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Note 2 - Summary of Significant Accounting Policies (Details Textual) |  |  | 12 Months Ended
--- | --- | --- | ---
Jan. 21, 2020 | Apr. 30, 2019 | Dec. 31, 2019 shares | Dec. 31, 2018 shares
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount |  |  | 11,157 | 193
Minimum [Member] |  |  |  |
Property, Plant and Equipment, Useful Life |  |  | 3 years |
Maximum [Member] |  |  |  |
Property, Plant and Equipment, Useful Life |  |  | 5 years |
Reverse Stock Split [Member] |  |  |  |
Stockholders' Equity Note, Stock Split, Conversion Ratio |  | 500 |  |
Reverse Stock Split [Member] | Subsequent Event [Member] |  |  |  |
Stockholders' Equity Note, Stock Split, Conversion Ratio | 2,000 |  |  |

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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