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Employee Benefit Plan (Details Textuals) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2011
United States Defined Contribution Plan
Defined Contribution Plans [Line Items]
Recognized deferred compensation expenses	$ 0.5	$ 0.5	$ 0.4
Defined contribution plan, contributions by employer, percentage	20.00%
Maximum employer contribution on employees salary deferral	15.00%
United Kingdom Based Defined Contribution Plans
Defined Contribution Plans [Line Items]
Recognized deferred compensation expenses	$ 0.2	$ 0.2	$ 0.2
Defined contribution plan, contributions by employer, percentage	5.00%

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- Definition

The Percantage of the Maximum Employer Contribution on employees salary deferral for defined contribution plans.

+ References

No definition available.

+ Details

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X

- Definition

The amount of the cost recognized during the period for defined contribution plans.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 70

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942

+ Details

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- Definition

Percentage employer matches of the employee's percentage contribution matched.

+ References

No definition available.

+ Details

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