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Assets Manufactured for Internal Use, net
 12 Months Ended
Dec. 31, 2017
Assets Manufactured for Internal Use, net  
Assets Manufactured for Internal Use, net

Note 7. Assets Manufactured for Internal Use, net

 

The components of assets manufactured for internal use, included in amounts reported as other assets, are as follows:

 

 

 

 

 

 

 

 

 

 

 

December 31,

 

 

    

2017

    

2016

 

 

 

(in thousands)

 

Internal use assets

 

$

40,366

 

$

42,776

 

Construction in process

 

 

301

 

 

1,745

 

Total cost

 

 

40,667

 

 

44,521

 

Accumulated depreciation

 

 

(20,035)

 

 

(22,838)

 

Assets manufactured for internal use, net

 

$

20,632

 

$

21,683

 

 

These products are used for research and development, training, and customer demonstration purposes.

 

Depreciation expense was $2.8 million, $2.4 million and $2.5 million for the years ended December 31, 2017, 2016 and 2015, respectively.