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Number of directors elected.

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Share-based Compensation Arrangement by Share-based Payment Award, Performance Objective Measurement Period

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under 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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Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

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Amount of cost to be recognized for option under share-based payment arrangement.

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Description of service or performance condition required to be met for earning right to award under share-based payment arrangement. Includes, but is not limited to, combination of market, performance or service condition.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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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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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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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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Price of a single share of a number of saleable stocks of a company.

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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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Number of share options (or share units) exercised during the current period.

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Accounting for Stock-Based Compensation - Additional Information (Details)				3 Months Ended				9 Months Ended		12 Months Ended
	Mar. 01, 2025 USD ($) Director shares	Jun. 01, 2024 USD ($) shares	Mar. 01, 2024 USD ($) shares	Sep. 30, 2025 USD ($) $ / shares shares	Jun. 30, 2025 shares	Mar. 31, 2025 shares	Sep. 30, 2024 shares	Sep. 30, 2025 USD ($) Item $ / shares shares	Sep. 30, 2024 Item $ / shares shares	Dec. 31, 2024 Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reversal of stock-based compensation expense \| $				$ 4,000,000
Employee service share-based compensation, unrecognized compensation costs on nonvested awards \| $				$ 14,000,000				$ 14,000,000
Employee service share-based compensation total compensation cost not yet recognized, period for recognition								22 months
Employee service share-based compensation, nonvested awards, modifications to awards \| Item								0	0
Share exercised \| shares				0			0	0	0
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee service share-based compensation total compensation cost not yet recognized, period for recognition								21 months
Employee service share-based compensation, unrecognized compensation costs on nonvested stock options \| $				$ 2,000,000				$ 2,000,000
Weighted-average grant date fair value of stock options \| $ / shares								$ 2.27	$ 2.19
Share Price \| $ / shares				$ 3.21				$ 3.21
Restricted Stock and RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee service share-based compensation total compensation cost not yet recognized, period for recognition								22 months
Employee service share-based compensation, unrecognized compensation costs on nonvested awards other than options \| $				$ 12,000,000				$ 12,000,000
Restricted Stock, Performance-Based Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by payment award, performance objective measurement period								3 years
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, number of grants \| shares						777,413
Number of directors elected to defer the receipt of RSUs granted \| Director	7									6
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement award vesting rights								one-third increments on each of the first three anniversaries of the award date
Share-based compensation, number of grants \| shares				0	27,000	2,636,000
Plan 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement award vesting rights								one-third increments on each of the first three anniversaries of the option grant date
Contractual term of option granted								10 years
Unissued common stock reserved for grants \| shares				8,684,274				8,684,274
Plan 2009 \| Restricted Stock Units (RSUs) \| Non-management Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, number of grants \| shares	59,801		62,718
Fair value of units granted \| $	$ 180,000		$ 180,000
Plan 2009 \| Restricted Stock Units (RSUs) \| New Non-Management Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, number of grants \| shares		62,718
Fair value of units granted \| $		$ 248,000
Performance-Based Awards Granted On March 1, 2018 \| Restricted Stock, Performance-Based Units \| Other Senior Excecutives
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement award vesting rights, percentage	21.00%
Performance-Based Awards Granted On March 1, 2018 \| Restricted Stock, Performance-Based Units \| Chief Executive Officer And Chief Financial Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement award vesting rights, percentage	16.80%