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Note 16 - Commitments and Contingencies (Tables)
6 Months Ended
Jan. 31, 2019
Notes Tables  
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
Fiscal 2019
  $
117,841
 
Fiscal 2020
   
216,462
 
Fiscal 2021
   
178,358
 
Fiscal 2022
   
-
 
Fiscal 2023
   
-
 
    $
512,661