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Note 7 - Bank Debt (Tables)
 3 Months Ended
Dec. 31, 2017
Notes Tables  
Schedule of Debt [Table Text Block]
   
December 31, 2017
    
September 30, 2017
    
September 30, 2016
  
                         
Term Debt
   $
1,750,000
     $
1,875,000
     $
-
  
Revolving Debt
    
3,524,235
      
5,044,486
      
-
  
Total Bank Debt
    
5,274,235
      
6,919,486
      
-
  
Less: Current Portion
    
500,000
      
500,000
      
-
  
Non-Current Bank Debt
    
4,774,235
      
6,419,486
      
-
  
Less: Unamortized Debt Costs
    
41,685
      
44,663
      
-
  
Net Non-Current Bank Debt
   $
4,732,550
     $
6,374,823
     $
-