Note 21 - Revenue Recognition - Noninterest Income (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017
Noninterest income (in-scope of Topic 606)		$ 3,376	$ 2,897
Noninterest income (out-of-scope of Topic 606)	[1]	832	2,125
Total noninterest income		4,208	5,022
Maintenance Fees [Member]
Noninterest income (in-scope of Topic 606)		160	158
Overdraft Fees [Member]
Noninterest income (in-scope of Topic 606)		1,587	1,318
Other Fees [Member]
Noninterest income (in-scope of Topic 606)		285	273
Electronic Banking Fees [Member]
Noninterest income (in-scope of Topic 606)		$ 1,344	$ 1,148

[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.