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Net Loss per Common Share - Additional Information (Detail) - shares
6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Net Income Loss Per Common Share [Line Items]    
Companies common stock share outstanding 9,000,000  
Antidilutive securities 40,982,544 56,844,341
Shares loaned under the share lending arrangement 9,000,000 9,000,000