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Note 6 - Fair Value Measurements - Balances of Assets Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Sep. 01, 2022	Dec. 31, 2021
Fair value, available for sale securities	$ 176,403	$ 74,400	$ 289,495
Fair Value, Recurring [Member]
Fair value, available for sale securities	176,403		289,495
Derivatives - cash flow hedges	2,723		941
Assets, Fair Value	179,126		290,436
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value, available for sale securities	0		0
Derivatives - cash flow hedges	0		0
Assets, Fair Value	0		0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value, available for sale securities	176,403		289,495
Derivatives - cash flow hedges	2,723		941
Assets, Fair Value	179,126		290,436
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value, available for sale securities	0		0
Derivatives - cash flow hedges	0		0
Assets, Fair Value	0		0
US Treasury Securities [Member]
Fair value, available for sale securities	17,531		39,658
US Treasury Securities [Member] | Fair Value, Recurring [Member]
Fair value, available for sale securities	17,531		39,658
US Treasury Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value, available for sale securities	0		0
US Treasury Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value, available for sale securities	17,531		39,658
US Treasury Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value, available for sale securities	0		0
US Agency and Mortgage-backed Securities [Member]
Fair value, available for sale securities	106,303		176,379
US Agency and Mortgage-backed Securities [Member] | Fair Value, Recurring [Member]
Fair value, available for sale securities	106,303		176,379
US Agency and Mortgage-backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value, available for sale securities	0		0
US Agency and Mortgage-backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value, available for sale securities	106,303		176,379
US Agency and Mortgage-backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value, available for sale securities	0		0
Municipal Bonds [Member] | Fair Value, Recurring [Member]
Fair value, available for sale securities	52,569		71,438
Municipal Bonds [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value, available for sale securities	0		0
Municipal Bonds [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value, available for sale securities	52,569		71,438
Municipal Bonds [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value, available for sale securities	$ 0		0
Corporate Debt Securities [Member]
Fair value, available for sale securities			2,020
Corporate Debt Securities [Member] | Fair Value, Recurring [Member]
Fair value, available for sale securities			2,020
Corporate Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value, available for sale securities			0
Corporate Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value, available for sale securities			2,020
Corporate Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value, available for sale securities			$ 0

X

- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
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+ References

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-Name Accounting Standards Codification
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-SubTopic 210
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