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Number of shares authorized for issuance under share-based payment arrangement.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Stock-Based Compensation - Additional Information (Details) $ in Millions	3 Months Ended		9 Months Ended
	May 03, 2025 USD ($) shares	Apr. 27, 2024 USD ($)	May 03, 2025 USD ($) vote shares	Apr. 27, 2024 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense related to unvested options and RSUs, net of forfeitures \| $	$ 44.2		$ 44.2
Unrecognized compensation expense related to unvested options weighted average recognition period			1 year 3 months 10 days
Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense \| $	$ 13.7	$ 18.9	$ 43.7	$ 59.9
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			1 year
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			3 years
2017 Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant (in shares)	2,586,148		2,586,148
2017 Incentive Plan \| Class A Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for issuance (in shares)	50,276,797		50,276,797
2019 Inducement Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant (in shares)	1,846,434		1,846,434
2019 Inducement Plan \| Class A Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for issuance (in shares)	10,750,000		10,750,000
Stock Options \| 2011 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock options vesting percentage			25.00%
Award vesting period			3 years
Options exercisable period			10 years
Stock Options \| 2017 Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options exercisable period			10 years
Stock Options \| 2017 Incentive Plan \| Share-Based Payment Arrangement, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			6 months
Stock Options \| 2017 Incentive Plan \| Share-Based Payment Arrangement, Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			30 months
Performance-Based Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of votes per share \| vote			1
Performance-Based Stock Awards \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock options vesting percentage			0.00%
Performance-Based Stock Awards \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock options vesting percentage			150.00%