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- Definition

Employee Service Second Lien Note Based Period For Recognition.

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- Definition

Long-Term Debt, Portion Existing Convertible Note Exchanged

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- Definition

Stock Issued During Period, Shares, Conversion Of Debt.

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- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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- Definition

Amount, after tax, of expense for award under share-based payment arrangement.

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No definition available.

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- Definition

Including the current and noncurrent portions, carrying amount of debt identified as being convertible into another form of financial instrument (typically the entity's common stock) as of the balance sheet date, which originally required full repayment more than twelve months after issuance or greater than the normal operating cycle of the company.

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- Definition

The number of equity instruments that the holder of the debt instrument would receive if the debt was converted to equity.

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- Definition

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

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- Definition

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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- Definition

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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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued 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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- Definition

Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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- Definition

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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- Definition

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

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- Definition

Number of options outstanding, including both vested and non-vested options.

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- Definition

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

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Share-based Compensation - Narrative (Details) $ / shares in Units, shares in Thousands, item in Thousands		12 Months Ended
	Mar. 27, 2020 USD ($) shares	Dec. 31, 2020 USD ($) item $ / shares shares	Dec. 31, 2019 USD ($) $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum shares issuable under stock plans (in shares) \| shares		395
Vesting period (in years)		3 years
Share based compensation expense		$ 816,000	$ 2,862,000
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Convertible debt, face value		$ 137,000
Number of shares convertible (in shares) \| item		30
Unvested grant date fair value (in dollars per share) \| $ / shares		$ 5.60	$ 31.30
Granted (in dollars per share) \| $ / shares		$ 3.80
Performance share unit awards granted (in shares) \| shares		59
Unrecognized compensation expense		$ 39,000
Weighted average recognition period		1 year 7 months 6 days
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of PSUs outstanding (in shares) \| shares		75
Recognized compensation expense related to PSUs		$ 0
5.00% / 7.00% Convertible Senior Secured PIK Toggle Notes due August 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Convertible debt, face value		3,958,000	$ 193,660,000
5.00% / 7.00% Convertible Senior Secured PIK Toggle Notes due August 31, 2022 \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate principal amount of existing notes tendered and accepted in exchange	$ 1,613,000
3.00% / 5.00% Convertible Senior Secured PIK Toggle Notes due August 31, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Convertible debt, face value		98,788,000	$ 0
3.00% / 5.00% Convertible Senior Secured PIK Toggle Notes due August 31, 2024 \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate principal amount of existing notes tendered and accepted in exchange	$ 793,000
Shares issued upon conversion of debt (in shares) \| shares	586
Unrecognized compensation expense		$ 94,000
Employee Service Second Lien Note Based Period For Recognition		1 year 8 months 12 days
Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage vesting based defined enterprise value		50.00%
Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage vesting based defined enterprise value		50.00%
Minimum \| 5.00% / 7.00% Convertible Senior Secured PIK Toggle Notes due August 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stated interest rate (as a percent)		5.00%
Minimum \| 3.00% / 5.00% Convertible Senior Secured PIK Toggle Notes due August 31, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stated interest rate (as a percent)		3.00%
Maximum \| 5.00% / 7.00% Convertible Senior Secured PIK Toggle Notes due August 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stated interest rate (as a percent)		7.00%
Maximum \| 3.00% / 5.00% Convertible Senior Secured PIK Toggle Notes due August 31, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stated interest rate (as a percent)		5.00%