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Income Taxes - Narrative (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
NOL carryforwards |  |  |
Income tax provision (benefit) | $ 2,555,000 | $ 1,383,000 | $ (1,758,000)
Effective tax rate | 0.00% | 0.00% | 0.00%
Deferred tax assets, net of valuation allowance | $ 22,506,000 | $ 24,827,000 |
Increase (decrease) in valuation allowance | 158,900,000 | 157,700,000 |
Disallowed interest expense | 28,300,000 |  |
Unrecognized tax benefits, interest and penalties accrued | 0 | 0 |
Tax benefit | 14,753,000 | $ 11,539,000 | $ 7,382,000
United Kingdom |  |  |
NOL carryforwards |  |  |
Operating loss carryforwards | 21,200,000 |  |
Switzerland |  |  |
NOL carryforwards |  |  |
Operating loss carryforwards | 75,800,000 |  |
Federal |  |  |
NOL carryforwards |  |  |
Net operating loss carryforwards for income tax purposes | 1,800,000,000 |  |
Tax credit carryforwards | 190,200,000 |  |
Operating loss carryforwards | 1,600,000,000 |  |
Various states |  |  |
NOL carryforwards |  |  |
Tax credit carryforwards | 4,700,000 |  |
Operating loss carryforwards | 1,100,000,000 |  |
Ireland |  |  |
NOL carryforwards |  |  |
Operating loss carryforwards, non-trading loss | $ 361,000,000 |  |

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