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Intangible Assets
3 Months Ended
Mar. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets Intangible Assets
Gross carrying amounts and accumulated amortization of finite-lived intangible assets by major class were as follows:
    
 March 31, 2023December 31, 2022
 GrossAccumulated amortizationNetGrossAccumulated amortizationNet
Customer relationships$1,375 $(577)$798 $1,356 $(542)$814 
Trade names534 (112)422 530 (106)424 
Technology158 (115)43 157 (109)48 
Long term supply contracts156 (84)72 146 (76)70 
Patents11 (9)11 (9)
$2,234 $(897)$1,337 $2,200 $(842)$1,358 

Amortization expense was $40 for the three months ended March 31, 2023 and 2022.