Quarterly report pursuant to Section 13 or 15(d)

Furniture, Equipment and Leasehold Improvements, Net - Additional Information (Detail)

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Furniture, Equipment and Leasehold Improvements, Net - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Property Plant And Equipment Useful Life And Values [Abstract]    
Depreciation expense $ 137us-gaap_Depreciation $ 121us-gaap_Depreciation