Income taxes - Change in Tax Rate (Details) |
12 Months Ended | |||||
|---|---|---|---|---|---|---|
Apr. 01, 2023 |
Mar. 31, 2023 |
Dec. 31, 2023
USD ($)
|
Dec. 31, 2023
GBP (£)
|
Dec. 31, 2022 |
Dec. 31, 2021 |
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| Income taxes | ||||||
| Gain on bargain purchase | $ 22,049,000 | |||||
| U.K. | ||||||
| Income taxes | ||||||
| Tax rate (as a percent) | 25.00% | 19.00% | 23.50% | 23.50% | 19.00% | 19.00% |
| Difference in tax rates | 25.00% | 25.00% | ||||
| U.S. | ||||||
| Income taxes | ||||||
| Gain on bargain purchase | $ 22,049,000 | |||||
| Difference in tax rates | 21.00% | 21.00% | 21.00% | 21.00% | ||
| His Majesty's Revenue and Customs (HMRC) | ||||||
| Income taxes | ||||||
| Tax rate (as a percent) | 23.50% | 23.50% | 19.00% | 19.00% | ||
| Operating Loss Carryforwards | $ 563,883,000 | |||||
| Expenditure credit carryforward | $ 915,000 | |||||
| Annual allowance | £ | £ 5,000,000 | |||||
| Percentage on taxable profit | 50.00% | |||||
| Internal Revenue Service (IRS) | ||||||
| Income taxes | ||||||
| Operating Loss Carryforwards | $ 366,609,000 | |||||
| Expenditure credit carryforward | 179,519,000 | |||||
| Tax credit carryforwards | $ 3,759,000 | |||||
| Tax credit carried forward period | 20 years | 20 years | ||||
| X | ||||||||||
- Definition Percentage of domestic federal statutory tax rate applicable to deferred taxes. No definition available.
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| X | ||||||||||
- Definition Amount of expenditure credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. No definition available.
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| X | ||||||||||
- Definition Amount of annual allowance for operating loss carryforwards and tax credit carryforward. No definition available.
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| X | ||||||||||
- Definition "Percentage on taxable profit for operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws, and the amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws." No definition available.
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| X | ||||||||||
- Definition It represents the period of tax credit carryforwards can be carried forward. No definition available.
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| X | ||||||||||
- Definition In a business combination in which the amount of net identifiable assets acquired and liabilities assumed exceeds the aggregate consideration transferred or to be transferred (as defined), this element represents the amount of gain recognized by the entity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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