Note 1 - Organization and Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2023

Notes Tables

Oil and Gas, Average Sale Price and Production Cost [Table Text Block]

Average Brent Prices	2023		2022
First Quarter	$	81.07	$	100.87
Second Quarter	$	77.99	$	113.84
Third Quarter	$	—	$	100.71
Fourth Quarter	$	—	$	88.72

Schedule of Cash, Cash Equivalents and Restricted Cash [Table Text Block]

	As of June 30,
	2023		2022
	(in thousands)
Cash and cash equivalents	$	46,186	$	53,062
Restricted cash - current		113		216
Restricted cash - non-current		1,779		1,752
Abandonment funding		6,268		20,091
Total cash, cash equivalents and restricted cash	$	54,346	$	75,121

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

	Three Months Ended June 30,						Six Months Ended June 30,
	2023			2022			2023			2022
	(in thousands)
Allowance for credit losses and other
Balance at beginning of period	$	(12,832	)	$	(6,135	)	$	(8,704	)	$	(5,741	)
Credit loss charges and other, net of receipts		(680	)		(571	)		(1,615	)		(1,063	)
Cumulative effect of adjustment upon adoption of ASU 2016-13 on January 1, 2023		—			—			(3,120	)		—
Foreign currency gain (loss)		(7	)		317			(80	)		415
Balance at end of period	$	(13,519	)	$	(6,389	)	$	(13,519	)	$	(6,389	)

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

		As of June 30, 2023
	Balance Sheet Line	Level 1		Level 2		Level 3		Total
		(in thousands)
Assets
Derivative asset	Prepayments and other	$	—	$	158	$	—	$	158
		$	—	$	158	$	—	$	158
Liabilities
SARs liability	Accrued liabilities and other	$	—	$	196	$	—	$	196
		$	—	$	196	$	—	$	196

`		As of December 31, 2022
	Balance Sheet Line	Level 1		Level 2		Level 3		Total
		(in thousands)
Assets
Derivative asset	Prepayments and other	$	—	$	102	$	—	$	102
		$	—	$	102	$	—	$	102
Liabilities
SARs liability	Accrued liabilities and other	$	—	$	556	$	—	$	556
		$	—	$	556	$	—	$	556