Income Taxes (Details) - USD ($)	Apr. 30, 2020	Jul. 31, 2019
Income Tax Contingency [Line Items]
Unrecognized tax benefits	$ 8,309,000	$ 7,215,000
Interest accrued relating to income taxes	73,000	12,000
Unrecognized tax benefits that would positively impact our effective tax rate, if recognized	7,663,000	6,670,000
Non-current income taxes payable
Income Tax Contingency [Line Items]
Unrecognized tax benefits	2,316,000	325,000
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	$ 5,993,000	$ 6,890,000