Note 7 - Borrowed Funds (Details Textual) - USD ($) $ in Thousands		3 Months Ended	9 Months Ended
	May 12, 2023	Sep. 30, 2023	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Federal Home Loan Bank, Advance, Maturity, Year One		$ 15,000	$ 15,000
Proceeds from Short-Term Debt			13,000	$ 0
Residential Mortgage Segment [Member]
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged		36,100	36,100
US Treasury Securities [Member]
Investment Owned, Face Amount		42,400	42,400
Federal Reserve Bank Advances [Member]
Short-Term Debt		13,000	13,000		$ 0
Proceeds from Short-Term Debt	$ 13,000	0	0
Debt Instrument, Interest Rate, Stated Percentage	4.99%
Debt Instrument, Term (Year)	1 year
Federal Reserve Bank Advances [Member] | Asset Pledged as Collateral [Member]
Investment Owned, Balance, Principal Amount		48,900	48,900
Investment Owned, Fair Value		$ 44,700	$ 44,700