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Summary of significant accounting policies (Details) - Allowance for doubtful accounts (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | ||
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Jul. 31, 2013
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Jul. 31, 2012
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Jul. 31, 2011
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| Allowance for doubtful accounts [Abstract] | |||
| Beginning balance | $ 3,273 | $ 3,488 | |
| Provision for doubtful accounts | 4,496 | 5,104 | 4,431 |
| Write-offs | (5,062) | (5,319) | |
| Ending balance | $ 2,707 | $ 3,273 | $ 3,488 |
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- Details
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- Definition
For an unclassified balance sheet, a valuation allowance for receivables due a company that are expected to be uncollectible. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of direct write-downs of accounts receivable charged against the allowance. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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