Note 11 - Leases (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2026	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Lease, Expense						$ 31,000	$ 30,000	$ 58,000
Operating Lease, Lease Income, Total						$ 39,000	30,000	$ 27,000
Forecast [Member]
Operating Lease, Lease Income, Lease Payments	$ 7,000	$ 20,000	$ 38,000	$ 51,000	$ 50,000
Minimum [Member]
Lessee, Operating Lease, Renewal Term (Year)						1 year
Maximum [Member]
Lessee, Operating Lease, Renewal Term (Year)						20 years
Other Assets [Member]
Operating Lease, Right-of-Use Asset						$ 60,000	77,000
Other Liabilities [Member]
Operating Lease, Liability, Total						$ 60,000	77,000
Branch Office Space [Member]
Lessee, Operating Lease, Annual Lease Payments							$ 19,000