Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Jan. 01, 2023	Dec. 31, 2021	Dec. 31, 2020
Cash and Due from Banks, Total	$ 26,588		$ 16,651
Loans Still Classified as Non-accrual Status, Period of Past Due (Day)	90 days
Financing Receivable Performance Period Under Loan Terms for Reclassification from Non-accrual Status (Month)	6 months
Outstanding Loans Balances That Are Considered to Be Within Homogeneous Pools and Not Individually Evaluated for Impairment, Maximum	$ 100
Minimum Balance of Impaired Loan Relationships That Are Individually Evaluated for Impairment	100
Unrecognized Tax Benefits, Ending Balance	0		0
Financing Receivable, Allowance for Credit Loss, Ending Balance	14,193		12,416	$ 11,950
Stockholders' Equity Attributable to Parent, Ending Balance	118,949		162,457	$ 155,860
Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Accounting Standards Update 2016-13 [Member] | Subsequent Event [Member] | Minimum [Member]
Financing Receivable, Allowance for Credit Loss, Ending Balance		$ 11,500
Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Accounting Standards Update 2016-13 [Member] | Subsequent Event [Member] | Maximum [Member]
Financing Receivable, Allowance for Credit Loss, Ending Balance		11,800
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member] | Subsequent Event [Member] | Minimum [Member]
Financing Receivable, Allowance for Credit Loss, Ending Balance		(2,400)
Stockholders' Equity Attributable to Parent, Ending Balance		1,900
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member] | Subsequent Event [Member] | Maximum [Member]
Financing Receivable, Allowance for Credit Loss, Ending Balance		(2,600)
Stockholders' Equity Attributable to Parent, Ending Balance		$ 2,100
Other Liabilities [Member] | Guaranteed Minimum Death Benefit [Member]
Net Amount at Risk by Product and Guarantee, Net Amount at Risk	101		99
Compensating Balances at Correspondent Banks to Offset Specific Charges for Services [Member]
Cash and Due from Banks, Total	$ 2,100		$ 1,700