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Software, net
9 Months Ended
Sep. 30, 2021
Capitalized Computer Software, Net [Abstract]  
Software, net
Software, net consisted of the following:
As of
September 30, 2021December 31, 2020
Software $989 $992 
Accumulated amortization(866)(849)
Software, net$123 $143 
The following reflects amortization of software included within D&A:
Three Months Ended September 30,Nine Months Ended September 30,
2021202020212020
Amortization expense$21 $25 $61 $75