Note 8 - Revenue Recognition - Noninterest Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Noninterest Income (in-scope of Topic 606)	$ 1,568	$ 1,278	$ 3,326	$ 2,737
Noninterest Income (out-of-scope of Topic 606)	373	467	949	1,143
Total noninterest income	1,941	1,745	4,275	3,880
Deposit Account [Member]
Noninterest Income (in-scope of Topic 606)	471	377	940	959
Product and Service, Other [Member]
Noninterest Income (in-scope of Topic 606)	43	37	84	76
Credit and Debit Card [Member]
Noninterest Income (in-scope of Topic 606)	479	386	913	692
Fiduciary and Trust [Member]
Noninterest Income (in-scope of Topic 606)	434	387	849	821
Insurance and Investment [Member]
Noninterest Income (in-scope of Topic 606)	$ 141	$ 91	$ 540	$ 189