Note 13 - Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2023

Notes Tables

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

As of December 31, 2023
											Net Fair Value
	Quoted Prices in				Significant						Presented in the
	Active Markets for		Significant Other		Unobservable						Consolidated
	Identical Assets		Observable Inputs		Inputs		Total		Effect of		Balance
	(Level 1)		(Level 2)		(Level 3)		Fair Value		Netting		Sheet
	(in thousands)
Assets
Current:
Commodity derivatives	$	-	$	1,844	$	-	$	1,844	$	-	$	1,844
Net derivative instruments	$	-	$	1,844	$	-	$	1,844	$	-	$	1,844

As of December 31, 2022
														Net Fair Value
	Quoted Prices in					Significant								Presented in the
	Active Markets for		Significant Other			Unobservable								Consolidated
	Identical Assets		Observable Inputs			Inputs		Total			Effect of			Balance
	(Level 1)		(Level 2)			(Level 3)		Fair Value			Netting			Sheet
	(in thousands)
Assets
Current:
Commodity derivatives	$	-	$	488		$	-	$	488		$	(488	)	$	-
Liabilities
Current:
Commodity derivatives	$	-	$	(2,182	)	$	-	$	(2,182	)	$	488		$	(1,694	)
Net derivative instruments	$	-	$	(1,694	)	$	-	$	(1,694	)	$	-		$	(1,694	)

Fair Value, Assets Measured on Recurring Basis [Table Text Block]

	December 31,
	2023		2022
Number of shares owned		2,421,180		2,421,180
Quoted market price	$	0.06789	$	0.04429
Fair value	$	164,375	$	107,234