Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Summary of Outstanding Notes Receivable from an Employee for the Exercise of Stock Options (Detail)

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Stockholders' Equity - Summary of Outstanding Notes Receivable from an Employee for the Exercise of Stock Options (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Debt Conversion [Line Items]    
Outstanding Balance of Employee Loan $ 375 $ 375
Note Outstanding One [Member]
   
Debt Conversion [Line Items]    
Date Issued 2006-11  
Outstanding Balance of Employee Loan $ 375 $ 375
Maturity Date of Note 2015-11  
Interest Rate on Note 8.15%