Annual report pursuant to Section 13 and 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
Dec. 31, 2017
Dec. 31, 2016
Property Plant And Equipment Useful Life And Values [Abstract]    
Leasehold improvements $ 4,034 $ 3,915
Furniture and equipment 6,607 5,802
Artwork 468 466
Total cost 11,109 10,183
Accumulated depreciation and amortization (8,656) (7,772)
Furniture, equipment and leasehold improvements, net $ 2,453 $ 2,411