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Equipment and Leasehold Improvements - Schedule of Equipment and Leasehold Improvements, Net (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Equipment and Leasehold Improvements, Net    
Total $ 36,049 $ 29,863
Less accumulated depreciation and amortization (22,057) (17,132)
Equipment and leasehold improvements, net 13,992 12,731
Office Equipment    
Equipment and Leasehold Improvements, Net    
Total 13,593 11,517
Furniture and Fixtures    
Equipment and Leasehold Improvements, Net    
Total 5,054 4,533
Leasehold Improvements    
Equipment and Leasehold Improvements, Net    
Total $ 17,402 $ 13,813