Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Additional Information (Detail)

v2.4.0.8
Stockholders' Equity - Additional Information (Detail) (USD $)
In Millions, except Share data, unless otherwise specified
12 Months Ended 0 Months Ended 12 Months Ended
Dec. 31, 2013
Jul. 27, 2010
Jul. 27, 2010
Stock warrants [Member]
Dec. 31, 2013
Stock warrants [Member]
Dec. 31, 2013
Stock warrants [Member]
Re-measuring [Member]
Dec. 31, 2012
Stock warrants [Member]
Re-measuring [Member]
Stockholders Equity Note [Line Items]            
Number of shares of common stock to be purchased by issuing warrants   250,000        
Exercise price of stock warrants 9.60 9.6        
Date from which warrants or rights exercisable Oct. 14, 2010          
Warrants expiration date Oct. 14, 2015          
Fair value of stock warrants outstanding   $ 2     $ 2 $ 906
Percentage of weighted average expected stock volatility for warrant     111.46%   25.97%  
Contract term of expected life assumption       5 years 1 year 7 months 6 days  
Percentage of risk free rate for warrants     2.07%   0.43%  
Dividend yield 1.61%   0.00%   1.29%