Note 4 - Loans Receivable, Net (Details Textual)	12 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Financing Receivable, 90 Days or More Past Due, Still Accruing	$ 0	$ 0
Financing Receivable, Nonaccrual	$ 6,825,000	$ 6,272,000
Financing Receivable, Number of Loans Modified	2	2
Financing Receivable, Modified, Accumulated	$ 342,000	$ 385,000
Financing Receivable, Modified in Period, Amount	$ 0	$ 0
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts	0	0
Commercial Portfolio Segment [Member]
Financing Receivable, Nonaccrual, Review Limit	$ 200,000
Consumer Portfolio Segment [Member]
Financing Receivable, Nonaccrual, Review Limit	100,000
Financial Asset, Not Past Due [Member]
Financing Receivable, Nonaccrual	5,000,000
Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Nonaccrual	472,000
Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Nonaccrual	$ 123,000