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Note 1 - Summary of Significant Accounting Policies (Details Textual) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Jan. 01, 2023 USD ($)	Dec. 31, 2021 USD ($)
Number of Operating Segments	1
Time Deposit, Maturity	6 years
Goodwill, Impairment Loss	$ 0	$ 0
Retained Earnings (Accumulated Deficit)	180,438	179,931
Deferred income taxes, net	16,496	22,130
Financing Receivable, Allowance for Credit Loss	$ 16,776	15,697		$ 16,621
Accounting Standards Update 2016-13 [Member]
Financing Receivable, Allowance for Credit Loss			$ 15,697
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]
Retained Earnings (Accumulated Deficit)			(603)
Deferred income taxes, net			188
Financing Receivable, Allowance for Credit Loss		$ 518	518	$ 0
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member] | OBS Credit Exposures [Member]
Financing Receivable, Allowance for Credit Loss			$ 273
Equipment [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life	3 years
Equipment [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life	7 years
Building [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life	15 years
Building [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life	40 years
Accrued Interest Receivable [Member]
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss	$ 3,500
Financing Receivable, Accrued Interest, after Allowance for Credit Loss	$ 9,400

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