Note 2 - Basis of Presentation (Details Textual)	Apr. 29, 2020
Forecast [Member] \| Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	3

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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Period Type:	duration