Segment Reporting (Tables)

3 Months Ended

Mar. 31, 2017

Segment Reporting [Abstract]

Schedule of operations by geographic segment

Net sales and operating earnings (loss) for the Company's reporting segments and the Company's loss before income tax expense (benefit) for the three months ended March 31, 2017 and 2016 were as follows:

	For the three months ended March 31,
	2017			2016
Net sales:
Mobile connectivity	$	34,287		$	35,265
Inertial navigation	5,924			5,115
Consolidated net sales	$	40,211		$	40,380
Operating earnings (loss):
Mobile connectivity	$	622		$	1,990
Inertial navigation	(44		)	(927		)
Subtotal	578			1,063
Unallocated, net	(5,048		)	(4,437		)
Loss from operations	(4,470		)	(3,374		)
Net interest and other expense	(255		)	(347		)
Loss before income tax expense (benefit)	$	(4,725	)	$	(3,721	)

Depreciation expense and amortization expense for the Company's segments are presented in the following table for the periods presented:

	For the three months ended March 31,
	2017	2016
Depreciation expense:
Mobile connectivity	1,478	1,659
Inertial navigation	195	224
Unallocated	20	24
Total consolidated depreciation expense	1,693	1,907
Amortization expense:
Mobile connectivity	1,068	1,283
Inertial navigation	—	—
Unallocated	—	—
Total consolidated amortization expense	1,068	1,283