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Revenue
 9 Months Ended
Sep. 30, 2021
Revenue from Contract with Customer [Abstract]  
Revenue Revenue
For the three and nine months ended September 30, 2021 and 2020, the Company recognized revenue as follows:
Three Months EndedNine Months Ended
September 30,September 30,
2021202020212020
Revenue recognized over time$1,527 $1,239 $4,448 $3,696 
Revenue recognized at a point in time1,393 1,250 3,892 3,236 
Total revenue$2,920 $2,489 $8,340 $6,932 
See Note R for further disaggregation of the Company's revenue.
The Company has applied the practical expedient to exclude disclosure of remaining performance obligations as its binding orders typically have a term of one year or less.
Contract Assets
The Company recorded contract assets of $34 and $20 in prepaid and other current assets as of September 30, 2021 and December 31, 2020. During the nine months ended September 30, 2021, the Company satisfied performance obligations related to contract assets at December 31, 2020 related to customized work-in-process inventory for the Company's equipment business and also recorded new contract assets related to this business.