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Note 13 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($)
Dec. 31, 2016
Dec. 31, 2015
Net operating losses $ 7,288,000 $ 4,566,000
Environmental and closure reserves 3,189,000 2,497,000
Other 2,285,000 2,800,000
Depreciation and amortization (162,000) (1,130,000)
Goodwill and indefinite lived intangible assets (2,362,000) (5,443,000)
Prepaid expenses (72,000) (122,000)
10,166,000 3,168,000
Valuation allowance (12,528,000) (8,592,000)
Net deferred income tax liabilities $ (2,362,000) $ (5,424,000)