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Note 1 - Organization and Description of Business (Details Textual) | Aug. 17, 2016 | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Jan. 08, 2016 USD ($) shares
--- | --- | --- | --- | ---
Convertible Notes Payable | $ |  | $ 550,000 | $ 2,430,000 |
Reverse Stock Split [Member ] |  |  |  |
Stockholders' Equity Note, Stock Split, Conversion Ratio | 10 |  |  |
Diffusion LLC [Member] |  |  |  |
Business Combination, Number of Shares Called by Each Previously Held Unit of Membership Interest | shares |  |  |  | 0.3652658
Convertible Notes Payable | $ |  |  |  | $ 1,100,000
Business Combination, Number of Shares Called by Share Options Assumed | shares |  |  |  | 1,495,615
Diffusion LLC [Member] | Former Equity Holders of Diffusion LLC [Member] |  |  |  |
Percentage of Common Stock Outstanding Owned |  |  |  | 84.10%

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