Quarterly report pursuant to Section 13 or 15(d)

Property and Equipment - Components of Property and Equipment (Detail)

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Property and Equipment - Components of Property and Equipment (Detail) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2013
Dec. 31, 2012
Property, Plant and Equipment [Line Items]    
Total property and equipment $ 545 $ 54
Less: Accumulated depreciation (10) (3)
Property and equipment, net 535 51
Construction in Progress [Member]
   
Property, Plant and Equipment [Line Items]    
Total property and equipment 451  
Computer Equipment [Member]
   
Property, Plant and Equipment [Line Items]    
Total property and equipment 12 10
Useful Life (Years) 3 years  
Furniture and Fixtures [Member]
   
Property, Plant and Equipment [Line Items]    
Total property and equipment 70 38
Useful Life (Years) 5 years  
Leasehold Improvements [Member]
   
Property, Plant and Equipment [Line Items]    
Total property and equipment $ 12 $ 6
Useful Life (Years) 5 years