Income Taxes (Details) - USD ($)	Oct. 31, 2016	Jul. 31, 2016
Income Tax Contingency [Line Items]
Unrecognized tax benefits	$ 9,195,000	$ 9,171,000
Interest accrued relating to income taxes	70,000	63,000
Unrecognized tax benefits that would positively impact our effective tax rate, if recognized	8,247,000	8,261,000
Non-current income taxes payable
Income Tax Contingency [Line Items]
Unrecognized tax benefits	2,928,000	2,992,000
Included in the non-current deferred tax liabilities (as an offset to the associated deferred tax asset)
Income Tax Contingency [Line Items]
Unrecognized tax benefits	$ 6,267,000	$ 6,179,000