Discontinued Operations - Summary of Significant Non-Cash Items, Investments and Purchases of Property, Plant and Equipment on Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation and amortization	$ 4,810	$ 6,577
Unrealized and realized (appreciation) depreciation on equity securities and preferred stock, net	106	(70)
Equity in net loss of EnviroFlight	389	1,640
Stock-based compensation expense	4,372	9,054
Deferred income taxes	0	(508)
Gain on sale of discontinued operations	(672)	0
Loss on release of cumulative foreign currency translation adjustment	26,957	0
Cash flows from investing activities
Purchases of property, plant and equipment	(3,152)	(11,523)
TS Biotechnology Holdings LLC and EnviroFlight LLC | Discontinued Operations, Held-for-sale
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation and amortization	0	1,233
Unrealized and realized (appreciation) depreciation on equity securities and preferred stock, net	106	379
Equity in net loss of EnviroFlight	38	892
Stock-based compensation expense	(1,346)	806
Deferred income taxes	0	(481)
Gain on sale of discontinued operations	(672)	0
Loss on release of cumulative foreign currency translation adjustment	26,957	0
Cash flows from investing activities
Purchases of property, plant and equipment	$ (382)	$ (7,700)