Note 2 - Revenue Recognition - Disaggregation of Revenue (Details) - USD ($)		3 Months Ended
		Mar. 31, 2025	Mar. 31, 2024
Loss on equity securities	[1]	$ (34,000)	$ (52,000)
Earnings on bank-owned life insurance	[1]	493,000	227,000
Gain on sale of loans	[1]	24,000	10,000
Revenue from investment services		268,000	204,000
Miscellaneous fee income		95,000	93,000
Gross rental income	[1]	0	67,000
Other income		109,000	338,000
Total noninterest income		1,944,000	1,796,000
Overdraft Fees [Member]
Noninterest income revenue		261,000	250,000
ATM Banking Fees [Member]
Noninterest income revenue		432,000	439,000
Service Charge and Other Fees [Member]
Noninterest income revenue		$ 296,000	$ 220,000

[1] Not within scope of ASC 606