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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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Net number of share options (or share units) granted during the period.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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

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Period from grant to expiration date of share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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STOCK-BASED COMPENSATION - Additional Information (Details) $ / shares in Units, $ in Millions	12 Months Ended
	Aug. 01, 2026 USD ($) shares	Aug. 02, 2025 USD ($) vote shares	Aug. 03, 2024 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted during period (in shares)	0	0
Weighted-average grant date fair value of options granted (in dollars per share) \| $ / shares			$ 2.09
Grant date fair value of options vested \| $	$ 4.9	$ 7.3	$ 7.1
Aggregate intrinsic value \| $	0.8	$ 0.4	0.1
Unrecognized compensation expense related to unvested options and RSUs, net of forfeitures \| $	$ 20.8
Unrecognized compensation expense related to unvested options weighted average recognition period (in years)	9 months 29 days
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)		3 years
Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense \| $	$ 46.4	$ 56.7	$ 76.8
2017 Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant (in shares)	4,332,383
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)	56,900,610
2019 Inducement Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant (in shares)	2,001,622
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
Stock Options \| 2011 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock options vesting (as a percent)	25.00%
Award vesting period (in years)	3 years
Options exercisable period (in years)	10 years
Stock Options \| 2017 Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options exercisable period (in years)	10 years
Number of shares authorized for issuance (in shares)	6,623,813
Number of shares available for grant (in shares)	4,332,383	2,630,245
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 (in years)	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 (in years)	30 months
Performance-Based Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted during period (in shares)	0		0
Number of votes per share \| vote		1
Performance-Based Stock Awards \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock options vesting (as a percent)		150.00%
Performance-Based Stock Awards \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock options vesting (as a percent)		0.00%