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Employee Benefit Plans - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Jul. 31, 2013 | Jul. 31, 2012 | Jul. 31, 2011
Schedule of Employee Benefit Plans [Line Items] |  |  |
Employer match and administrative fees for 401(k) plan | $ 316 | $ 174 | $ 209
Investments under the plan | 7,000 | 8,970 |
Discontinued Operations |  |  |
Schedule of Employee Benefit Plans [Line Items] |  |  |
Other investments securities | $ 3,407 |  |

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- Definition Fair value of nonqualified deferred compensation plan. + References No definition available. + Details
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- 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 11 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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