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Commitments and Contingencies Narrative (Detail) (USD $)
1 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 12 Months Ended
May 31, 2008
Oct. 31, 2001
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2013
Clawback Liability [Member]
Jun. 30, 2013
Employee Severance [Member]
Dec. 31, 2013
Employee Severance [Member]
Dec. 31, 2013
Letter of credit [Member]
Dec. 31, 2013
Accrued expenses and other current liabilities [Member]
Dec. 31, 2013
Other long-term liabilities [Member]
Dec. 31, 2013
Private equity funds [Member]
Commitment Contingencies And Guarantees [Line Items]                        
Lease expiration year     2017                  
Total rental expense under operating leases     $ 600,000 $ 600,000 $ 500,000              
Future minimum lease payments under non-cancelable operating leases 2014     500,000                  
Future minimum lease payments under non-cancelable operating leases 2015     400,000                  
Company outstanding guarantees     3,800,000         2,400,000        
Committed capital of private equity funds                       100,000
Funding period                       12 months
Accrued expenses and other current liabilities           1,300,000            
Accrued expenses     2,431,000 2,601,000   1,000,000            
Other long-term liabilities     3,683,000 3,921,000   300,000            
Company's ownership in the funds           19.00%            
Proceeds from sale of business 6,400,000   38,974,000 17,596,000 171,268,000              
Annual payments   650,000                    
Liability to former chairman and chief executive officer, current                   800,000    
Liability to former chairman and chief executive officer, non-current                     2,600,000  
Letters of credit outstanding                 6,300,000      
Letter of credit expiration date                 Mar. 19, 2019      
Severance charge             $ 900,000