Note 13 - Revenue Recognition - Non-interest Income Segregated by Revenue Streams (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Non-interest income	$ 3,224	$ 2,036	$ 7,712	$ 5,625
Non-interest income (out-of-scope of Topic 606)	6,807	4,518	17,288	12,900
Total non-interest income	10,031	6,554	25,000	18,525
Deposit Account [Member]
Non-interest income	2,134	1,990	6,166	5,450
Other Non-interest Income From Customers [Member]
Non-interest income	$ 1,090	$ 46	$ 1,546	$ 175