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Equipment and Furnishings
 12 Months Ended
Dec. 31, 2017
Equipment and Furnishings [Abstract]  
Equipment and Furnishings
6. Equipment and Furnishings
Equipment and furnishings at December 31, 2017 and 2016 consist of the following (in thousands):
  
2017
  
2016
 
Equipment and furnishings
 
$
2,212
  
$
2,811
 
Less — accumulated depreciation
  
(1,169
)
  
(851
)
Equipment and furnishings, net
 
$
1,043
  
$
1,960
 
         
Depreciation and amortization expense for the years ended December 31, 2017, 2016 and 2015 were $629,312, $536,631 and $317,649, respectively.