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Note 10 - Long-term Debt (Tables)
9 Months Ended
Apr. 30, 2022
Credit Agreement [Member]  
Notes Tables  
Schedule of Long-Term Debt Instruments [Table Text Block]

Balance, July 31, 2021

 $10,075,231 

Amortization of discount and accrued fees

  524,769 

Payment of anniversary fees

  (600,000)

Principal repayment

  (10,000,000)

Balance, April 30, 2022

 $-