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Stockholders equity and stock based compensation.

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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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Amount of stock repurchase plan authorized.

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Stock-Based Compensation Expense and Shareholders' Equity (Details Textual) - USD ($)	3 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Jul. 31, 2021	Dec. 15, 2020	Oct. 20, 2020
Class of Stock [Line Items]
Share-based compensation expense	$ 4,000,000	$ 3,300,000
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)	83,305,156		83,194,157
Shares outstanding (in shares)	83,305,156		83,194,157
Total common stock reserved for issuance (in shares)	7,098,528		7,434,315
Authorized repurchase amount					$ 200,000,000
Shares repurchased (in shares)	226,172
Average price per share (in dollars per share)	$ 116.12
Aggregate purchase price	$ 26,300,000
Remaining authorized amount	$ 11,200,000
Equity Incentive Plan
Stockholders Equity and Stock Based Compensation (Additional Textual) [Abstract]
Total common stock reserved for issuance (in shares)				5,000,000
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