Quarterly report pursuant to Section 13 or 15(d)

Discontinued Operations - Schedule of Disposal Groups, Including Discontinued Operation Balance Sheet (Details)

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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.