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Basis of Presentation and Significant Accounting Policies - Purchased Receivables, Income Taxes, and Share Repurchases (Details) - USD ($) $ in Millions | Jun. 30, 2024 | Dec. 31, 2023
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Basis of Presentation and Significant Accounting Policies |  |
Purchased receivables included in royalty and commercial payment receivables, Cost recovery method | $ 0.4 | $ 0.0
Purchased receivables included in royalty and commercial payment receivables, Effective interest rate method | 12.4 | $ 0.0
Income tax penalties or interest charged | 0.0 |
Treasury stock (in dollars) | $ 0.0 |

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