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Summary of Significant Accounting Policies - Schedule of Dilutive Securities Excluded from Computation of Diluted Net Income Per Share (Detail) (USD $)
 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Accounting Policies [Abstract]        
Net income (loss) $ 6,603,982 $ 2,600,514 $ 2,944,149 $ 10,466,582
Less: undistributed earnings allocated to participating securities (6,434,756) (2,600,514) (2,944,149) (10,466,582)
Net income (loss) allocable to common shares 169,226         
Basic weighted average common shares outstanding 1,184,507 1,092,307 1,463,798 1,078,145
Basic income (loss) per common share $ 0.14 $ 0.00 $ 0.00 $ 0.00
Net income (loss) 6,603,982 2,600,514 2,944,149 10,466,582
Less: undistributed earnings allocated to participating securities and other add-backs to net income (loss) (6,403,843) (2,600,514) (2,944,149) (10,466,582)
Net income (loss) allocable to common shares $ 200,139         
Basic weighted average common shares outstanding 1,184,507 1,092,307 1,463,798 1,078,145
Effect of dilutive securities 20,058,471 20,410,117 20,445,061 20,334,703
Diluted weighted average common shares outstanding 21,242,978 21,502,424 21,908,859 21,412,848
Diluted income per common share $ 0.01 $ 0.00 $ 0.00 $ 0.00