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Future Minimum Payment (Detail) (USD $)
Jun. 30, 2012
Dec. 31, 2011
Sale Leaseback Transaction [Line Items]    
2013 $ 1,641,131  
2014 1,641,131  
2015 1,641,131  
2016 1,641,133  
Total 6,564,526  
Unamortized interest (986,646)  
Total long term payable 5,577,880  
Current portion 1,234,665 1,183,516
Non current portion $ 4,343,215 $ 4,999,718