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Employee benefit plan (Details) - Schedule of Contributions Plan (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | ||
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Jul. 31, 2012
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Jul. 31, 2011
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Jul. 31, 2010
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| Schedule of Contributions Plan [Abstract] | |||
| Contributions | $ 521,000 | $ 483,000 | $ 480,000 |
| X | ||||||||||
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- Details
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- Definition
Amount of discretionary contributions made by an employer to a defined contribution plan. No definition available.
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