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Note 8 - Commitments and Contingencies (Tables)
 6 Months Ended
Jun. 30, 2017
Notes Tables  
Contractual Obligation, Fiscal Year Maturity Schedule [Table Text Block]
Payment Due By Year
 
 
 
2017
 
 
2018
 
 
2019
 
 
2020
 
 
2021
 
 
2022
 
 
Total
 
Contractual Obligations
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Rent Obligations
   $
54,000
     $
108,000
     $
108,000
     $
108,000
     $
108,000
     $
27,000
     $
405,000
  
                                                         
Total
   $
54,000
     $
108,000
     $
108,000
     $
108,000
     $
108,000
     $
27,000
     $
405,000