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Debt Securities (Details Narrative) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jan. 31, 2023
Jan. 31, 2022
Jan. 31, 2023
Jan. 31, 2022
Debt Securities, Trading and Available-for-Sale [Abstract]        
Proceeds from sale and maturity of debt securities, available-for-sale $ 16.1 $ 2.2 $ 27.5 $ 6.1