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 | 
| X | ||||||||||
- Definition Amount of increase in additional paid in capital (APIC) resulting from a reverse stock split in which per-share par value or stated value is not changed proportionately. No definition available. 
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- Definition The number of fractional shares issued in connection with the Reverse Stock Split. No definition available. 
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- Definition Face amount or stated value per share of common stock. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Details 
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- Details 
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