Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation - Additional Information (Detail)

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Basis of Presentation - Additional Information (Detail) (USD $)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Dec. 31, 2013
Dec. 31, 2012
Organization, Consolidation and Presentation of Financial Statements [Abstract]            
Revenues generated by company $ 201,010 $ 253,374 $ 719,422 $ 597,449    
Net loss (1,029,544) (9,325,424) (4,565,947) (12,989,419)    
Cash used in operations     (4,378,396) (5,545,205)    
Accumulated deficit 74,721,063   74,721,063   70,155,116  
Gross proceeds from issuance of common stock through private placement       $ 3,939,800 $ 14,900,000 $ 13,000,000