Note 7 - Revenue Recognition - Noninterest Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Noninterest Income (in-scope of Topic 606)	$ 1,903	$ 1,842
Noninterest Income (out-of-scope of Topic 606)	296	357
Total noninterest income	2,199	2,199
Deposit Account [Member]
Noninterest Income (in-scope of Topic 606)	675	592
Product and Service, Other [Member]
Noninterest Income (in-scope of Topic 606)	46	53
Credit and Debit Card [Member]
Noninterest Income (in-scope of Topic 606)	374	467
Fiduciary and Trust [Member]
Noninterest Income (in-scope of Topic 606)	503	445
Insurance and Investment [Member]
Noninterest Income (in-scope of Topic 606)	$ 305	$ 285