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Stockholder's Equity (Details 2) (Stock Options, USD $) In Thousands, except Per Share data, unless otherwise specified | 12 Months Ended
--- | ---
Jul. 31, 2013 | Jul. 31, 2012 | Jul. 31, 2011
Stock Options |  |  |
Number Of Shares [Roll Forward] |  |  |
Non-vested shares at July 31, 2012 | 6,013 |  |
Grants of non-vested shares | 335 |  |
Vested | (2,889) |  |
Forfeitures or expirations (in shares) | (63) |  |
Non-vested shares at July 31, 2013 | 3,396 | 6,013 |
Weighted Average Grant Date Fair Value [Roll Forward] |  |  |
Non-vested shares at July 31, 2012 | $ 6.59 |  |
Grants of non-vested shares | $ 7.87 | $ 6.01 | $ 6.59
Vested | $ 6.57 |  |
Forfeitures or expirations | $ 6.06 |  |
Non-vested shares at July 31, 2013 | $ 6.55 | $ 6.59 |

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- Definition Represents the weighted average grant date fair value of options vested. + References No definition available. + Details
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- Definition For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3)-(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of non-vested options outstanding. + References No definition available. + Details
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- Definition Weighted average grant-date fair value of non-vested options forfeited. + References No definition available. + Details
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