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Note 5 - Goodwill and Intangible Assets (Tables)
6 Months Ended
Mar. 31, 2018
Notes Tables  
Schedule of Finite-Lived Intangible Assets [Table Text Block]
   
March 31, 2018
   
September 31, 2017
 
   
Gross Carrying Amount
   
Accumulated Amortization
   
Net Carrying Amount
   
Gross Carrying Amount
   
Accumulated Amortization
   
Net Carrying Amount
 
Technology
  $
690,000
    $
(20,536
)   $
669,464
    $
-
    $
-
    $
-
 
Customer relationships
   
660,000
     
(19,642
)    
640,358
     
-
     
-
     
-
 
Trade name portfolio
   
240,000
     
(10,000
)    
230,000
     
-
     
-
     
-
 
Non-compete agreements
   
260,000
     
(18,056
)    
241,944
     
-
     
-
     
-
 
Patents
   
108,247
     
(56,166
)    
52,081
     
108,247
     
(52,558
)    
55,689
 
    $
1,958,247
    $
(124,400
)   $
1,833,847
    $
108,247
    $
(52,558
)   $
55,689
 
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
Estimated Future Amortization Expense Years Ended September 30,
 
 
 
 
2018 (April 1, 2018 through September 30, 2018)
  $
166,689
 
2019
   
333,771
 
2020
   
333,448
 
2021
   
271,771
 
2022
   
246,363
 
Thereafter
   
481,805
 
Total estimated amortization expense
  $
1,833,847