Accounting Policies [Line Items]

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Debt Instrument, Convertible, Conversion Of Outstanding Stock, Percent

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Debt Instrument, Covenant Terms, Fixed Operating Expenditures, Maximum

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Debt Instrument, Covenant Terms, Inventory Capital Expenditures, Maximum

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Debt Instrument, Covenant Terms, Marketing Expenditures, Maximum

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Debt Instrument, Covenant Terms, Minimum Liquidity Maintenance

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Debt Instrument, Covenant Terms, Relief Period

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Debt Instrument, Covenant Terms, Specified Exclusions

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- Definition

Amount of cash and cash equivalent. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt classified as noncurrent. Excludes lease obligation.

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Amount of cash inflow (outflow) from investing activity, including, but not limited to, discontinued operation. Investing activity includes, but is not limited to, making and collecting loan, acquiring and disposing of debt and equity instruments, property, plant, and equipment, and other productive assets.

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Amount of cash inflow (outflow) from operating activity, including, but not limited to, discontinued operation. Operating activity includes, but is not limited to, transaction, adjustment, and change in value not defined as investing or financing activity.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Liquidity (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended		12 Months Ended
Liquidity (Details) - USD ($) $ in Millions	Aug. 20, 2025	Jul. 31, 2025	Jul. 31, 2024	Jul. 31, 2025	Jul. 31, 2024	Jan. 31, 2025	Aug. 19, 2025	Dec. 31, 2023	Nov. 30, 2023
Accounting Policies [Line Items]
Net loss attributable to common stockholders		$ (26.4)	$ (15.6)	$ (52.5)	$ (37.6)
Accumulated deficit		(1,175.5)		(1,175.5)		$ (1,123.0)
Net cash (used in) provided by operating activities				(2.2)	6.8
Net cash (used in) provided by investing activities				(30.7)	(12.7)
Cash and cash equivalents		43.6	$ 76.6	43.6	$ 76.6	77.4
Long-term debt, net		$ 343.9		343.9		333.7
Term Loan \| Subsequent Event \| 2025 Amended Facility
Accounting Policies [Line Items]
Liquidity maintenance covenant	$ 15.0
Relief period	30 days
2023 Amended Temasek Facility
Accounting Policies [Line Items]
Liquidity maintenance covenant						30.0		$ 30.0	$ 50.0
Maximum inventory capital expenditures, debt covenant				51.0		51.0
Maximum fixed operating expenditures, debt covenant				100.0		100.0
Debt instrument, covenant terms, specified exclusions				10.0		10.0
Maximum marketing expenditures, debt covenant				$ 30.0		30.0
2023 Amended Temasek Facility \| Subsequent Event
Accounting Policies [Line Items]
Liquidity maintenance covenant	$ 15.0
New Credit Agreement
Accounting Policies [Line Items]
Liquidity maintenance covenant						$ 30.0
New Credit Agreement \| Subsequent Event
Accounting Policies [Line Items]
Liquidity maintenance covenant	15.0						$ 30.0
New Credit Agreement \| Term Loan \| Subsequent Event
Accounting Policies [Line Items]
Long-term debt	$ 120.0
New Credit Agreement \| Term Loan \| Subsequent Event \| Base Rate
Accounting Policies [Line Items]
Amended interest rate	4.00%
New Credit Agreement \| Term Loan \| Subsequent Event \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Accounting Policies [Line Items]
Amended interest rate	5.00%
New Credit Agreement \| Term Loan \| Subsequent Event \| Secured Debt
Accounting Policies [Line Items]
Long-term debt	$ 100.0
New Credit Agreement \| Term Loan \| Subsequent Event \| New Money Term Loans
Accounting Policies [Line Items]
Long-term debt	20.0
2025 Amended Facility \| Term Loan \| Subsequent Event
Accounting Policies [Line Items]
Long-term debt	$ 100.0
Amount of shares of stock outstanding (as a percent)	86.00%