Note 9 - Revenue From Contracts With Customers - Noninterest Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Noninterest income	$ 1,856	$ 1,654	$ 5,283	$ 4,738
Net gains (losses) on loans and investments	(59)	536	455	2,267
Increase in cash value of life insurance	44	51	157	169
Other	32	29	90	86
Other noninterest income	17	616	702	2,522
Total noninterest income	1,873	2,270	5,985	7,260
Deposit Account [Member]
Noninterest income	618	514	1,670	1,348
ATM and Debit Card Fees [Member]
Noninterest income	1,059	1,009	3,132	3,027
Investment Advisory, Management and Administrative Service [Member]
Noninterest income	160	103	400	272
Product and Service, Other [Member]
Noninterest income	$ 19	$ 28	$ 81	$ 91