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Note 9 - Fair Value Measurements - Assets and Liabilities Measured on a Recurring Basis (Details) - Fair Value, Recurring [Member]
$ in Thousands
Sep. 30, 2023
USD ($)
Equity securities - common stock $ 3,788
Interest Rate Swap [Member]  
Derivative liabilities 126
Fair Value, Inputs, Level 1 [Member]  
Equity securities - common stock 3,788
Fair Value, Inputs, Level 1 [Member] | Interest Rate Swap [Member]  
Derivative liabilities 0
Fair Value, Inputs, Level 2 [Member]  
Equity securities - common stock 0
Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member]  
Derivative liabilities 126
Fair Value, Inputs, Level 3 [Member]  
Equity securities - common stock 0
Fair Value, Inputs, Level 3 [Member] | Interest Rate Swap [Member]  
Derivative liabilities $ 0