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Note 7 - Financial Instruments (Details Textual) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Other Investments, Fair Value Disclosure	$ 40,331	$ 72,217
Margin Loan Collateral [Member]
Other Investments, Fair Value Disclosure	821	946
Share Forward Arrangements [Member]
Equity Securities, FV-NI	2,284	26,079
Derivative Asset	804	1,447
Accounts Receivable, Fair Value Disclosure	$ 2,538	$ 6,278

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