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Business and Basis of Presentation - Additional Information (Detail) (USD $)
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended 21 Months Ended
Sep. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Dec. 31, 2010
Jun. 30, 2012
Jun. 30, 2011
Dec. 31, 2011
Jun. 30, 2012
Sep. 29, 2011
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]                  
Net loss   $ (14,754,763) $ (34,265) $ (6,931) $ (26,580,876) $ (38,206) $ (10,232,878) $ (36,820,685)  
Cash flows from operating activities   (8,774,379)     (11,558,621) (39,935)   (13,390,570)  
Merger agreement, shares Issued 18,666,733                
Merger agreement, shares received in exchange 18,666,733                
Merger agreement, shares exchange ratio                 1
Share redeemed, aggregate consideration 40,000                
Merger related Professional fees paid 40,000                
Consideration paid for former Stockholders of IAC and their attorney             $ 80,000