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Summary of Significant Accounting Policies (Details) - USD ($)
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Summary of Significant Accounting Policies [Abstract]      
Cash and cash equivalents - balance sheet $ 400,223 $ 101,078  
Cash included in assets held for sale - balance sheet 596,993 722,194  
Cash and cash equivalents - statements of cash flow $ 997,216 $ 823,272 $ 2,729,795