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Website and Software Development Costs, Net
 12 Months Ended
Dec. 31, 2021
Research and Development [Abstract]  
Website and Software Development Costs, Net Website and Software Development Costs, Net
Website and software development costs consist of the following (in thousands):
December 31,
20212020
Capitalized website and software development costs
$81,782 $64,478 
Accumulated amortization
(55,916)(46,077)
Capitalized website and software development costs, net
$25,866 $18,401 
For the years ended December 31, 2021 and 2020 total amortization expense was approximately $11.3 million and $11.2 million respectively. For the years ended December 31, 2021 and 2020 the net amount of capitalized website and software development costs written off was approximately $0 million for both periods.