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Provision Benefit for Income Taxes (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Components Of Income Tax Expense Benefit [Line Items]                      
Foreign                 $ 191 $ 180 $ 143
Federal                         
State                         
Total Current                 191 180 143
Foreign                         
Federal                 21 48  
State                 6 14  
Total Deferred                 27 62  
Provision for income taxes $ 53 $ 60 $ 54 $ 51 $ 111 $ 55 $ 41 $ 35 $ 218 $ 242 $ 143