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

12 Months Ended

Dec. 31, 2021

Notes Tables

Property, Plant and Equipment [Table Text Block]

(In Thousands)		December 31,				December 31,
		2021				2020
Properties and equipment:
Vessels and related equipment		$	898,649			$	940,175
Other properties and equipment			19,625				16,861
			918,274				957,036
Less accumulated depreciation and amortization			230,234				176,718
Net properties and equipment		$	688,040			$	780,318

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

(In Thousands, except share and per share data)		Year Ended December 31,
		2021				2020				2019
Net loss available to common shareholders		$	(128,969	)		$	(196,242	)		$	(141,743	)
Weighted average outstanding shares of common stock, basic			41,008,907				40,354,638				38,204,934
Dilutive effect of options, warrants and stock awards			—				—				—
Weighted average common stock and equivalents			41,008,907				40,354,638				38,204,934
Loss per share, basic		$	(3.14	)		$	(4.86	)		$	(3.71	)
Loss per share, diluted		$	(3.14	)		$	(4.86	)		$	(3.71	)
Additional information:
Incremental "in-the-money" options, warrants, and restricted stock awards and units outstanding at the end of the period (A)			2,345,948				2,235,310				2,483,956

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

		Trade				Due
(In Thousands)		and				from
		Other Receivables				Affiliate
Balance at January 1, 2020		$	70			$	20,083
Cumulative effect adjustment upon adoption of standard			163				—
Current period provision for expected credit losses			1,283				52,981
Other			—				(1,264	)
Balance at December 31, 2020		$	1,516			$	71,800
Current period provision for expected credit losses			838				400
Write offs			(406	)			—
Other			—				256
Balance at December 31, 2021		$	1,948			$	72,456

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Tabular disclosure of allowance for credit loss on financing receivable.

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