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Intangible Assets, net
6 Months Ended
Jun. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets, net Intangible Assets, net
Intangible assets consist as of June 30, 2021 and December 31, 2020 of the following:
Amortization
Period in
Years
June 30, 2021December 31, 2020
Patents20$1,557 $1,293 
Other indefinite lived intangible assets310 310 
Total intangible assets, cost1,867 1,603 
Less: accumulated amortization(50)(39)
Intangible assets, net$1,817 $1,564 
Amortization expense of intangible assets was $7 and $4 for the three months ended June 30, 2021 and 2020, respectively. Amortization expense of intangible assets was $11 and $8 for the six months ended June 30, 2021 and 2020, respectively.