Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended
Oct. 31, 2020	Oct. 31, 2019
Income Tax Disclosure [Abstract]
Benefit from income taxes	$ (10,677)	$ (6,650)
Effective income tax rate, continuing operations	35.00%
Percentage of Statutory federal income tax rate	21.00%
Unrecognized tax benefits	$ 300
Unrecognized tax benefits that would impact tax rate	$ 18,200

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of increase (decrease) in unrecognized tax benefits attributable to uncertain tax positions taken in tax returns.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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