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PURCHASED INTANGIBLE ASSETS
 3 Months Ended
Mar. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]  
PURCHASED INTANGIBLE ASSETS PURCHASED INTANGIBLE ASSETS
 
Our purchased intangible assets consisted of the following as of March 31, 2020:
GrossAccumulated
Amortization		Net
Core technology$17,098  $(11,899) $5,199  
Customer relationships35,865  (35,865) —  
Trademarks / Trade names1,942  (1,942) —  
Total intangible assets$54,905  $(49,706) $5,199  
 
Our purchased intangible assets consisted of the following as of December 31, 2019:
GrossAccumulated
Amortization		Net
Core technology$17,717  $(11,837) $5,880  
Customer relationships35,091  (35,091) —  
Trademarks / Trade names1,988  (1,988) —  
Total intangible assets$54,796  $(48,916) $5,880  
 
The change in the gross value of our purchased intangible assets from December 31, 2019 to March 31, 2020 was due to foreign currency translation and an adjustment due to the recognition of tax benefit of tax amortization previously applied to certain goodwill related to the NobelClad and DynaEnergetics reporting units. After the goodwill was written off at September 30, 2017 and December 31, 2015, respectively, the tax amortization reduces other noncurrent intangible assets related to the historical acquisition.