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Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
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Income Tax Disclosure [Abstract] |  |
Net operating losses | $ 9,391 | $ 9,540
Environmental and closure reserves | 1,977 | 2,124
Lease liability | 742 |
Other | 1,295 | 1,263
Depreciation and amortization | (3,211) | (2,418)
Goodwill and indefinite lived intangible assets | (590) | (586)
Right-of-use lease asset | (730) |
481(a) adjustment | (336) |
Prepaid expenses | (22) | (30)
Deferred tax assets liabilities gross | 8,516 | 9,893
Valuation allowance | (9,106) | (10,479)
Net deferred income tax liabilities | $ (590) | $ (586)

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