Marketable Securities (Schedule of investment income) (Details) (USD $)	3 Months Ended
Oct. 31, 2013	Oct. 31, 2012
Marketable Securities [Abstract]
Gain (loss) on sale of marketable securities	$ 182,841	$ (517)
Interest income	953	2,527
Dividend income	5,630	8,314
Total	$ 189,424	$ 10,324

- Definition

This item represents the net total realized and unrealized gain (loss) included in earnings for the period as a result of selling or holding marketable securities categorized as trading, available-for-sale, or held-to-maturity, including the unrealized holding gain (loss) of held-to-maturity securities transferred to the trading security category and the cumulative unrealized gain (loss) which was included in other comprehensive income (a separate component of shareholders' equity) for available-for-sale securities transferred to trading securities during the period. Additionally, this item would include any losses recognized for other than temporary impairments (OTTI) of the subject investments in debt and equity securities.

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