Note 7 - Revenue Recognition - Noninterest Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Noninterest Income (in-scope of Topic 606)	$ 1,842	$ 1,708
Noninterest Income (out-of-scope of Topic 606)	357	583
Total noninterest income	2,199	2,291
Deposit Account [Member]
Noninterest Income (in-scope of Topic 606)	592	562
Product and Service, Other [Member]
Noninterest Income (in-scope of Topic 606)	53	55
Credit and Debit Card [Member]
Noninterest Income (in-scope of Topic 606)	467	440
Fiduciary and Trust [Member]
Noninterest Income (in-scope of Topic 606)	445	443
Insurance and Investment [Member]
Noninterest Income (in-scope of Topic 606)	$ 285	$ 208