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Software Development Costs
 12 Months Ended
Dec. 31, 2018
Software Development Costs [Abstract]  
Software Development Costs
9.  Software Development Costs

Software development costs, net consist of the following:

(in thousands)
 
December 31,
 
  
2018
  
2017
 
Beginning balance
 
$
690
  
$
982
 
Additions
  
432
   
177
 
Amortization
  
(507
)
  
(469
)
Ending balance
 
$
615
  
$
690
 
         

Software development costs capitalized were $0.4 million and $0.2 million for the years ended December 31, 2018 and 2017, respectively.  Amortization of capitalized software development costs were $507,000 and $469,000 for the years ended December 31, 2018 and 2017, respectively, and were included in cost of revenue in the consolidated statements of operations.