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Income Taxes - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Operating Loss Carryforwards [Line Items] |  |  |
Research and development tax credits utilized | $ 2.2 |  |
Tax credit carryforwards subject to expiration | 1.8 |  |
Change in net deferred tax assets | 1.5 |  |
Goodwill purchase accounting adjustments | 7.3 |  |
Tax effect of unrealized loss on investments | 0.5 |  |
Deferred tax expense | 4.9 |  |
Convertible debt adjustments | 1.1 |  |
Valuation allowance amount | 69.9 | $ 55.5 |
Unrecognized tax benefits that would impact effective tax rate | $ 29.5 | $ 23.5 | $ 0.0
Possible extension period of tax holiday | 3 years |  |
Undistributed foreign earnings | $ 15.3 |  |
California and Foreign |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Valuation allowance amount | $ 69.9 |  |

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