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Concentration of Credit Risk (Tables)
 12 Months Ended
Dec. 31, 2012
Revenue Recognition [Abstract]  
Summary of Revenues and Accounts Receivable Contributed by Client
The following is a summary of the approximate amounts of the Company’s revenue and accounts receivable contributed by each of those clients as of the dates and for the periods presented (amounts in thousands):

 
 
2012
 
2011
 
 
Accounts Receivable
 
Revenue
 
% of Total Revenue
 
Accounts Receivable
 
Revenue
 
% of Total Revenue
Material Client Relationship
 
$
720

 
$
10,704

 
31
 %
 
$
1,689

 
$
16,584

 
34
 %
MultiPlan, Inc. (formerly Viant Holdings, Inc.)
 
22

 
2,941

 
8

 
853

 
9,959

 
20

Principal Life Insurance Company
 
26

 
49

 
—

 
95

 
2,619

 
5

Other legacy clients
 
815

 
7,122

 
20

 
1,008

 
7,482

 
16

Clients implemented in 2010 - 2012
 
1,156

 
14,362

 
42

 
909

 
12,884

 
26

Allowance for Uncollectable Receivables/Provision for Refunds
 
(307
)
 
(276
)
 
(1
)
 
(237
)
 
(622
)
 
(1
)
 
 
$
2,432

 
$
34,902

 
100
 %
 
$
4,317

 
$
48,906

 
100
 %