Note 14 - Fair Value Measurements - Change in Fair Value of the Fuel Hedges and Interest Rate Swaps (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021		Dec. 31, 2020
Balance	$ (4,190)		$ (3,800)
Change in estimated fair value	3,323		(390)
Balance	$ (867)	[1]	$ (4,190)

[1] Recorded in accounts payable and accrued liabilities and other liabilities in the Balance Sheet to these Consolidated Financial Statements.