Note 21 - Accumulated Other Comprehensive Income (Loss) (Details Textual) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
AOCI, Debt Securities, Available-for-sale, Adjustment, after Tax, Total	$ 5.5	$ 3.7

Amount, after tax, of accumulated unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14
-URI http://asc.fasb.org/extlink&oid=121641772&loc=d3e681-108580

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