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Summary of Preferred Stock Issued (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Series E Preferred Stock
 
Class Of Stock [Line Items]  
Issue Date Mar. 14, 2012
Gross Amount $ 86,843
Shares 11,486,999
Series E One Preferred Stock
 
Class Of Stock [Line Items]  
Issue Date Mar. 14, 2012
Gross Amount 11,542
Shares 1,586,778 [1]
Series E Two Preferred Stock
 
Class Of Stock [Line Items]  
Issue Date Mar. 14, 2012
Gross Amount $ 17,275
Shares 2,284,960
[1] All shares were issued as purchase consideration for ID Analytics.