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Revenue Recognition (Revenue and Accounts Receivable) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Dec. 31, 2011
Concentration Risk [Line Items]          
Allowance for Uncollectable Receivables $ (307) $ (165) $ (307) $ (165)  
Accounts Receivable, Net 3,338 5,297 3,338 5,297 4,317
Provision for refunds (61) (68) (110) (304)  
Revenue, Net 8,215 11,308 17,616 24,385  
Sales Revenue
         
Concentration Risk [Line Items]          
% of Total Revenue 100.00% 100.00% 100.00% 100.00%  
Sales Revenue | Provision for refunds
         
Concentration Risk [Line Items]          
% of Total Revenue (1.00%) (1.00%) (1.00%) (1.00%)  
Customer Concentration Risk | Material Client Relationship
         
Concentration Risk [Line Items]          
Accounts Receivable, Gross 1,366 1,864 1,366 1,864  
Revenue, Gross 3,050 3,071 5,953 8,178  
Customer Concentration Risk | MultiPlan, Inc.
         
Concentration Risk [Line Items]          
Accounts Receivable, Gross 154 1,067 154 1,067  
Revenue, Gross 682 2,455 1,706 5,259  
Customer Concentration Risk | All Others
         
Concentration Risk [Line Items]          
Accounts Receivable, Gross 2,125 2,531 2,125 2,531  
Revenue, Gross $ 4,544 $ 5,850 $ 10,067 $ 11,252  
Customer Concentration Risk | Sales Revenue | Material Client Relationship
         
Concentration Risk [Line Items]          
% of Total Revenue 37.00% 27.00% 34.00% 33.00%  
Customer Concentration Risk | Sales Revenue | MultiPlan, Inc.
         
Concentration Risk [Line Items]          
% of Total Revenue 8.00% 22.00% 10.00% 22.00%  
Customer Concentration Risk | Sales Revenue | All Others
         
Concentration Risk [Line Items]          
% of Total Revenue 56.00% 52.00% 57.00% 46.00%