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Fair Value Measurements (Tables)

6 Months Ended

Jan. 31, 2012

Fair Value Measurements [Abstract]

Summary Of Cash Equivalents Measured At Fair Value

		Fair Value Measurement as of January 31, 2012
Description		Balance at January 31, 2012				Level 1				Level 2				Level 3
Money Market		$	8,386			$	8,386			$	—			$	—
Commercial Paper		$	19,990			$	—			$	19,990			$	—
Certificates of Deposit		$	1,890			$	—			$	1,890			$	—
		Fair Value Measurement as of July 31, 2011
Description		Balance at July 31, 2011				Level 1				Level 2				Level 3
US Treasury		$	8,381			$	8,381			$	—			$	—
Certificates of Deposit		$	2,490			$	—			$	2,490			$	—
		Fair Value Measurement as of January 31, 2011
Description		Balance at January 31, 2011				Level 1				Level 2				Level 3
US Treasury		$	8,297			$	8,297			$	—			$	—
Money Market		$	402			$	402			$	—			$	—
Certificates of Deposit		$	300			$	—			$	300			$	—

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- Definition

Tabular disclosure of the inputs and valuation techniques used to measure fair value, and a discussion of changes in valuation techniques and related inputs, if any, applied during the period to each separate class of assets and liabilities that are measured on a recurring and/or nonrecurring basis.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Section 50

-Paragraph 2

-Subparagraph (e)

-SubTopic 10

-Topic 820

-URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19207-110258



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

-Publisher FASB

-Name Accounting Standards Codification

-Section 50

-Paragraph 5

-Subparagraph (d)

-SubTopic 10

-Topic 820

-URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19296-110258

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- Details

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