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CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($)
 6 Months Ended
Jan. 31, 2022
Jan. 31, 2021
Cash Flows From Operating Activities:    
Net loss $ (586,580) $ (469,531)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:    
Bad debt expense (recoveries) 219,350 74,000
Provision (Benefit) for deferred income taxes (221,000) (197,000)
Depreciation 903,682 889,443
Amortization of deferred charges 285,210 193,200
Operating lease expense in excess of cash payments 610,136 675,808
Deferred finance costs included in interest expense 19,056 19,056
Net realized gain on marketable securities (48,213) (83,176)
Net unrealized (gain) loss on marketable securities 236,738 (24,015)
Deferred Charges (1,138,562)
Changes in Operating Assets and Liabilities:    
Receivables (430,879) (525,834)
Prepaid expenses and other assets 203,162 142,109
Accounts payable and accrued expenses (369,905) 519,486
Security deposits payable (23,107) 60,000
Cash provided by operating activities 797,650 134,984
Cash Flows From Investing Activities:    
Acquisition of property and equipment (871,988) (1,494,147)
Marketable securities:    
Receipts from sales 400,254 494,990
Payments for purchases (127,414) (566,971)
Cash (used) in investing activities (599,148) (1,566,128)
Cash Flows From Financing Activities:    
Payments - mortgage and other debt payments (592,124) (566,567)
Net cash (used) in financing activities (592,124) (566,567)
Decrease in cash, cash equivalents and restricted cash (393,622) (1,997,711)
Cash, cash equivalents and restricted cash at beginning of period 2,434,719 4,403,801
Cash, cash equivalents and restricted cash at end of period $ 2,041,097 $ 2,406,090