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Note 8 - Goodwill and Intangible Assets (Tables)
3 Months Ended
Dec. 31, 2018
Notes Tables  
Schedule of Finite-Lived Intangible Assets [Table Text Block]
   
December 31,
   
September 30,
 
   
2018
   
2018
 
Technology
  $
639,381
    $
648,208
 
Customer relationships
   
611,582
     
620,026
 
Trade name portfolio
   
222,394
     
225,464
 
Non-compete agreements
   
240,926
     
244,252
 
Patents
   
72,126
     
72,126
 
     
1,786,409
     
1,810,076
 
Accumulated amortization
   
(326,837
)    
(252,730
)
    $
1,459,572
    $
1,557,346
 
   
December 31,
   
December 31,
 
   
2018
   
2017
 
Amortization expense
  $
76,807
    $
1,804
 
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
2019
  $
307,884
 
2020
   
307,633
 
2021
   
230,373
 
2022
   
226,957
 
2023
   
183,869
 
Thereafter
   
202,856
 
Total estimated amortization expense
  $
1,459,572