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FINANCIAL INSTRUMENTS AND CREDIT RISK CONCENTRATIONS (Schedule of Fair Value of Financial Instruments) (Details) - USD ($) | Jul. 31, 2021 | Jul. 31, 2020
--- | --- | ---
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Marketable securities | $ 3,901,093 | $ 3,744,905
Restricted cash | 882,330 | 1,143,666
Carrying Value [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cash and cash equivalents | 1,552,389 | 3,260,135
Marketable securities | 3,901,093 | 3,744,905
Restricted cash | 882,330 | 1,143,666
Mortgages and note payable | 7,649,632 | 9,519,658
Fair Value [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cash and cash equivalents | 1,552,389 | 3,260,135
Marketable securities | 3,901,093 | 3,744,905
Restricted cash | 882,330 | 1,143,666
Mortgages and note payable | $ 8,088,201 | $ 9,915,121

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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
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