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Goodwill and Intangible Assets, Net
 3 Months Ended
Mar. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets, Net Goodwill and Intangible Assets, Net
The changes in the carrying amount of goodwill for the three months ended March 31, 2021 were as follows:
Balance at December 31, 2020$54,363 
Foreign currency translation adjustments(125)
Balance at March 31, 2021$54,238 
The Company had $43,643 of cumulative impairment losses as of March 31, 2021 and December 31, 2020.
Intangible assets consist of the following as of March 31, 2021:
Gross Carrying AmountAccumulated AmortizationNet
Patents, developed technologies and know-how$93,691 $(34,946)$58,745 
Customer relationships10,850 (9,568)1,282 
Trademarks5,900 (4,697)1,203 
Total$110,441 $(49,211)$61,230 
Intangible assets consist of the following as of December 31, 2020:
Gross Carrying AmountAccumulated AmortizationNet
Patents, developed technologies and know-how$96,927 $(34,412)$62,515 
Customer relationships10,850 (9,340)1,510 
Trademarks5,900 (4,529)1,371 
Total$113,677 $(48,281)$65,396 
Amortization expense was $1,930 and $1,879 for the three months ended March 31, 2021 and 2020, respectively.