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INCOME TAX (Components of Deferred Tax Provision (Benefit)) (Details) - USD ($) | 12 Months Ended
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Jul. 31, 2021 | Jul. 31, 2020
Deferred tax provision (benefit) | $ (159,000) | $ (355,000)
Book depreciation exceeding (less than) tax depreciation [Member] |  |
Deferred tax provision (benefit) | 291,723 | (1,691,703)
Increase in reserve for bad debts [Member] |  |
Deferred tax provision (benefit) | (65,109) | (17,220)
Lease Expense Per Book in Excess of Cash Paid [Member] |  |
Deferred tax provision (benefit) | (360,537) | 2,477,725
Federal Net Operating Loss Carryforward [Member] |  |
Deferred tax provision (benefit) | (406,742) | (924,647)
State net operating loss carryforward [Member] |  |
Deferred tax provision (benefit) | (116,410) | (22,687)
Decrease of rental income received in advance [Member] |  |
Deferred tax provision (benefit) | 27,111 | 39,637
Anticipated PPP Loan Expenses to be Forgiven [Member] |  |
Deferred tax provision (benefit) | 199,390 | (199,390)
Increase (decrease) in unbilled receivables [Member] |  |
Deferred tax provision (benefit) | 156,686 | (47,962)
Other Deferred Income Tax Expense [Member] |  |
Deferred tax provision (benefit) | $ 114,888 | $ 31,247

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