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Convertible Subordinated Notes (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Mar. 12, 2021
Debt Instrument [Line Items] |  |  |
Convertible Preferred Stock, Nonredeemable or Redeemable, Issuer Option, Value |  |  | $ 2.4
Payments for Repurchase of Redeemable Convertible Preferred Stock, Cash Payment | $ 3.8 |  |
Additional Paid-in Capital |  |  |
Debt Instrument [Line Items] |  |  |
Adjustments to Additional Paid in Capital, Other | (1.4) |  |
Adjustments to Additional Paid in Capital, Other | $ 1.4 |  |
Convertible subordinated notes |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate (in percent) |  | 2.75% |
Long-term Debt |  |  | $ 0.2
Interest Rate, Unamortized Debt Discount and Debt Issuance Costs, Effective Percentage | 3.10% | 3.10% |

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