Note 7 - Derivative Instruments (Tables)

6 Months Ended

Jun. 30, 2025

Notes Tables

Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block]

Settlement Dates	Volume
	Electricity (in MWH)		Gas (in Dth)
Third quarter of 2025		37,520		152,500
Fourth quarter of 2025		—		1,070,001
First quarter of 2026		—		1,350,000
Second quarter of 2026		—		—
Third quarter of 2026		9,152		—
Fourth quarter of 2026		—		152,500
First quarter of 2027		—		225,000
Second quarter of 2027		—		—
Third quarter of 2027		3,440		—

Derivatives Not Designated as Hedging Instruments [Table Text Block]

		June 30,		December 31,
Asset Derivatives	Balance Sheet Location	2025		2024
		(in thousands)
Derivatives not designated or not qualifying as hedging instruments:
Energy contracts and options1	Other current assets	$	146	$	583
Energy contracts and options	Other assets		352		285
Total derivatives not designated or not qualifying as hedging instruments — Assets		$	498	$	868

		June 30,		December 31,
Liability Derivatives	Balance Sheet Location	2025		2024
		(in thousands)
Derivatives not designated or not qualifying as hedging instruments:
Energy contracts and options1	Other current liabilities	$	1,325	$	428
Energy contracts and options	Other liabilities		56		45
Total derivatives not designated or not qualifying as hedging instruments — Liabilities		$	1,381	$	473

		Amount of Loss Recognized on Derivatives
Derivatives not designated or not qualifying as	Location of Gain	Three Months Ended June 30,				Six Months Ended June 30,
hedging instruments	Recognized on Derivatives	2025		2024		2025		2024
		(in thousands)				(in thousands)
Energy contracts and options	Cost of revenues	$	3,992	$	8,404	$	818	$	13,936