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Note 7 - Intangible Assets (Tables)
12 Months Ended
Sep. 30, 2016
Notes Tables  
Schedule of Finite-Lived Intangible Assets [Table Text Block]
 
 
September 30,
 
 
 
2016
 
 
2015
 
Cost
  $ 108,247     $ 96,975  
Accumulated amortization
    (45,342 )     (38,590 )
Intangible assets, net
  $ 62,905     $ 58,385  
 
 
Year ended September 30,
 
 
 
2016
 
 
2015
 
Amortization expense
  $ 6,752     $ 5,927  
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
Estimated Amortization Expense Years Ended September 30,
 
 
 
 
2017
  $ 7,092  
2018
    7,092  
2019
    7,092  
2020
    7,092  
2021
    7,092  
Thereafter
    27,445  
Total estimated amortization expense   $ 62,905