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Debt (Narrative) (Details) - Senior Notes [Member] - USD ($) $ in Millions | Mar. 31, 2022 | Dec. 31, 2021
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Debt instrument interest rate | 8.25% |
Long-term debt, face amount | $ 74.3 | $ 74.3
Long-term debt, current | $ 6.1 | $ 6.1

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