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Revenue from Contracts with Customers (ASC 606) (Tables)
12 Months Ended
Dec. 31, 2021
Revenue from Contract with Customer [Abstract]  
Disaggregation of Revenue
The following table summarizes net sales from contracts with customers for the years ended December 31, 2021 and 2020:

Year Ended
December 31,
20212020
Mobile connectivity product, transferred at point in time$27,490 $25,140 
Mobile connectivity product, transferred over time2,522 2,723 
Mobile connectivity service 103,899 91,590 
Inertial navigation product36,858 36,756 
Inertial navigation service998 2,524 
   Total net sales$171,767 $158,733