Annual report pursuant to Section 13 and 15(d)

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

v3.20.4
Furniture, Equipment and Leasehold Improvements, Net - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Property Plant And Equipment [Line Items]      
Depreciation and amortization $ 1,117 $ 978 $ 747
Leased assets write off 209 310  
Accumulated depreciation 10,190 $ 8,811  
Leased Assets      
Property Plant And Equipment [Line Items]      
Accumulated depreciation $ 180