Note 10 - Revenue Recognition - Noninterest Income (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Noninterest income (in-scope of Topic 606)		$ 659	$ 907	$ 1,442	$ 1,786
Noninterest income (out-of-scope of Topic 606) (2)	[1]	719	224	961	402
Total noninterest income		1,378	1,131	2,403	2,188
Maintenance Fees [Member]
Noninterest income (in-scope of Topic 606)		48	42	100	82
Overdraft Fees [Member]
Noninterest income (in-scope of Topic 606)		180	412	508	850
Other Fees [Member]
Noninterest income (in-scope of Topic 606)		60	82	130	159
Electronic Banking Fees [Member]
Noninterest income (in-scope of Topic 606)	[2]	$ 371	$ 371	$ 704	$ 695

[1] Noninterest income items that are out-of-scope include net realized gains (losses) on sales of securities, net gains (losses) on sales of loans, earnings on bank-owned life insurance and certain other noninterest income items.

[2] Included in other noninterest income on the consolidated statement of income.