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Marketable Securities (Schedule of financial assets measured at fair value on recurring basis) (Details) - USD ($)	Oct. 31, 2016	Jul. 31, 2016
Marketable securities -
available-for-sale	$ 2,002,818	$ 2,062,205
Fair Value, Inputs, Level 1 [Member]
Marketable securities -
available-for-sale	2,002,818	2,062,205
Fair Value, Inputs, Level 2 [Member]
Marketable securities -
available-for-sale
Fair Value, Inputs, Level 3 [Member]
Marketable securities -
available-for-sale

X

- Definition

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

+ References

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)
-URI http://asc.fasb.org/extlink&oid=65884222&loc=d3e22054-111558

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27232-111563

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=66010992&loc=d3e26610-111562

+ Details

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Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

+ Details

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- Details

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- Details

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- Details

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