Significant Accounting Policies (Details 2) (USD $)	12 Months Ended
Jul. 31, 2013	Jul. 31, 2012
Stock options to non-employees
Stock-based compensation expense recognized	$ 34,500
Research and development expense \| Non-employees
Stock options to non-employees
Stock-based compensation expense recognized	11,000	25,000
General and administrative expense \| Non-employees
Stock options to non-employees
Stock-based compensation expense recognized	$ 289,000	$ 133,000

The amount of expense reported during the period resulting from the transaction in which equity securities were issued to pay for goods or nonemployee services.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(1)(i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 50

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6406099&loc=d3e25284-112666

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 65

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration