Note 1 - General (Details Textual) - USD ($) $ in Thousands	Sep. 30, 2023	Jan. 01, 2023	Dec. 31, 2022	Sep. 30, 2022	Dec. 31, 2021
Retained Earnings (Accumulated Deficit)	$ 198,394		$ 199,091
Financing Receivable, Allowance for Credit Loss	10,181		8,225	$ 8,207	$ 7,674
Unfunded Loan Commitment [Member]
Financing Receivable, Allowance for Credit Loss	$ 263		35
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]
Retained Earnings (Accumulated Deficit)		$ 2,014
Financing Receivable, Allowance for Credit Loss		10,567	2,342
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member] | Unfunded Loan Commitment [Member]
Financing Receivable, Allowance for Credit Loss		242	$ 207
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member] | Previously Reported [Member]
Financing Receivable, Allowance for Credit Loss		8,225
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member] | Previously Reported [Member] | Unfunded Loan Commitment [Member]
Financing Receivable, Allowance for Credit Loss		$ 35