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Summary of Significant Accounting Policies (Details 1) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Jul. 31, 2011 | Jul. 31, 2010 | Jul. 31, 2009
Concentration Risk [Line Items] |  |  |
Advertising expenses | $ 8.8 | $ 12.7 | $ 2.6
Number of customer accounted, not exceeds ten percent of revenues (in numbers) | 0 | 0 | 0
Number of customer accounted, not exceeds ten percent of Company's accounts receivables (in numbers) | 0 | 0 |
Accounts Receivable |  |  |
Concentration Risk [Line Items] |  |  |
State Farm Insurance, Percentage (in percent) |  |  | 11.00%

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- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 93-7 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 35 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848 + Details
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