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Note 9 - Common Stock (Details) - Outstanding Stock Purchase Warrants | Dec. 31, 2013 | May 14, 2013 | Apr. 30, 2013 | Jan. 17, 2013 | Dec. 31, 2012
--- | --- | --- | --- | --- | ---
Class of Warrant or Right [Line Items] |  |  |  |  |
Number of Shares, Warrants | 8,292,226 |  |  |  |
Weighted Average Exercise Price, Warrants | 2.07 | 0.50 | 0.60 | 0.60 | 0.75
Warrants Expiration 1 [Member] |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |
Number of Shares, Warrants | 7,400 |  |  |  |
Weighted Average Exercise Price, Warrants | 1.40 |  |  |  |
Warrants Expiration 2 [Member] |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |
Number of Shares, Warrants | 818,376 |  |  |  |
Weighted Average Exercise Price, Warrants | 16.50 |  |  |  |
Warrants Expiration 3 [Member] |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |
Number of Shares, Warrants | 987,783 |  |  |  |
Weighted Average Exercise Price, Warrants | 1.00 |  |  |  |
Warrants Expiration 4 [Member] |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |
Number of Shares, Warrants | 45,000 |  |  |  |
Weighted Average Exercise Price, Warrants | 1.00 |  |  |  |
Warrants Expiration 5 [Member] |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |
Number of Shares, Warrants | 567,001 |  |  |  |
Weighted Average Exercise Price, Warrants | 1.00 |  |  |  |
Warrants Expiration 6 [Member] |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |
Number of Shares, Warrants | 5,866,666 |  |  |  |
Weighted Average Exercise Price, Warrants | 0.35 |  |  |  |

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- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(4)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph i -Subparagraph 4 -Article 4 + Details
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- Details
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- Definition Number of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph i -Article 4 + Details
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