Revenue from Contracts with Customers (ASC 606) Disaggregation of Revenue (Tables)

3 Months Ended

Mar. 31, 2019

Disaggregation of Contract Revenue with a Customer [Abstract]

Disaggregation of Revenue

The following table summarizes net sales from contracts with customers for the three months ended March 31, 2019 and 2018:

	Three Months Ended
	March 31,
	2019		2018
Mobile connectivity product, transferred at point in time	$	5,677	$	6,670
Mobile connectivity product, transferred over time	1,385		1,250
Mobile connectivity service	25,448		24,829
Inertial navigation product	5,812		6,072
Inertial navigation service	1,650		1,280
Total net sales	$	39,972	$	40,101