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Note 7 - Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Trust preferred stock   $ 3,675
Fair Value, Recurring [Member]    
Derivative instruments $ (3,665) (142)
Preferred stock and other equity instruments   33,450
Trust preferred stock   3,676
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]    
Derivative instruments (3,665) (142)
Preferred stock and other equity instruments   33,450
Trust preferred stock   3,676
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]    
Derivative instruments 0 0
Preferred stock and other equity instruments   0
Trust preferred stock   0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]    
Derivative instruments $ 0 0
Preferred stock and other equity instruments   0
Trust preferred stock   $ 0