Note 4 - Environmental and Reclamation Activities (Tables)

12 Months Ended

Dec. 31, 2022

Environmental and Reclamation Activities [Abstract]

Schedule of Reclamation and Closure Costs Liabilities

	2022			2021
Operating properties:
Greens Creek	$	37,212		$	37,474
Lucky Friday		13,343			13,543
Keno Hill		4,514			—
Casa Berardi		11,352			12,497
Nevada Operations		28,171			27,068
Non-operating properties:
San Sebastian		1,989			4,451
Troy mine		6,980			4,813
Johnny M		8,961			8,947
All other sites		4,477			4,438
Total		116,999			113,231
Reclamation and closure costs, current		(8,591	)		(9,259	)
Reclamation and closure costs, long-term	$	108,408		$	103,972

Schedule of Reclamation and Closure Costs Activities

Balance at January 1, 2020	$	108,374
Accretion expense		5,912
Revision of estimated cash flows due to changes in reclamation plans		2,543
Payment of reclamation obligations		(781	)
Balance at December 31, 2020		116,048
Accruals for estimated costs		4,952
Accretion expense		6,454
Revision of estimated cash flows due to changes in reclamation plans		(8,781	)
Payment of reclamation obligations		(5,442	)
Balance at December 31, 2021		113,231
Accruals for estimated costs		2,874
Accretion expense		5,995
Revision of estimated cash flows due to changes in reclamation plans		452
Payment of reclamation obligations		(5,553	)
Balance at December 31, 2022	$	116,999

Schedule of Change in Asset Retirement Obligation

	2022			2021
Balance January 1	$	95,033		$	100,208
Changes in obligations due to changes in reclamation plans		452			(8,781	)
Accretion expense		5,995			6,451
Payment of reclamation obligations		(4,860	)		(2,845	)
Balance at December 31	$	96,620		$	95,033