Note 4 - Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

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

	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
Total recurring fair value measurements	$	—	$	(15,467	)	$	—	$	(15,467	)