Share-Based Compensation Arrangement By Share-Based Payment Award, Additional Shares Reserved, Percentage

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Share Based Compensation Expense, Performance Based Awards recognized in period

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Stockholders equity and stock based compensation.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Face amount or stated value per share of common stock.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Percentage of vesting of award under share-based payment arrangement.

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Amount of stock repurchase plan authorized.

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Amount remaining of a stock repurchase plan authorized.

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Total cost of shares repurchased divided by the total number of shares repurchased.

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Number of shares that have been repurchased during the period and are being held in treasury.

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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the par value method.

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Stock-Based Compensation Expense and Shareholders' Equity (Details Textual) - USD ($)	3 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Jul. 31, 2020
Stockholders Equity and Stock Based Compensation (Additional Textual) [Abstract]
Common stock, shares authorized (in shares)	500,000,000		500,000,000
Common stock, par value (in dollars per share)	$ 0.0001		$ 0.0001
Shares issued (in shares)	83,791,856		83,461,925
Shares outstanding (in shares)	83,791,856		83,461,925
Additional percentage of shares reserved	5.00%
Authorized repurchase amount	$ 200,000,000.0
Shares repurchased (in shares)	48,997
Average price per share (in dollars per share)	$ 102.05
Aggregate purchase price	$ 5,000,000.0
Remaining authorized amount	$ 195,000,000.0
PSUs
Class of Stock [Line Items]
Period of time based Vesting	3 years
PSUs \| Tranche One
Class of Stock [Line Items]
Award vesting percentage	50.00%
PSUs \| Tranche two
Class of Stock [Line Items]
Award vesting percentage	50.00%
TSR PSUs
Class of Stock [Line Items]
Period of time based Vesting	3 years
Restricted Stock Units (RSUs)
Class of Stock [Line Items]
Period of time based Vesting	4 years
Share-based compensation expense	$ 3,300,000	$ 3,400,000