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Note 3 - Summary of Significant Accounting Policies (Tables)
 6 Months Ended
Jun. 30, 2017
Notes Tables  
Foreign Currency Exchange Rates [Table Text Block]
    June 30, 2017   December 31, 2016
                 
Balance sheet items, except for equity accounts    
6.7744
      
6.9370
  
    Six Months Ended June 30,
    2017   2016
                 
Items in the statements of operations and comprehensive loss, and statements of cash flows    
6.8697
      
6.5303
  
    Three Months Ended June 30,
    2017   2016
Items in the statements of operations and comprehensive loss, and statements of cash flows    
6.8536
      
6.5317