Note 8 - Commitments - Fair Values of Derivative Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Interest rate derivatives, assets	$ 4,239	$ 1,422
Interest rate derivatives, liabilities	4,239	1,422
Other Assets [Member]
Interest rate derivatives, assets	4,239	1,422
Other Liabilities [Member]
Interest rate derivatives, liabilities	$ 4,239	$ 1,422

Fair value as of the balance sheet date of all derivative liabilities not designated as hedging instruments.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624163-113959

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant