Note 1 - Nature of Operations and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2024

Notes Tables

Property, Plant and Equipment [Table Text Block]

(In Thousands)	December 31,		December 31,
	2024		2023
Properties and equipment:
Vessels and related equipment	$	1,727,197	$	1,716,339
Other properties and equipment		28,969		32,447
		1,756,166		1,748,786
Less accumulated depreciation and amortization		571,884		433,664
Net properties and equipment	$	1,184,282	$	1,315,122

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

(In Thousands, except per share data)	Year Ended December 31,
	2024		2023		2022
Net income (loss) available to common stockholders	$	180,656	$	97,185	$	(21,749	)
Weighted average outstanding shares of common stock, basic		52,452		51,591		44,132
Dilutive effect of options, warrants and stock awards		619		1,346		—
Weighted average common stock and equivalents		53,071		52,937		44,132
Income (loss) per share, basic	$	3.44	$	1.88	$	(0.49	)
Income (loss) per share, diluted	$	3.40	$	1.84	$	(0.49	)
Additional information:
Incremental "in-the-money" options, warrants, and restricted stock units outstanding at the end of the period		856		1,674		1,863

Financing Receivable, Allowance for Credit Loss [Table Text Block]

	Trade
(In Thousands)	and
	Other Receivables
Balance at January 1, 2022	$	74,404
Current period provision for expected credit losses		414
Acquisition of Sonatide joint venture		(59,678	)
Other		(1,080	)
Balance at December 31, 2022	$	14,060
Current period provision for expected credit losses		3,305
Write offs		(1,484	)
Recoveries		490
Other		(457	)
Balance at December 31, 2023	$	15,914
Current period credit for expected credit losses		(1,430	)
Write offs (A)		(10,969	)
Other		(331	)
Balance at December 31, 2024	$	3,184