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Note 3 - Available-for-sale Securities (Details Textual) $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions	37		32
Number of Available-for-sale Securities	39		39
Unrealized Holding Losses Depreciation Percentage from Amortized Cost	10.70%		2.70%
Other-than-temporary Impairment Loss, Debt Securities, Available-for-sale, Total	$ 0
Payments to Acquire Debt Securities, Available-for-Sale	1,000	$ 13,901
Proceeds from Sale of Debt Securities, Available-for-Sale	0	0
US States and Political Subdivisions Debt Securities [Member]
Payments to Acquire Debt Securities, Available-for-Sale	1,000
Mortgage-Backed Securities, Issued by US Government Sponsored Enterprises [Member]
Payments to Acquire Debt Securities, Available-for-Sale		10,900
SBA Loan Pools [Member]
Payments to Acquire Debt Securities, Available-for-Sale		$ 3,000
Asset Pledged as Collateral [Member] | Federal Home Loan Bank Advances [Member]
Debt Securities, Available-for-Sale, Restricted	$ 32,800		$ 36,600

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- Definition

The number of available-for-sale securities held.

+ References

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

+ References

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Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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Amount of other-than-temporary impairment (OTTI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), recognized in earnings and other comprehensive loss (OCI).

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Amount of cash outflow to acquire 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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