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Summary of Significant Accounting Policies (Details) (USD $)
3 Months Ended 52 Months Ended
Mar. 31, 2013
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Mar. 31, 2013
Dec. 31, 2012
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Concentration of Credit Risk      
Amount of financial instruments with off-balance-sheet risk $ 0 $ 0 $ 0
Segment and Geographical Information      
Number of operating segments 1    
Impairment of Long-Lived Assets      
Impairment of long-lived assets   $ 0  
Stock-Based Compensation      
Number of stock-based employee compensation plans     1
Computer equipment
     
Property and Equipment      
Estimated useful life 2 years    
Furniture and fixtures
     
Property and Equipment      
Estimated useful life 5 years