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Stockholders' Equity - Additional Information (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Jun. 16, 1999
Class of Stock [Line Items]      
Liquidation value of outstanding preferred stock $ 3,649    
Preferred stock voting right Series AA preferred stock is entitled to one vote per share and the Class A preferred stock is not entitled to vote    
Class B common stock voting rights Holders of Class B common stock have ten votes per share on all matters in which the holders of common stock are entitled to vote and holders of Class A common stock have one vote per share on such matters    
Series AA Preferred Stock [Member]
      
Class of Stock [Line Items]      
Preferred stock, shares authorized 5,720 5,720 5,720
Preferred stock, par value $ 0.001 $ 0.001  
Dividends paid to preferred stock $ 15.95    
Amount entitled $ 638    
Preferred Class A [Member]
      
Class of Stock [Line Items]      
Preferred stock, shares authorized 10,000 10,000 1,000,000
Preferred stock, par value $ 638 $ 638  
Dividends paid to preferred stock $ 15.95    
Amount entitled $ 638