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Note 4 -Business Segments, Sales of Products and Significant Customers - Schedule of Sales Information by Geographic Area (Details) - USD ($) $ in Thousands | 12 Months Ended
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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

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