Marketable Securities (Details) - Schedule of investment income - USD ($)	3 Months Ended		6 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2023	Jan. 31, 2022
Schedule Of Investment Income Abstract
Dividend and interest income	$ 75,010	$ 150,322	$ 83,807	$ 157,089
Gain on sale of marketable securities		48,213		48,213
Total	$ 75,010	$ 198,535	$ 83,807	$ 205,302