Income Taxes (Details) - USD ($)	Jan. 31, 2021	Jul. 31, 2020
Income Tax Contingency [Line Items]
Unrecognized tax benefits, including interest	$ 8,727,000	$ 8,345,000
Interest accrued relating to income taxes	125,000	75,000
Unrecognized tax benefits that would positively impact our effective tax rate, if recognized	8,009,000	7,700,000
Non-current income taxes payable
Income Tax Contingency [Line Items]
Unrecognized tax benefits, including interest	2,286,000	1,963,000
Non-current deferred tax assets
Income Tax Contingency [Line Items]
Unrecognized tax benefits, including interest	$ 6,441,000	$ 6,382,000