Assets Held for Sale and Discontinued Operations - Summary of Results of Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue	$ 9,536	$ 25,887	$ 52,137	$ 59,981
Cost of sales	10,221	23,601	58,687	72,005
Gross (loss) profit	(685)	(2,286)	(6,550)	(12,024)
Research and development	0	0	1,590	0
Selling and marketing	2,744	11,681	35,661	35,618
General and administrative	3,531	4,510	15,064	14,378
Total operating expenses	6,275	16,191	52,315	49,996
Interest and other income (expense), net	90	(18)	61	139
Net loss from discontinued operations	$ (6,870)	$ (13,923)	$ (58,804)	$ (61,881)