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Employee Benefit Plan (Details Textuals) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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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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- Details
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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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- 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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Balance Type: | debit
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- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
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