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Equipment and Leasehold Improvements
12 Months Ended
Dec. 31, 2020
Property, Plant and Equipment [Abstract]  
Equipment and Leasehold Improvements
(7)Equipment and Leasehold Improvements

 

   December 31, 
   2020   2019 
Equipment  $51,060   $37,743 
Leasehold improvements   1,989    1,760 
    53,049    39,503 
Less accumulated depreciation and amortization   33,469    28,396 
   $19,580   $11,107 

 

Depreciation and amortization expense was $3.8 million, $3.7 million and $4.1 million in 2020, 2019, and 2018, respectively.