Note 4 - Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

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

	As of December 31, 2022
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)		Total
Assets:
Commodity price derivatives	$	—	$	17		$	—	$	17
Liabilities:
Commodity price derivatives – current		—		16,702			—		16,702
Commodity price derivatives – noncurrent		—		691			—		691
Total liabilities		—		17,393			—		17,393
Net recurring fair value measurements	$	—	$	(17,376	)	$	—	$	(17,376	)

	As of December 31, 2021
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)		Total
Assets:
Commodity price derivatives	$	—	$	2,199		$	—	$	2,199
Liabilities:
Commodity price derivatives – current		—		13,591			—		13,591
Commodity price derivatives – noncurrent		—		4,075			—		4,075
Total liabilities		—		17,666			—		17,666
Net recurring fair value measurements	$	—	$	(15,467	)	$	—	$	(15,467	)

Fair Value, by Balance Sheet Grouping [Table Text Block]

	As of December 31, 2022				As of December 31, 2021
	Carrying Value		Fair Value		Carrying Value		Fair Value
Liabilities:
Long-term debt:
10.000% Senior Notes (a)	$	225,000	$	225,000	$	—	$	—
10.625% Senior Notes (a)	$	250,000	$	250,000	$	—	$	—