Note 2 - Revenue Recognition - Disaggregation of Revenue (Details) - USD ($)		3 Months Ended		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Gain on equity securities	[1]	$ (57,000)	$ 102,000	$ (96,000)	$ 223,000
Earnings on bank-owned life insurance	[1]	108,000	108,000	322,000	440,000
Gain on sale of loans	[1]	7,000	309,000	28,000	1,122,000
Revenue from investment services		233,000	190,000	527,000	529,000
Miscellaneous Fee income		83,000	75,000	222,000	192,000
Other income		168,000	161,000	455,000	646,000
Total noninterest income		1,546,000	1,821,000	4,332,000	5,671,000
Net gain on other real estate owned	[2]	1,000	9,000	215,000	77,000
Overdraft Fees [Member]
Noninterest income revenue		237,000	192,000	661,000	523,000
ATM Banking Fees [Member]
Noninterest income revenue		397,000	354,000	1,065,000	1,026,000
Service Charge and Other Fees [Member]
Noninterest income revenue		$ 370,000	$ 330,000	$ 1,148,000	$ 970,000

[1] Not within scope of ASC 606

[2] Recognized within noninterest expense