Note 2 - Revenue Recognition - Disaggregation of Revenue (Details) - USD ($)		3 Months Ended		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Gain on equity securities	[1]	$ (72,000)	$ 40,000	$ (39,000)	$ 121,000
Earnings on bank-owned life insurance	[1]	108,000	106,000	214,000	332,000
Gain on sale of loans	[1]	18,000	221,000	21,000	813,000
Revenue from investment services		153,000	212,000	294,000	339,000
Miscellaneous Fee income		76,000	63,000	139,000	125,000
Other income		144,000	134,000	287,000	477,000
Total noninterest income		1,383,000	1,632,000	2,786,000	3,850,000
Net loss on other real estate owned	[2]	206,000	22,000	214,000	68,000
Overdraft Fees [Member]
Noninterest income revenue		223,000	163,000	424,000	331,000
ATM Banking Fees [Member]
Noninterest income revenue		359,000	360,000	668,000	672,000
Service Charge and Other Fees [Member]
Noninterest income revenue		$ 374,000	$ 333,000	$ 778,000	$ 640,000

[1] Not within scope of ASC 606

[2] Recognized within noninterest expense