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Employee Benefit Plan (Details Textuals) - USD ($) $ in Millions	12 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2013
U.S. 401(k) Plan
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plan, contributions by employer, percentage	20.00%
Maximum employer contribution on employees salary deferral	15.00%
Recognized deferred compensation expenses	$ 0.8	$ 0.8	$ 0.5
U.K. Defined Contribution Plan
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plan, contributions by employer, percentage	5.00%
Recognized deferred compensation expenses	$ 0.7	$ 0.6	$ 0.2

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

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- Definition

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+ References

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- Definition

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

+ References

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- Definition

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+ References

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