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Summary of Significant Accounting Policies (Details) (USD $)
12 Months Ended
Dec. 31, 2012
Segment
Service
Dec. 31, 2011
Position
Summary of Significant Accounting Policies [Abstract]    
Minimum maturity period to consider instruments as investments 90 days  
Allowance included in trade receivables $ 300,000 $ 300,000
Allowance for doubtful accounts included in receivable during the period 700,000 600,000
Bad debt expense 316,000 521,000
Concentration Risk [Line Items]    
Number of services or products offered 2  
Property, Plant and Equipment [Line Items]    
Net value 2,700,000  
Fair value 400,000  
Amortization period for internal-use software development costs 3 years  
Restructuring charge 169,000 889,000
Number of full time positions eliminated   20
Number of full time positions eliminated (in hundredths)   35.00%
Share-based compensation expense recognized $ 227,000 $ 361,000
Number of operating segments 1  
Computer Equipment [Member] | Minimum [Member]
   
Property, Plant and Equipment [Line Items]    
Estimated useful life of property, plant and equipment 3 years  
Computer Equipment [Member] | Maximum [Member]
   
Property, Plant and Equipment [Line Items]    
Estimated useful life of property, plant and equipment 4 years  
Furniture and Fixtures [Member] | Minimum [Member]
   
Property, Plant and Equipment [Line Items]    
Estimated useful life of property, plant and equipment 5 years  
Furniture and Fixtures [Member] | Maximum [Member]
   
Property, Plant and Equipment [Line Items]    
Estimated useful life of property, plant and equipment 7 years  
Software [Member] | Minimum [Member]
   
Property, Plant and Equipment [Line Items]    
Estimated useful life of property, plant and equipment 2 years  
Software [Member] | Maximum [Member]
   
Property, Plant and Equipment [Line Items]    
Estimated useful life of property, plant and equipment 3 years  
Accounts Receivable [Member]
   
Concentration Risk [Line Items]    
Minimum reportable percentage for concentration of credit risk (in hundredths) 10.00%  
Accounts Receivable [Member] | Company 1 [Member]
   
Concentration Risk [Line Items]    
Concentration risk, percentage (in hundredths) 54.00% 12.00%
Net Revenue [Member]
   
Concentration Risk [Line Items]    
Minimum reportable percentage for concentration of credit risk (in hundredths) 10.00%  
Net Revenue [Member] | United States [Member]
   
Concentration Risk [Line Items]    
Concentration risk, percentage (in hundredths) 49.00% 70.00%
Net Revenue [Member] | Europe, Middle East and Africa [Member]
   
Concentration Risk [Line Items]    
Concentration risk, percentage (in hundredths) 46.00% 21.00%
Net Revenue [Member] | Company 1 [Member]
   
Concentration Risk [Line Items]    
Concentration risk, percentage (in hundredths) 28.00% 0.00% [1]
Net Revenue [Member] | Company 2 [Member]
   
Concentration Risk [Line Items]    
Concentration risk, percentage (in hundredths) 0.00% [1] 11.00%
Net Revenue [Member] | Company 3 [Member]
   
Concentration Risk [Line Items]    
Concentration risk, percentage (in hundredths) 0.00% [1] 11.00%
Net Revenue [Member] | Advertiser Networks [Member]
   
Concentration Risk [Line Items]    
Concentration risk, percentage (in hundredths) 93.00% 95.00%
Net Revenue [Member] | Publisher Solutions [Member]
   
Concentration Risk [Line Items]    
Concentration risk, percentage (in hundredths) 7.00% 5.00%
Traffic Acquisition Costs [Member]
   
Concentration Risk [Line Items]    
Minimum reportable percentage for concentration of credit risk (in hundredths) 10.00%  
Traffic Acquisition Costs [Member] | Distribution Partner 1 [Member]
   
Concentration Risk [Line Items]    
Concentration risk, percentage (in hundredths) 29.00% 0.00% [1]
Traffic Acquisition Costs [Member] | Distribution Partner 2 [Member]
   
Concentration Risk [Line Items]    
Concentration risk, percentage (in hundredths) 11.00% 0.00% [1]
Traffic Acquisition Costs [Member] | Distribution Partner 3 [Member]
   
Concentration Risk [Line Items]    
Concentration risk, percentage (in hundredths) 10.00% 0.00% [1]
[1] Less than 10%