Fixed Assets - Schedule of Fixed Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Less accumulated depreciation and amortization	$ (1,978)	$ (972)
Total	11,974	10,356
Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	1,258	913
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	2,382	1,620
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	$ 10,312	$ 8,795