Investments in Trading Securities (Details) - USD ($)	3 Months Ended		9 Months Ended
	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2023	Apr. 30, 2022
Investments in Trading Securities [Abstract]
Increase in fair value	$ 82,265		$ 101,381
Decrease in fair value		$ 370,467		$ 423,462