Income Taxes (Details) - USD ($) |
6 Months Ended | |
|---|---|---|
Jan. 31, 2016 |
Jul. 31, 2015 |
|
| Income Tax Contingency [Line Items] | ||
| Unrecognized tax benefits | $ 3,055,000 | $ 2,796,000 |
| Interest accrued relating to income taxes | 84,000 | 68,000 |
| Unrecognized tax benefits that would positively impact our effective tax rate, if recognized | $ 2,339,000 | 2,138,000 |
| Effective income tax rate, continuing operations, excluding discrete adjustments | 33.50% | |
| An offset to the non-current deferred tax assets | ||
| Income Tax Contingency [Line Items] | ||
| Unrecognized tax benefits | $ 1,586,000 | 1,223,000 |
| Noncurrent Income Taxes Payable | ||
| Income Tax Contingency [Line Items] | ||
| Unrecognized tax benefits | $ 1,469,000 | $ 1,573,000 |