earnings Per Share - Schedule of Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net (loss) income attributable to Lindblad Expeditions Holdings, Inc.	$ (119,206)	$ (98,737)	$ 16,353
Series A redeemable convertible preferred stock dividend	5,289	1,705	0
Non-cash deemed dividend	170	0	2,654
Undistributed (loss) income available to stockholders	$ (124,665)	$ (100,442)	$ 13,699
Total weighted average shares outstanding, basic (in shares)	50,109,426	49,737,129	47,440,788
Diluted (in shares)	50,109,426	49,737,129	49,426,563
Basic (in dollars per share)	$ (2.41)	$ (2.01)	$ 0.29
Diluted (in dollars per share)	$ (2.41)	$ (2.01)	$ 0.28