Discontinued Operations - Summary of Financial Data for Equity Method Investments Included in Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Current assets	$ 151,116		$ 151,116		$ 234,643
Total assets	336,186		336,186		455,763
Current liabilities	30,661		30,661		122,912
Total liabilities	277,634		277,634		384,052
Net loss	$ (29,508)	$ (53,634)	(128,860)	$ (154,701)
Equity Method Investment, Nonconsolidated Investee or Group of Investees | EnviroFlight Sale | Discontinued Operations, Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Current assets					703
Noncurrent assets					30,549
Total assets					31,252
Current liabilities					2,352
Non-current liabilities					88
Total liabilities					2,440
Net assets					$ 28,812
Revenues		139	16	363
Operating expenses		2,480	92	6,561
Operating loss		(2,341)	(76)	(6,198)
Other, net		5	0	17
Net loss		$ (2,336)	$ (76)	$ (6,181)