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Note 8 - Goodwill and Intangible Assets (Tables)
12 Months Ended
Sep. 30, 2018
Notes Tables  
Schedule of Finite-Lived Intangible Assets [Table Text Block]
   
September 30,
 
   
2018
   
2017
 
Technology
  $
648,208
    $
-
 
Customer relationships
   
620,026
     
-
 
Trade name portfolio
   
225,464
     
-
 
Non-compete agreements
   
244,252
     
-
 
Patents
   
72,126
     
108,247
 
     
1,810,076
     
108,247
 
Accumulated amortization
   
(252,730
)    
(52,558
)
    $
1,557,346
    $
55,689
 
   
Year Ended September 30,
 
   
2018
   
2017
 
Amortization expense
  $
231,901
    $
7,216
 
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
Estimated Amortization Expense for the Years ended September 30,
 
2019
  $
312,493
 
2020
   
312,493
 
2021
   
254,819
 
2022
   
231,075
 
2023
   
200,400
 
Thereafter
   
246,066
 
Total estimated amortization expense
  $
1,557,346