Condensed Consolidated Statements of Operations and Comprehensive Loss (Parenthetical) - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
(Loss)/gain on disposal of discontinued operations	$ (1,022)	$ 30,672

Amount after tax of gain (loss) not previously recognized resulting from the disposal of a discontinued operation.

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