Note 17 - Derivative Financial Instruments - Offset Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Gross amount of recognized liabilities	$ 1,358	$ 196
Gross amounts offset in the statement of financial condition
Net amount of liabilities present in the statement of financial condition	1,358	196
Financial instruments
Cash collateral pledged	2,290
Net amount	(932)	(196)
Net amount	932	196
Interest Rate Swap [Member]
Gross amount of recognized liabilities	1,358	196
Gross amounts offset in the statement of financial condition
Net amount of liabilities present in the statement of financial condition	1,358	196
Financial instruments
Cash collateral pledged	2,290
Net amount	(932)	(196)
Net amount	$ 932	$ 196