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Note 11 - Fair Value Measurement - Assets and Liabilities Accounted for at Fair Value (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Other, net | $ 18,376 | $ 10,695
Fair Value, Recurring [Member] |  |
Total assets | 163,918 | 177,898
Total liabilities | 1,548 | 22,191
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] |  |
Money market funds and other bank deposits | 106,374 | 104,743
Equity securities – mining industry | 32,284 | 24,018
Certificates of deposit and other deposits | 1,165 | 1,164
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] |  |
Other, net | 14,740 | 45,146
Metal forward contracts | 4,698 | $ 1,309
Derivative Asset, Statement of Financial Position [Extensible Enumeration] |  | Assets
Foreign exchange contracts | 4,657 | $ 1,518
Metal forward contracts | $ 40 | $ 14,643
Derivative Liability, Statement of Financial Position [Extensible Enumeration] | Liabilities | Liabilities
Foreign exchange contracts | $ 1,508 | $ 7,548

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- Definition A savings certificate entitling the Entity (that is, bearer) to receive interest at an established maturity date, based upon a fixed interest rate. A certificate of deposit may be issued in any denomination. Certificates of deposit are generally issued by commercial banks and, therefore, insured by the FDIC (up to the prescribed limit). Certificates of deposit generally restrict holders from withdrawing funds on demand without the incurrence of penalties. Generally, only certificates of deposit with original maturities of three months or less qualify as cash equivalents. Original maturity means original maturity to the entity holding the investment. As a related example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(1)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
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