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Revenue from Contracts with Customers (ASC 606) (Tables)
6 Months Ended
Jun. 30, 2022
Revenue from Contract with Customer [Abstract]  
Net Sales from Contracts with Customers
The following table summarizes net sales from contracts with customers for the three and six months ended June 30, 2022 and 2021:

Three Months EndedSix Months Ended
June 30,June 30,
2022202120222021
Mobile connectivity product, transferred at point in time$5,976 $7,292 $12,083 $13,380 
Mobile connectivity product, transferred over time644 754 1,100 1,557 
Mobile connectivity service 27,933 25,709 54,521 49,325 
Inertial navigation product6,959 9,223 14,766 20,764 
Inertial navigation service325 385 461 629 
 Total net sales$41,837 $43,363 $82,931 $85,655