MARKETABLE SECURITIES (Schedule of classified marketable securities) (Details) (USD $)	12 Months Ended
Jul. 31, 2013	Jul. 31, 2012
Held-to-maturity		$ 178,176
Available-for-sale - Fair Value	2,409,273	2,215,209
Current [Member]
Held-to-maturity - Cost	50,326	226,397
Held-to-maturity - Gross Unrealized Gains		2,025
Held-to-maturity - Gross Unrealized Losses
Held-to-maturity	50,326	228,422
Noncurrent [Member]
Available-for-sale - Cost	2,075,640	1,971,732
Available-for-sale - Gross Unrealized Gains	347,382	259,016
Available-for-sale - Gross Unrealized Losses	13,749	15,539
Available-for-sale - Fair Value	2,409,273	2,215,209
Mutual Funds [Member] \| Noncurrent [Member]
Available-for-sale - Cost	1,559,925	1,255,982
Available-for-sale - Gross Unrealized Gains	242,041	123,203
Available-for-sale - Gross Unrealized Losses	12,052
Available-for-sale - Fair Value	1,789,914	1,379,185
Equity Securities [Member] \| Noncurrent [Member]
Available-for-sale - Cost	515,715	715,750
Available-for-sale - Gross Unrealized Gains	105,341	135,813
Available-for-sale - Gross Unrealized Losses	1,697	15,539
Available-for-sale - Fair Value	619,359	836,024
Certificates Of Deposit [Member] \| Current [Member]
Held-to-maturity - Cost	50,326	50,246
Held-to-maturity - Gross Unrealized Gains
Held-to-maturity - Gross Unrealized Losses
Held-to-maturity	50,326	50,246
Corporate Debt Securities [Member] \| Current [Member]
Held-to-maturity - Cost		176,151
Held-to-maturity - Gross Unrealized Gains		2,025
Held-to-maturity - Gross Unrealized Losses
Held-to-maturity		$ 178,176

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 25

-Paragraph 1

-Subparagraph (b)

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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-Section 50

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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- Definition

This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

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-Subparagraph (SX 210.5-02.2)

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Amount of unrealized gain before deducting unrealized loss on investments in debt and equity securities classified as available-for-sale securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 2

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Amount of unrealized loss before deducting unrealized gain on investments in available-for-sale securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

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Amount before other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity.

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No definition available.

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Fair value of investments in debt securities classified as held-to-maturity.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

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Amount of unrecognized gain before loss on investments in held-to-maturity securities.

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Amount of unrecognized loss before gain on investments in held-to-maturity securities. Excludes write-down for other than temporary impairment (OTTI).

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