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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The value of the financial instrument(s) that the original debt is being converted into in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.

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Fair Value Measurements - Narrative (Details) € in Thousands, $ in Thousands		1 Months Ended	12 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Jul. 20, 2020	Jun. 24, 2020 EUR (€)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Reclassification of debt conversion option from debt to equity, net (Note 5)	$ 36,952		$ 36,952	$ 0
Unrealized gain on embedded debt conversion option		$ (2,010)	2,010	0
3.00% / 5.00% Convertible Senior Secured PIK Toggle Notes due August 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of debt			108,298
Convertible debt, face value			98,788	0
5.00% / 7.00% Convertible Senior Secured PIK Toggle Notes due August 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of debt			3,728	136,085
Convertible debt, face value			3,958	193,660
Level 3 \| 3.00% / 5.00% Convertible Senior Secured PIK Toggle Notes due August 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Reclassification of debt conversion option from debt to equity, net (Note 5)			36,952
Unrealized gain on embedded debt conversion option			$ 2,010
Revolving Credit Facility \| 15.00% Revolving B (Priority) Credit Facility due February 28, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Stated interest rate (as a percent)			15.00%
Fair value of debt			$ 8,376
Line of credit, face value			$ 8,073	0
Revolving Credit Facility \| 12.00% Revolving B Credit Facility due February 28, 2022(b)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Stated interest rate (as a percent)			12.00%
Fair value of debt			$ 28,423	25,082
Line of credit, face value			$ 29,081	25,788
China Credit Facility
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Stated interest rate (as a percent)					3.60%
Covid-19 \| 1.00% Paycheck Protection Program Term Note due April 28, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Stated interest rate (as a percent)			1.00%
Fair value of debt			$ 8,901
Long term debt, face value			10,000	0
Covid-19 \| France Term Loan [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Stated interest rate (as a percent)						0.00%
Fair value of debt			3,592
Long term debt, face value			$ 7,380	$ 0		€ 6,000
Minimum \| 3.00% / 5.00% Convertible Senior Secured PIK Toggle Notes due August 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Stated interest rate (as a percent)			3.00%
Minimum \| 5.00% / 7.00% Convertible Senior Secured PIK Toggle Notes due August 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Stated interest rate (as a percent)			5.00%
Maximum \| 3.00% / 5.00% Convertible Senior Secured PIK Toggle Notes due August 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Stated interest rate (as a percent)			5.00%
Maximum \| 5.00% / 7.00% Convertible Senior Secured PIK Toggle Notes due August 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Stated interest rate (as a percent)			7.00%