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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND RETAINED EARNINGS - USD ($)
 3 Months Ended
Oct. 31, 2016
Oct. 31, 2015
Revenues    
Rental income (Notes 4 and 8) $ 4,480,288 $ 4,277,394
Recovery of real estate taxes 10,952
Revenue to temporarily vacate lease (Note 13) 291,667 291,667
Total revenues 4,782,907 4,569,061
Expenses    
Real estate operating expenses 2,527,935 2,408,599
Administrative and general expenses 1,090,603 1,055,982
Depreciation and amortization (Note 6) 412,627 406,750
Total expenses 4,031,165 3,871,331
Income from operations before investment income, interest expense and income taxes 751,742 697,730
Investment income and interest expense:    
Investment income (Note 3) 3,161 7,222
Interest expense (Notes 5, 7 and 10) (61,878) (64,577)
Total investment income and interest expense (58,717) (57,355)
Income from operations before income taxes 693,025 640,375
Income taxes provided 231,000 239,000
Net income 462,025 401,375
Retained earnings, beginning of period 43,469,706 41,951,946
Retained earnings, end of period $ 43,931,731 $ 42,353,321
Income per common share (Note 2) $ 0.23 $ 0.20
Dividends per share
Average common shares outstanding 2,015,780 2,015,780