Marketable Securities (Schedule of financial assets measured at fair value) (Details) (USD $)	Apr. 30, 2014	Jul. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Marketable securities - available-for-sale	$ 1,334,193	$ 2,409,273
Quoted prices in active markets for identical assets/liabilities (Level 1) [Member]
Schedule of Available-for-sale Securities [Line Items]
Marketable securities - available-for-sale	1,334,193	2,409,273
Significant other observable inputs (Level 2) [Member]
Schedule of Available-for-sale Securities [Line Items]
Marketable securities - available-for-sale
Significant unobservable inputs (Level 3) [Member]
Schedule of Available-for-sale Securities [Line Items]
Marketable securities - available-for-sale
Mutual Funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Marketable securities - available-for-sale	810,329	1,789,914
Mutual Funds [Member] | Quoted prices in active markets for identical assets/liabilities (Level 1) [Member]
Schedule of Available-for-sale Securities [Line Items]
Marketable securities - available-for-sale	810,329	1,789,914
Mutual Funds [Member] | Significant other observable inputs (Level 2) [Member]
Schedule of Available-for-sale Securities [Line Items]
Marketable securities - available-for-sale
Mutual Funds [Member] | Significant unobservable inputs (Level 3) [Member]
Schedule of Available-for-sale Securities [Line Items]
Marketable securities - available-for-sale
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Marketable securities - available-for-sale	523,864	619,359
Equity Securities [Member] | Quoted prices in active markets for identical assets/liabilities (Level 1) [Member]
Schedule of Available-for-sale Securities [Line Items]
Marketable securities - available-for-sale	523,864	619,359
Equity Securities [Member] | Significant other observable inputs (Level 2) [Member]
Schedule of Available-for-sale Securities [Line Items]
Marketable securities - available-for-sale
Equity Securities [Member] | Significant unobservable inputs (Level 3) [Member]
Schedule of Available-for-sale Securities [Line Items]
Marketable securities - available-for-sale