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Commitments and Contingencies - Additional Information (Detail) (USD $)
Jun. 30, 2014
Dec. 31, 2013
Jun. 30, 2013
Jan. 02, 2013
Commitments And Contingencies Disclosures [Abstract]        
Consolidated cash balance $ 5,731,262 $ 21,322,257 $ 10,337,619 $ 10,096,414