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Note 1 - Nature of Business and Reverse Stock Split (Details Textual) | Aug. 10, 2017 USD ($) $ / shares shares | Aug. 09, 2017 shares | Jun. 30, 2017 $ / shares shares | Jun. 30, 2016 $ / shares shares
--- | --- | --- | --- | ---
Common Stock, Par or Stated Value Per Share | $ / shares |  |  | $ 0.001 | $ 0.001
Common Stock, Shares, Outstanding |  |  | 25,085,526 | 20,937,513
Subsequent Event [Member] |  |  |  |
Common Stock, Par or Stated Value Per Share | $ / shares | $ 0.001 |  |  |
Common Stock, Shares, Outstanding | 25,085,526 | 250,842,418 |  |
Reverse Stock Split [Member] | Subsequent Event [Member] |  |  |  |
Stockholders' Equity Note, Stock Split, Conversion Ratio | 10 |  |  |
Fractional Shares Issued, Reverse Stock Split | 0 |  |  |
Adjustments to Additional Paid in Capital, Reverse Stock Split | $ | $ 226,000 |  |  |

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