Note 7 - Borrowed Funds (Details Textual) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	Jan. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Feb. 28, 2024	Dec. 31, 2023
Federal Home Loan Bank, Advances, General Debt Obligations, Maximum Amount Available			$ 49,300
Residential Mortgage Segment [Member]
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged			44,200
US Treasury Securities [Member]
Investment Owned, Face Amount			30,200
Overdraft Line Of Credit Expiring February 28, 2025 [Member]
Federal Home Loan Bank Overdraft, Line of Credit				$ 10,000
Federal Home Loan Bank, Overdraft, Line Of Credit, Borrowings Outstanding			0
Federal Reserve Bank Advances [Member]
Short-Term Debt			33,600		$ 21,500
Federal Home Loan Bank, Advance, Maturity, Year One			0		$ 0
Proceeds from Short-Term Debt	$ 33,600	$ 0
Debt Instrument, Interest Rate, Stated Percentage	4.85%
Debt Instrument, Term (Year)	1 year
Federal Reserve Bank Advances [Member] | Asset Pledged as Collateral [Member]
Investment Owned, Balance, Principal Amount			48,900
Investment Owned, Fair Value			$ 45,900