Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation - Additional Information (Detail)

v2.4.0.8
Basis of Presentation - Additional Information (Detail) (USD $)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Organization Consolidation And Presentation Of Financial Statements [Abstract]          
Revenues generated by company $ 253,374 $ 264,248 $ 597,449 $ 901,182  
Net loss (9,325,424) (2,555,941) (12,989,419) (11,101,620)  
Cash used in operations     (5,545,205) (3,470,975)  
Accumulated deficit (67,075,781)   (67,075,781)   (54,086,362)
Gross proceeds from private placement of common stock     $ 3,939,800 $ 11,913,442 $ 13,000,000