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Note 2 - Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2014
Accounting Policies [Abstract]  
Allowance for Credit Losses on Financing Receivables [Table Text Block]
   
December 31,
 
   
2014
   
2013
   
2012
 
Balance, beginning of the year
  $ 593,023     $ 337,459     $ 334,473  
  Amounts provided
    -       255,564       138,339  
  Amounts written off
    (446,405 )     -       (135,353 )
Balance, end of the year
  $ 146,618     $ 593,023     $ 337,459