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10. Income Taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Income Taxes Details    
Expected tax (credit) $ (513) $ 986
State income taxes, net of federal tax benefits (60) 116
Decrease in land inventory basis 0 (160)
Decrease in environmental liability 7 2
Increase (decrease in valuation allowance) 623 (944)
Income Tax Expense Benefit Continuing Operations $ 57 $ 0
Expected tax (credit), Percentage (34.00%) 34.00%
State income taxes, net of federal tax benefits, Percentage (4.00%) 4.00%
Decrease in land inventory basis, Percentage 0.00% (6.00%)
Decrease in environmental liability, Percentage 0.00% 0.00%
Increase (decrease in valuation allowance) Percentage 41.00% (32.00%)
Effective Income Tax Rate Continuing Operations 3.00% 0.00%