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Note 10 - Fair Value Measurements - Assets and Liabilities Measured on a Recurring Basis (Details) - Fair Value, Recurring [Member] - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Equity securities - common stock   $ 3,511
Fair Value, Inputs, Level 1 [Member]    
Equity securities - common stock   3,511
Fair Value, Inputs, Level 2 [Member]    
Equity securities - common stock   0
Fair Value, Inputs, Level 3 [Member]    
Equity securities - common stock   0
Interest Rate Swap [Member]    
Derivative liabilities $ (223) (199)
Interest Rate Swap [Member] | Fair Value, Inputs, Level 1 [Member]    
Derivative liabilities 0 0
Interest Rate Swap [Member] | Fair Value, Inputs, Level 2 [Member]    
Derivative liabilities (223) (199)
Interest Rate Swap [Member] | Fair Value, Inputs, Level 3 [Member]    
Derivative liabilities $ 0 $ 0