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6. Intangibles (Tables)
12 Months Ended
Sep. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]  
Future amortization expense related to intangible assets
2019  $1,287,603 
2020   1,107,465 
2021   1,052,377 
2022   841,974 
2023   514,407 
Thereafter   1,862,021 
   $6,665,847