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Nature of Business and Basis of Presentation - Additional Information (Detail) (USD $)
6 Months Ended 9 Months Ended
Jun. 30, 2013
Dec. 31, 2012
Dec. 31, 2011
Maximum
Sep. 30, 2013
Minimum
Disclosure Nature Of Business and Basis Of Presentation Additional Information [Line Items]        
Working capital deficit $ 5,730,267 $ 3,340,787    
Cash and cash equivalents 5,394 90,192    
Capital to be raised     20,000,000  
Working capital contribution period       2 years
Capital raised during period 692,560      
Conversion of stock, amount issued $ 566,319