Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 210
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Marketable Securities (Details) - Schedule of financial assets measured at fair value on recurring basis - USD ($)	Apr. 30, 2022	Jul. 31, 2021
Assets:
Marketable securities	$ 3,374,954	$ 3,901,093
Level 1 [Member]
Assets:
Marketable securities	3,374,954	3,901,093
Level 2 [Member]
Assets:
Marketable securities
Level 3 [Member]
Assets:
Marketable securities