CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND RETAINED EARNINGS (USD $)	3 Months Ended
	Oct. 31, 2012	Oct. 31, 2011
Revenues
Rental income (Notes 4 and 8)	$ 4,194,532	$ 3,982,537
Total revenues	4,194,532	3,982,537
Expenses
Real estate operating expenses	2,000,894	2,014,265
Administrative and general expenses	844,069	940,421
Depreciation and amortization (Note 6)	401,257	386,797
Total expenses	3,246,220	3,341,483
Income from operations before investment income, interest expense and income taxes	948,312	641,054
Investment income and interest expense:
Investment income (Note 3)	10,324	2,812
Interest expense (Notes 5, 7 and 10)	(113,862)	(151,689)
Interest Income (Expense), Net	(103,538)	(148,877)
Income from operations before income taxes	844,774	492,177
Income taxes provided	344,000	120,000
Net income	500,774	372,177
Retained earnings, beginning of period	38,340,270	37,069,917
Retained earnings, end of period	$ 38,841,044	$ 37,442,094
Income per common share (Note 2) (in dollars per share)	$ 0.25	$ 0.18
Dividends per share (in dollars per share)	$ 0	$ 0
Average common shares outstanding (in shares)	2,015,780	2,015,780