Summary of Significant Accounting Policies (Details) - USD ($)	3 Months Ended	9 Months Ended
Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2021	Apr. 30, 2020
Revenue	$ 20,695	$ 498,676	$ 109,130	$ 2,077,764
Product [Member]
Revenue	20,695	497,386	109,130	2,059,596
Management Services [Member]
Revenue	$ 0	$ 1,290	$ 0	$ 18,168

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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+ Details