Annual report pursuant to section 13 and 15(d)

Subsequent Events - Additional Information (Detail)

v2.4.0.8
Subsequent Events - Additional Information (Detail) (USD $)
 0 Months Ended
Dec. 31, 2013
Non Convertible Senior Notes [Member]
Jan. 31, 2014
Subsequent Events [Member]
December Two Thousand Thirteen Securities Purchase Agreement First Amendment [Member]
Investor
Jan. 31, 2014
Subsequent Events [Member]
December Two Thousand Thirteen Securities Purchase Agreement First Amendment [Member]
Non Convertible Senior Notes [Member]
Subsequent Event [Line Items]      
Private placement transaction, securities offered value   $ 12,160,000  
Private placement transaction, additional securities offered value   $ 2,160,000  
Number of secondary investors   14  
Private placement transaction, debt instrument stated interest rate 9.00%   9.00%
Private placement transaction, debt instrument maturity date     Jan. 31, 2016
Private placement transaction, common stock shares under warrants issued   227,372  
Private placement transaction, exercise price of warrants   4.75  
Private placement transaction, warrant expiration date   Jan. 31, 2019