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Discontinued Operations - Schedule of Disposal Groups, Including Discontinued Operation Balance Sheet (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Discontinued Operations and Disposal Groups [Abstract]    
Other assets $ 99 $ 107
Total current assets 99 107
Property, plant and equipment, net [1] 81 81
Other assets 57 118
Total long-term assets 138 199
Total assets 237 306
Accounts payable 19 10
Accrued expenses and other liabilities 286 296
Environmental liabilities 418 50
Total current liabilities 723 356
Closure liabilities 132 126
Environmental liabilities 459 837
Total long-term liabilities 591 963
Total liabilities $ 1,314 $ 1,319
[1] Net of accumulated depreciation of $10,000 for each period presented.