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Summary of Significant Accounting Policies - Schedule of Property and Equipment Useful Lives (Detail)
12 Months Ended
Dec. 31, 2013
Minimum [Member] | Computer equipment [Member]
 
Significant Accounting Policies [Line Items]  
Useful lives of property and equipment 3 years
Minimum [Member] | Office furniture and equipment [Member]
 
Significant Accounting Policies [Line Items]  
Useful lives of property and equipment 5 years
Minimum [Member] | Leasehold improvements [Member]
 
Significant Accounting Policies [Line Items]  
Useful lives of property and equipment 5 years
Maximum [Member] | Computer equipment [Member]
 
Significant Accounting Policies [Line Items]  
Useful lives of property and equipment 5 years
Maximum [Member] | Office furniture and equipment [Member]
 
Significant Accounting Policies [Line Items]  
Useful lives of property and equipment 7 years
Maximum [Member] | Leasehold improvements [Member]
 
Significant Accounting Policies [Line Items]  
Useful lives of property and equipment 7 years