Taxation - Schedule of Reconciliation of Income Tax Expense Benefit (Detail) - USD ($) $ in Thousands |
6 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2021 |
Jun. 30, 2020 |
Dec. 31, 2020 |
Dec. 31, 2019 |
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| Disclosure Of Income Taxes [Abstract] | ||||
| Loss before tax | $ (78,215) | $ (87,876) | $ (183,391) | $ (145,846) |
| Tax on loss on ordinary activities at standard CT rate (19.00%) | (34,844) | (27,711) | ||
| Expenses not deductible for tax purposes | 4,142 | 187 | ||
| Foreign tax | 0 | 4 | ||
| Additional deduction for R&D expenditure | 0 | (2,563) | ||
| Surrender of tax losses for R&D tax credit refund | 0 | 1,074 | ||
| Adjustments to tax in respect of previous periods | 4,070 | (2,102) | ||
| Deferred tax not recognised | 31,271 | 25,552 | ||
| Tax provision (benefit) for the period | $ (2,493) | $ 2,937 | $ 4,639 | $ (5,559) |
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- Definition Disclosure of income taxes [Abstract]. No definition available.
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- Definition Tax effect of deferred tax not recognised. No definition available.
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- Definition Tax effect of prior year adjustments. No definition available.
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- Definition Tax effects of additional deduction for research and development expenditure. No definition available.
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- Definition Tax effects of surrender of tax losses for research and development tax credit refund. No definition available.
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- Definition The aggregate amount included in the determination of profit (loss) for the period in respect of current tax and deferred tax. [Refer: Current tax expense (income); Deferred tax expense (income)] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The profit (loss) before tax expense or income. [Refer: Profit (loss)] Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that relates to expenses not deductible in determining taxable profit (tax loss). [Refer: Accounting profit] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that relates to foreign tax rates. [Refer: Accounting profit] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The product of the accounting profit multiplied by the applicable tax rate(s). [Refer: Accounting profit; Applicable tax rate] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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