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Note 6 - Convertible Debt (Details Textual) - USD ($) |  | 3 Months Ended | 9 Months Ended | 73 Months Ended |
--- | --- | --- | --- | --- | ---
Sep. 27, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015 | Dec. 31, 2015 | Jan. 08, 2016
2016 Convertible Notes [Member] | Settlement Agreement [Member] |  |  |  |  |  |
Debt Instrument, Face Amount | $ 1,880,000 |  |  |  |  |
Debt Instrument, Term | 1 year |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 6.00% |  |  |  |  |
Common Stock, Par or Stated Value Per Share | $ 0.001 |  |  |  |  |
Debt Instrument, Convertible, Conversion Price | $ 3.50 |  |  |  |  |
Litigation Settlement, Expense | $ 2,500,000 |  |  |  |  |
2016 Convertible Notes [Member] |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 6.00% |  |  |
Debt Instrument, Convertible, Conversion Price |  |  | $ 3.50 |  |  |
Convertible Notes [Member] | Minimum [Member] |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  | 1.00% |
Convertible Notes [Member] | Maximum [Member] |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  | 1.50% |
Convertible Notes [Member] |  |  |  |  |  |
Proceeds from Issuance of Unsecured Debt |  |  |  |  | $ 22,384,320 |
Qualified Financing, Minimum Amount of Gross Proceeds |  |  | $ 15,000,000 |  |  |
Debt Conversion, Converted Instrument, Shares Issued |  |  | 217,122 |  |  |
Convertible Note Series C [Member] |  |  |  |  |  |
Debt Conversion, Converted Instrument, Amount |  | $ 54,500 | $ 439,538 | $ 1,361 |  |
Diffusion LLC [Member] |  |  |  |  |  |
Convertible Notes Payable |  |  |  |  |  | $ 1,125,000
Common Stock, Par or Stated Value Per Share |  |  | $ 0.001 |  | $ 0.001 |
Litigation Settlement, Expense |  |  | $ 2,500,000 |  |  |
Debt Conversion, Converted Instrument, Amount |  |  | $ 711,495 | $ 47,742 |  |

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- Definition Face amount or stated value per share of common stock. + References Reference 1: 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(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of a written promise to pay a note, initially due after one year or beyond the operating cycle if longer, which can be exchanged for a specified amount of one or more securities (typically common stock), at the option of the issuer or the holder. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-04(13)) -URI http://asc.fasb.org/extlink&oid=6488278&loc=d3e603758-122996 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 4: 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(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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