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Fair Value Measurements (Details) - USD ($)
Jun. 30, 2015
Dec. 31, 2014
Carrying value    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value $ 5,501,377 $ 9,004,991
Recurring | Fair Value Measurement | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value $ 5,501,377 $ 9,004,991