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

12 Months Ended

Dec. 31, 2023

Notes Tables

Property, Plant and Equipment [Table Text Block]

(In Thousands)		December 31,				December 31,
		2023				2022
Properties and equipment:
Vessels and related equipment		$	1,716,339			$	1,070,821
Other properties and equipment			32,447				35,819
			1,748,786				1,106,640
Less accumulated depreciation and amortization			433,664				309,985
Net properties and equipment		$	1,315,122			$	796,655

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

(In Thousands, except per share data)		Year Ended December 31,
		2023				2022				2021
Net income (loss) available to common stockholders		$	97,185			$	(21,749	)		$	(128,969	)
Weighted average outstanding shares of common stock, basic			51,591				44,132				41,009
Dilutive effect of options, warrants and stock awards			1,346				—				—
Weighted average common stock and equivalents			52,937				44,132				41,009
Income (loss) per share, basic		$	1.88			$	(0.49	)		$	(3.14	)
Income (loss) per share, diluted		$	1.84			$	(0.49	)		$	(3.14	)
Additional information:
Incremental "in-the-money" options, warrants, and restricted stock units outstanding at the end of the period (A)			1,674				1,863				2,346

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

		Trade
(In Thousands)		and
		Other Receivables
Balance at January 1, 2021		$	73,316
Current period provision for expected credit losses			1,238
Write offs			(406	)
Other			256
Balance at December 31, 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

X

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Tabular disclosure of allowance for credit loss on financing receivable.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
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+ References

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