|
Summary of significant accounting policies (Details) - Allowance for doubtful accounts (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
|
Jul. 31, 2014
|
Jul. 31, 2013
|
Jul. 31, 2012
|
|
| Allowance for doubtful accounts [Abstract] | |||
| Beginning balance | $ 2,707 | $ 3,273 | |
| Provision for doubtful accounts | 3,063 | 4,496 | 5,104 |
| Write-offs | (3,628) | (5,062) | |
| Ending balance | $ 2,142 | $ 2,707 | $ 3,273 |
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- 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
|
| X | ||||||||||
|
- Definition
Amount of direct write-downs of accounts receivable charged against the allowance. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- 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
|