Summary of significant accounting policies (Details) - Allowance for doubtful accounts - USD ($) $ in Thousands |
12 Months Ended | ||
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Jul. 31, 2017 |
Jul. 31, 2016 |
Jul. 31, 2015 |
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| Allowance for doubtful accounts [Abstract] | |||
| Beginning balance | $ 3,517 | $ 1,786 | |
| Provision for doubtful accounts | 2,775 | 2,336 | $ 2,284 |
| Write-offs | (2,716) | (605) | |
| Ending balance | $ 3,576 | $ 3,517 | $ 1,786 |
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- References No definition available.
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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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