Annual report pursuant to Section 13 and 15(d)

Stock Warrants (Additional Information) (Detail)

v2.4.0.8
Stock Warrants (Additional Information) (Detail) (USD $)
12 Months Ended 0 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended 0 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Aug. 05, 2013
Warrants 1
Aug. 05, 2013
Warrants 2
Dec. 31, 2013
Minimum
Aug. 05, 2013
Minimum
Warrants 1
Aug. 05, 2013
Minimum
Warrants 2
Dec. 31, 2013
Maximum
Aug. 05, 2013
Maximum
Warrants 1
Aug. 05, 2013
Maximum
Warrants 2
Class of Warrant or Right [Line Items]                    
Outstanding Warrants Expiration Date         Dec. 31, 2014     Aug. 05, 2018    
Weighted average term of warrants 4 years 2 months 12 days                  
Weighted average exercise price of warrants per share $ 2.75         $ 2.25 $ 2.25   $ 4.72 $ 5.24
Warrants Exercisable Share     $ 206,420 $ 38,168            
Class Of Warrant Or Right Grants In Period 6,551,654 0                
Warrants Issued Aggregate Fair Value $ 9,067,283