SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Schedule of financial assets measured at fair value on recurring basis) (Details) (USD $)	Jul. 31, 2013	Jul. 31, 2012
Marketable securities -
available-for-sale	$ 2,409,273	$ 2,215,209
Held-to-maturity		178,176
Fair value measurement	2,409,273	2,393,385
Level 1 [Member]
Marketable securities -
available-for-sale	2,409,273	2,215,209
Held-to-maturity		178,176
Fair value measurement	2,409,273	2,393,385
Level 2 [Member]
Marketable securities -
available-for-sale
Held-to-maturity
Fair value measurement
Level 3 [Member]
Marketable securities -
available-for-sale
Held-to-maturity
Fair value measurement

Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Available-for-Sale Securities

-URI http://asc.fasb.org/extlink&oid=6505594

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Trading Securities

-URI http://asc.fasb.org/extlink&oid=6526789

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 25

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Subparagraph a, f, g

-Article 7

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 35

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=27723805&loc=d3e24584-111560

Name:	us-gaap_InvestmentsFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant