Note 2 - New Accounting Pronouncements (Details Textual) - USD ($) $ in Thousands	Mar. 31, 2023		Jan. 01, 2023	Dec. 31, 2022		Mar. 31, 2022	Dec. 31, 2021
Retained Earnings (Accumulated Deficit)	$ 123,416			$ 119,754
Financing Receivable, Allowance for Credit Loss	17,910			17,149		$ 16,081	$ 15,624
Off-Balance-Sheet, Credit Loss, Liability	1,334			49		$ 52	63
Financing Receivable, before Allowance for Credit Loss	1,626,999	[1],[2]		1,564,174	[3],[4]
Loans Receivable with Variable Rates of Interest	$ 35,000
Cumulative Effect, Period of Adoption, Adjustment [Member]
Financing Receivable, Allowance for Credit Loss				618
Off-Balance-Sheet, Credit Loss, Liability				$ 1,060			$ 0
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]
Retained Earnings (Accumulated Deficit)			$ (1,300)
Financing Receivable, Allowance for Credit Loss			(500)
Off-Balance-Sheet, Credit Loss, Liability			(800)
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, before Allowance for Credit Loss			$ 100

[1] Includes $4.8 million of net deferred loan costs.

[2] Includes net deferred loan costs of $4.8 million.

[3] Includes $4.6 million of net deferred loan costs.

[4] Includes net deferred loan costs of $4.6 million.