Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Income Tax Contingency [Line Items]
Provision for (benefit from) income taxes	$ 598	$ (339)		$ (253)	$ 13
Income tax provision on operating income	900			1,500
Income tax benefit from settlement of uncertain tax benefits	$ (300)			(300)
Valuation allowance						$ 55,400
Increase in valuation allowance recorded as an expense				33,600		35,100
Decrease in valuation allowance charged to equity						(28,200)
Income tax benefit recognized as result of CARES Act			$ 600
Foreign Tax Authority
Income Tax Contingency [Line Items]
Increase in valuation recorded						$ 6,900
Income tax benefit from settlement of uncertain tax benefits				$ (1,500)