Note 8 - Derivative Instruments (Tables)

3 Months Ended

Mar. 31, 2024

Table Text Block [Abstract]

Schedule of Foreign Exchange Contracts, Statement of Financial Position [Table Text Block]

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

	March 31,			December 31,
Balance sheet line item:	2024			2023
Other current assets	$	0.4		$	2.7
Other non-current assets	$	0.3		$	2.0
Other current liabilities	$	(3.1	)	$	(1.1	)
Other non-current liabilities	$	(1.2	)	$	(0.4	)

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

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

March 31, 2024	Ounces/pounds under contract (in 000's except gold)							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		2,617		9,060	-		12,015	$	24.81	$	2,165	N/A	$	0.98
Contracts on forecasted sales
2024 settlements	-		-		-		45,691	N/A		N/A		N/A	$	0.98
2025 settlements	-		-		-		43,541	N/A		N/A		N/A	$	0.98

December 31, 2023	Ounces/pounds under contract (in 000's except gold)								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
2023 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 [Table Text Block]

We recorded the following balances for the fair value of the forward metals contracts as of March 31, 2024 and December 31, 2023 (in millions):

	March 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	$	2.4	$	—	$	2.4	$	3.1	$	—		$	3.1
Other non-current assets	$	0.8	$	—	$	0.8	$	1.5	$	—		$	1.5
Other current liabilities	$	—	$	—	$	—	$	—	$	(0.1	)	$	(0.1	)
Other non-current liabilities	$	—	$	—	$	—	$	—	$	—		$	—