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
9 Months Ended
Sep. 30, 2015
Dec. 31, 2014
Property, Plant and Equipment [Line Items]    
Total property and equipment $ 188 $ 94
Less: Accumulated depreciation (59) (42)
Property and equipment, net 129 52
Computer Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Total property and equipment $ 13 13
Useful Life (Years) 3 years  
Furniture and Fixtures [Member]    
Property, Plant and Equipment [Line Items]    
Total property and equipment $ 69 69
Useful Life (Years) 5 years  
Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Total property and equipment $ 12 12
Useful Life (Years) 5 years  
Construction in Progress [Member]    
Property, Plant and Equipment [Line Items]    
Total property and equipment $ 94 $ 0