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Goodwill
 12 Months Ended
Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill
Goodwill
On December 31, 2018, the Company completed the annual reviews of the carrying value of goodwill in its E&P Technology & Services and Optimization Software & Services reporting units and noted no impairments. The qualitative assessment concluded it was more likely than not that the fair values of the Company’s E&P Technology & Services and Optimization Software & Services reporting units exceeded their carrying values.
The following is a summary of the changes in the carrying amount of goodwill for the years ended December 31, 2018 and 2017 (in thousands):
 
E&P Technology & Services
 
Optimization Software & Services
 
Total
Balance at January 1, 2017
$
2,943

 
$
19,265

 
$
22,208

Impact of foreign currency translation adjustments
—

 
1,881

 
1,881

Balance at December 31, 2017
2,943

 
21,146

 
24,089

Impact of foreign currency translation adjustments
—

 
(1,174
)
 
(1,174
)
Balance at December 31, 2018
$
2,943

 
$
19,972

 
$
22,915