Note 13 - Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2021

Notes Tables

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

	Level 1		Level 2		Level 3		Total
December 31, 2020
Liabilities:
Fuel hedge	$	—	$	—	$	297	$	297
Interest rate swaps		—		—		3,893		3,893
	$	—	$	—	$	4,190	$	4,190
March 31, 2021
Liabilities:
Fuel hedge		—		—		58		58
Interest rate swaps		—		—		3,045		3,045
	$	—	$	—	$	3,103	$	3,103

Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

Ending balance, December 31, 2020*	$	(4,190	)
Change in estimated fair value		1,087
Ending balance, March 31, 2021*	$	(3,103	)