Note 17 - Revenue from Contracts with Customers - Summary of Revenue (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues		$ 9,443	$ 8,322	$ 28,569	$ 23,957
Noninterest income, not in-scope(2)	[1]	2,773	1,655	6,230	7,412
Total non-interest income		12,216	9,977	34,799	31,369
Fees and Services Charges on Deposit Account [Member]
Revenues		2,130	2,018	6,386	5,945
Wealth Management Fees [Member]
Revenues		3,578	2,628	11,074	7,974
Other Service Fees [Member]
Revenues	[2]	$ 3,735	$ 3,676	$ 11,109	$ 10,038

[1] These amounts primarily represent revenue from contracts with customers that are out of the scope of ASC 606.

[2] Other service fees is comprised of fees related to letters of credit, wire fees, fees on foreign exchange transactions and other immaterial individual revenue streams.