Note 12 - Long-term Debt (Details Textual) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Advances from Federal Home Loan Banks, Total	$ 10	$ 10
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Interest Rate	0.819%

Discloses the single interest rate [if] applicable to the advances from the Federal Home Loan Bank, by branch, as of the Balance Sheet date.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123599511&loc=d3e64711-112823

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant