Income taxes - Income before Income Taxes (Details) - USD ($) $ in Thousands |
12 Months Ended | |
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Dec. 31, 2019 |
Dec. 31, 2018 |
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| Income taxes | ||
| Loss before income taxes | $ (136,923) | $ (95,017) |
| United States | ||
| Income taxes | ||
| Loss before income taxes | (494) | (1,650) |
| United Kingdom | ||
| Income taxes | ||
| Loss before income taxes | $ (136,429) | $ (93,367) |
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- Definition Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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