Note 4 -Business Segments, Sales of Products and Significant Customers - Schedule of Sales Information by Geographic Area (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Sales by significant product type	$ 908,079	$ 695,267	$ 724,255
Doré and Metals from Doré [Member]
Segment Reporting Information [Line Items]
Sales by significant product type	238,124	211,321	255,608
Carbon [Member]
Segment Reporting Information [Line Items]
Sales by significant product type	7,670	4,333	2,607
Silver Concentrate [Member]
Segment Reporting Information [Line Items]
Sales by significant product type	493,584	356,941	329,165
Zinc Concentrate [Member]
Segment Reporting Information [Line Items]
Sales by significant product type	111,101	80,274	109,177
Precious Metals Concentrate [Member]
Segment Reporting Information [Line Items]
Sales by significant product type	57,600	42,398	27,698
UNITED STATES
Segment Reporting Information [Line Items]
Sales by significant product type	41,079	36,307	21,938
CANADA
Segment Reporting Information [Line Items]
Sales by significant product type	457,423	375,092	406,600
JAPAN
Segment Reporting Information [Line Items]
Sales by significant product type	44,561	52,744	51,375
KOREA
Segment Reporting Information [Line Items]
Sales by significant product type	181,372	127,590	107,828
CHINA
Segment Reporting Information [Line Items]
Sales by significant product type	$ 183,644	$ 103,534	$ 136,514