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Capitalized Software Development Costs (Tables)
 12 Months Ended
Dec. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract]  
Summary of Capitalized Software Development Costs

Capitalized software development costs, included in other assets, non-current, were as follows (in thousands):

 

 

 

As of December 31,

 

 

 

2016

 

 

2017

 

Capitalized software development costs, gross

 

$

4,280

 

 

$

6,133

 

Less: Accumulated amortization

 

 

(1,520

)

 

 

(1,734

)

Capitalized software development costs, net

 

$

2,760

 

 

$

4,399