Quarterly report pursuant to Section 13 or 15(d)

Furniture, Equipment and Leasehold Improvements, Net - Summary of Furniture, Equipment and Leasehold Improvements, Net (Detail)

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Furniture, Equipment and Leasehold Improvements, Net - Summary of Furniture, Equipment and Leasehold Improvements, Net (Detail) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Property Plant And Equipment Useful Life And Values [Abstract]    
Leasehold improvements $ 4,074 $ 4,034
Furniture and equipment 6,568 6,607
Artwork 468 468
Total cost 11,110 11,109
Accumulated depreciation and amortization (8,691) (8,656)
Furniture, equipment and leasehold improvements, net $ 2,419 $ 2,453