Note 20 - Litigation, Commitments, and Contingencies - Off-balance Sheet Financial Instruments (Details) - USD ($) $ in Thousands		Dec. 31, 2019	Dec. 31, 2018
Commitments to extend credit		$ 228,716	$ 215,239
Standby letters of credit and financial guarantees(1)	[1]	167,612	149,494
Total off-balance sheet risk		396,328	364,733
Reserve for unfunded commitments		$ 66	$ 66

[1] Includes FHLB letters of credit