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Note 2 - Basis of Presentation (Details Textual)	Apr. 30, 2019
Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	500

X

- Definition

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.

+ References

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=27012166&loc=d3e187143-122770

+ Details

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- Details

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Namespace Prefix:
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Balance Type:
Period Type: