Note 4 - Derivative Instruments (Tables)

12 Months Ended

Dec. 31, 2024

Notes Tables

Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location [Table Text Block]

	For the Year Ended December 31,
Location on Consolidated Balance Sheet	2024			2023
Prepaid expenses and other current assets (1), (2)	$	207	$	—
	$	207	$	—

Derivative Instruments, Gain (Loss) [Table Text Block]

	For the Year Ended December 31,
Changes in fair value of derivatives	2024			2023
Fair value of natural gas derivatives, beginning of period	$	—		$	572
Purchases of natural gas derivatives		359			—
Realized gains (losses), net		(462	)		(1,113	)
Change in unrealized gain (loss) on natural gas derivatives (1)		310			541
Fair value of natural gas derivatives, end of year	$	207		$	—

	For the Year Ended December 31,
Realized gain (loss) from derivative instruments	2024			2023
Realized gains (losses), net	$	(462	)	$	(1,113	)
Derivative settlement payments receivable(ed)		22			—
Total realized gain (loss) from natural gas derivatives, net (2)	$	(440	)	$	(1,113	)