Investments in Trading Securities (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2023	Jan. 31, 2022
Investments, Debt and Equity Securities [Abstract]
Increase in fair value	$ 39,120		$ 19,116
Decrease in fair value		$ 454,555		$ 793,929