Note 8 - FAIR VALUE - Changes in fair values of trading securites (Details) - Trading securities - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at the beginning of the period	$ 22,362		$ 22,369
Trading securities purchased	36,670		36,670
Fair value gain (loss)	$ (347)		$ (354)
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Fair Value Gain Loss On Derivatives An Trading Securities	Fair Value Gain Loss On Derivatives An Trading Securities	Fair Value Gain Loss On Derivatives An Trading Securities	Fair Value Gain Loss On Derivatives An Trading Securities
Balance at the end of the period	$ 58,685		$ 58,685

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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