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Discontinued Operations - Schedule of Disposal Groups, Including Discontinued Operation Balance Sheet (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Discontinued Operations and Disposal Groups [Abstract] |  |  |
Other assets |  | $ 20 | $ 22
Total current assets |  | 20 | 22
Property, plant and equipment, net | [1] | 81 | 81
Other assets |  |  |
Total long-term assets |  | 81 | 81
Total assets |  | 101 | 103
Accounts payable |  | 4 | 4
Accrued expenses and other liabilities |  | 154 | 150
Environmental liabilities |  | 659 | 744
Total current liabilities |  | 817 | 898
Closure liabilities |  | 144 | 142
Environmental liabilities |  | 152 | 110
Total long-term liabilities |  | 296 | 252
Total liabilities |  | $ 1,113 | $ 1,150
[1] | Net of accumulated depreciation of $10,000 for each period presented.

X
- Definition Amount classified as current assets attributable to discontinued operations not held for sale. + References No definition available. + Details
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- Definition Amount classified as environmental liabilities attributable to discontinued operations not held for sale. + References No definition available. + Details
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- Definition Amount classified as accrued expenses and other liabilities attributable to discontinued operations not held for sale. + References No definition available. + Details
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- Definition Amount classified as current and noncurrent assets attributable to discontinued operations not held for sale. + References No definition available. + Details
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- Definition Amount classified as assets attributable to disposal group held for sale or disposed of, expected to be disposed of after one year or the normal operating cycle, if longer. + References No definition available. + Details
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- Definition Represents closure liabilities of discontinued operations not held for sale. + References No definition available. + Details
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