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Note 9 - Commitments and Contingencies (Tables)
6 Months Ended
Jun. 30, 2016
Notes Tables  
Schedule of Maturities of Contractual Obligations [Table Text Block]
 
 
Rental Commitments
 
Payments due by period:
       
One year
  $ 73,600  
Two years
    49,600  
Three years
     
Thereafter
     
Total
  $ 123,200