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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
 6 Months Ended
Jan. 31, 2025
Jan. 31, 2024
Cash Flows From Operating Activities:    
Net loss $ (131,024) $ (290,603)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:    
Bad debt expense (recoveries) 10,518 (32,573)
Provision (benefit) for deferred income taxes (40,000) (51,000)
Depreciation 889,340 857,522
Loss on asset disposal 12,478
Amortization of deferred charges 252,666 259,715
Deferred costs (136,109) (712,849)
Operating lease expense in excess of cash payments 416,780 425,475
Deferred finance costs included in interest expense 15,114 19,056
Net realized gain on marketable securities (149,260)
Net unrealized loss on marketable securities 107,651
Changes in Operating Assets and Liabilities:    
Receivables (354,437) (65,402)
Prepaid expenses and other assets 316,353 280,357
Accounts payable and accrued expenses 213,195 179,907
Security deposits payable (33,187) 47,976
Cash provided by operating activities 1,419,209 888,450
Cash Flows From Investing Activities:    
Acquisition of property and equipment (662,849) (888,986)
Marketable securities:    
Receipts from sales 300,000
Payments for purchases (123,037)
Cash (used) in investing activities (662,849) (712,023)
Cash Flows From Financing Activities:    
Payments - mortgages (575,339) (646,722)
Cash (used) in financing activities (575,339) (646,722)
Increase (decrease) in cash, cash equivalents and restricted cash 181,021 (470,295)
Cash, cash equivalents and restricted cash at beginning of period 2,285,601 2,217,735
Cash, cash equivalents and restricted cash at end of period $ 2,466,622 $ 1,747,440