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Note 7 - Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Trust preferred stock	$ 3,839	$ 3,902
Fair Value, Recurring [Member]
Derivative instruments	1,051	(485)
Preferred stock and other equity instruments	38,912	43,288
Trust preferred stock	3,839	3,902
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Derivative instruments	1,051	(485)
Preferred stock and other equity instruments	38,912	43,288
Trust preferred stock	3,839	3,902
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Derivative instruments	0	0
Preferred stock and other equity instruments	0	0
Trust preferred stock	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Derivative instruments	0	0
Preferred stock and other equity instruments	0	0
Trust preferred stock	$ 0	$ 0

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- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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- Definition

Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current.

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