Note 8 - Subsequent Events (Details Textual) - Reverse Stock Split [Member]	Apr. 27, 2021
Stockholders' Equity Note, Stock Split, Conversion Ratio	6
Subsequent Event [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	6

Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SAB TOPIC 4.C)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187143-122770

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