Note 18 - Revenue from Contracts with Customers - Summary of Revenue (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenues		$ 8,322	$ 7,586	$ 23,957	$ 22,791
Noninterest income, not in-scope(2)	[1]	1,655	2,802	7,412	13,312
Total noninterest income		9,977	10,388	31,369	36,103
Fees and Services Charges on Deposit Account [Member]
Revenues		2,018	1,892	5,945	5,940
Wealth Management Fees [Member]
Revenues		2,628	2,049	7,974	6,258
Other Service Fees [Member]
Revenues	[2]	$ 3,676	$ 3,645	$ 10,038	$ 10,593

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

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