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Income Taxes - Additional Information (Details) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
	Jul. 22, 2020	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Schedule Of Income Taxes [Line Items]
Provision for income taxes		$ 144		$ 3	$ 224	$ 9,041
Effective tax rate		2.50%		0.20%	2.70%	(120.40%)
Statutory rate			21.00%
Increase in assets due to change in tax rates on deferred tax assets	$ 900
UK
Schedule Of Income Taxes [Line Items]
Statutory rate	19.00%

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