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Debt and Credit Arrangements - Fair Value Disclosures about Debt (Details)	Sep. 30, 2021	Dec. 31, 2020
Convertible Debt | Convertible Notes, due 2024
Debt Instrument
Debt instrument percentage over par value	333.00%	210.00%

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- Definition

Debt Instrument Fair Value Percentage Over Par Value

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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.

+ References

No definition available.

+ Details

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- Details

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- Details

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