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Debt Securities (Details Narrative) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Apr. 30, 2023
Apr. 30, 2022
Apr. 30, 2023
Apr. 30, 2022
Debt Securities, Trading and Available-for-Sale [Abstract]        
Proceeds from sale and maturity of debt securities, available-for-sale $ 6.8 $ 1.7 $ 34.3 $ 7.8