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Note 8 - Common Stock - Outstanding Stock Purchase Warrants (Details) | Dec. 31, 2014 $ / shares shares
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Warrants Expiration 1[Member] |
Number of Shares (in shares) | shares | 1,806,159
Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 1
Warrants Expiration 2 [Member] |
Number of Shares (in shares) | shares | 45,000
Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 1
Warrants Expiration 3 [Member] |
Number of Shares (in shares) | shares | 567,001
Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 1
Warrants Expiration 4 [Member] |
Number of Shares (in shares) | shares | 2,690,666
Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 0.35
Number of Shares (in shares) | shares | 5,108,826
Weighted Average Exercise Price (in dollars per share) | $ / shares | $ 0.66

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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 + Details
Name: | us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

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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 + Details
Name: | us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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- Details
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