Note 10 - Derivative Instruments (Tables)

12 Months Ended

Dec. 31, 2024

Table Text Block [Abstract]

Schedule of Foreign Exchange Contracts, Statement of Financial Position

As of December 31, 2024 and 2023, we recorded the following balances for the fair value of the contracts (in millions):

	December 31,
Balance sheet line item:	2024			2023
Other current assets	$	—		$	2.7
Other non-current assets		—			2.0
Current derivative liabilities		(8.2	)		(1.1	)
Non-current derivative liabilities		(2.0	)		(0.4	)

Schedule of Notional Amounts of Outstanding Derivative Positions

The following tables summarize the quantities of metals committed under forward sales contracts at December 31, 2024 and 2023:

December 31, 2024	Ounces/pounds under contract (in 000's)								Average price per ounce/pound
	Silver		Gold		Zinc		Lead		Silver		Gold		Zinc		Lead
	(ounces)		(ounces)		(pounds)		(pounds)		(ounces)		(ounces)		(pounds)		(pounds)
Contracts on provisional sales
2025 settlements		1,535		2		20,834		14,661	$	31.46	$	2,673	$	1.40	$	0.97
Contracts on forecasted sales
2025 settlements		—		—		59,194		47,840	N/A		N/A		$	1.39	$	0.99
2026 settlements		—		—		6,283		52,911	N/A		N/A		$	1.41	$	1.03

December 31, 2023	Ounces/pounds under contract (in 000's)								Average price per ounce/pound
	Silver		Gold		Zinc		Lead		Silver		Gold		Zinc		Lead
	(ounces)		(ounces)		(pounds)		(pounds)		(ounces)		(ounces)		(pounds)		(pounds)
Contracts on provisional sales
2024 settlements		735		3		441		15,542	$	24.40	$	2,045	$	1.51	$	1.00
Contracts on forecasted sales
2024 settlements		—		—		—		56,713	N/A		N/A		N/A		$	0.98
2025 settlements		—		—		—		49,273	N/A		N/A		N/A		$	0.98

Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location

At December 31, 2024 and 2023, we recorded the following balances for the fair value of forward contracts held at that time (in millions):

	December 31, 2024						December 31, 2023
Balance sheet line item:	Contracts in an asset position		Contracts in a liability position		Net asset (liability)		Contracts in an asset position		Contracts in a liability position			Net asset (liability)
Other current assets	$	11.5	$	—	$	11.5	$	3.1	$	—		$	3.1
Other non-current assets		6.6		—		6.6		1.5		—			1.5
Current derivatives liability		—		—		—		—		(0.1	)		(0.1	)