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Revenue (Tables)
3 Months Ended
Mar. 31, 2021
Revenue from Contract with Customer [Abstract]  
Summary of Sales from Contracts with Customers Disaggregated by Categories
The following table presents the Company’s sales from contracts with customers disaggregated by categories which best represents how the nature, amount and timing and uncertainty of sales are affected by economic factors.
Three Months Ended March 31,
20212020
Revenue by customer
Related party
$6,939 $5,484 
Commercial
1,378 1,482 
Total Revenue by customer
$8,317 $6,966 
Revenue by contract type
Fixed-price
$1,732 $1,888 
Cost-plus
4,290 3,434 
Time and Material
2,295 1,644 
Total Revenue by contract type
$8,317 $6,966