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Restricted Cash (Details) (USD $)
3 Months Ended
Mar. 31, 2013
Dec. 31, 2012
Restricted Cash (Textual)    
Restricted cash $ 1,316,503 $ 1,585,138
Description of lifting of restricted cash The restriction will be lifted upon the maturity of the notes payable from March 24 through June 18 during the year of 2013.