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Significant Accounting Policies (Details 3) (USD $)
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3 Months Ended | 57 Months Ended | 3 Months Ended | |
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Oct. 31, 2011
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Oct. 31, 2012
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Oct. 31, 2012
Research and development expense
Non-employees
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Oct. 31, 2012
General and administrative expense
Non-employees
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| Stock options to non-employees | ||||
| Stock-based compensation expense recognized | $ 83,000 | $ 332,000 | $ 6,000 | $ 135,000 |
| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
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
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