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Discontinued Operations - Summary of Significant Non-Cash Items, Investments and Purchases of Property, Plant and Equipment on Cash Flows - TS Biotechnology and EnviroFlight (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Oct. 31, 2019 | Sep. 30, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Adjustments to reconcile net loss to net cash used in operating activities |  |  |  |  |
Depreciation and amortization |  |  | $ 17,516 | $ 24,896 | $ 33,112
Impairment of goodwill |  | $ 178 | 9,635 | 87,862 | 0
Impairment of other noncurrent assets |  |  | 13,326 | 32,627 | 60,504
Gain on sale of discontinued operations |  |  | (672) | 0 | 0
Loss on release of cumulative foreign currency translation adjustment |  |  | 26,957 | 0 | 0
Unrealized and realized depreciation on equity securities and preferred stock, net | $ (7,348) |  | 106 | (7,833) | 30,200
Equity in net loss of EnviroFlight |  |  | 1,176 | 6,730 | 11,608
Stock-based compensation expense |  |  | 18,366 | 18,950 | 36,296
Deferred income taxes |  |  | (156) | (3,674) | (21,278)
Investments in EnviroFlight |  |  | 0 | (3,713) | (16,582)
Purchases of property, plant and equipment |  |  | (7,527) | (37,883) | (41,587)
Discontinued Operations, Disposed of by Sale |  |  |  |  |
Adjustments to reconcile net loss to net cash used in operating activities |  |  |  |  |
Loss on release of cumulative foreign currency translation adjustment |  |  | 26,957 |  |
TS Biotechnology Holdings LLC and Enviro Flight LLC | Discontinued Operations, Disposed of by Sale |  |  |  |  |
Adjustments to reconcile net loss to net cash used in operating activities |  |  |  |  |
Depreciation and amortization |  |  | 0 | 5,107 | 9,007
Impairment of goodwill |  |  | 0 | 58,042 | 0
Impairment of other noncurrent assets |  |  | 0 | 31,637 | 60,504
Gain on sale of discontinued operations |  |  | (672) | 0 | 0
Loss on release of cumulative foreign currency translation adjustment |  |  | 26,957 | 0 | 0
Unrealized and realized depreciation on equity securities and preferred stock, net |  |  | 106 | 458 | 1,927
Stock-based compensation expense |  |  | (1,346) | 2,507 | 3,872
Deferred income taxes |  |  | 0 | (2,710) | (5,703)
Purchases of property, plant and equipment |  |  | (382) | (23,326) | (21,191)
EnviroFlight Sale | Discontinued Operations, Disposed of by Sale |  |  |  |  |
Adjustments to reconcile net loss to net cash used in operating activities |  |  |  |  |
Loss on release of cumulative foreign currency translation adjustment |  |  | 0 |  |
Equity in net loss of EnviroFlight |  |  | 38 | 4,314 | 2,622
Investments in EnviroFlight |  |  | $ 0 | $ (2,000) | $ (12,250)

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