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Note 11 - Subsequent Events (Details Textual) - USD ($) |  | 1 Months Ended
--- | --- | ---
May 11, 2017 | Apr. 30, 2017 | Mar. 31, 2017 | Mar. 23, 2017
Stock Issued During Period, Shares, Warrants Exercised |  |  | 983,334 |
Proceeds from Warrant Exercises |  |  | $ 49,167 |
Subsequent Event [Member] |  |  |  |
Stock Issued During Period, Shares, Warrants Exercised |  | 2,500,000 |  | 983,334
Proceeds from Warrant Exercises |  | $ 100,000 |  | $ 49,167
Subsequent Event [Member] | Series D Convertible Preferred Stock [Member] |  |  |  |
Stock Issued During Period, Shares, New Issues | 1,000 |  |  |
Stock Issued During Period, Value, New Issues | $ 1,000,000 |  |  |
Convertible Preferred Stock, Shares Issued upon Conversion | 66,666.67 |  |  |
Convertible Preferred Stock, Total Shares Issued upon Conversion | 66,666,667 |  |  |

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- Definition Number of shares issued for each share of convertible preferred stock that is converted. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21475-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(27)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21506-112644 + Details
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