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Consolidated Statements of Operations Parenthetical (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax $ 0us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax $ 3,177,183us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax $ 1,406,608us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax