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Commitments and Contingencies - Additional Information (Detail) (USD $)
Sep. 30, 2014
Dec. 31, 2013
Sep. 30, 2013
Jan. 02, 2013
Gain Contingencies [Line Items]        
Consolidated cash balance $ 3,711,573 $ 21,322,257 $ 11,173,036 $ 10,096,414
Maximum [Member]
       
Gain Contingencies [Line Items]        
Value of shares $ 1.00      
Minimum [Member]
       
Gain Contingencies [Line Items]        
Value of shares $ 1.00