GOODWILL AND INTANGIBLE ASSETS (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of detail and activity of goodwill by segment

Detail and activity of goodwill by segment is presented below (in thousands):

	MMS			ATA			Total
Goodwill	$	32,434		$	6,620		$	39,054
Accumulated impairment losses	(32,434		)	—			(32,434		)
Balance at December 31, 2015	—			6,620			6,620
Currency translation adjustments	—			(41		)	(41		)
Goodwill	32,434			6,579			39,013
Accumulated impairment losses	(32,434		)	—			(32,434		)
Balance at December 31, 2016	—			6,579			6,579
Currency translation adjustments	—			98			98
Goodwill	32,434			6,677			39,111
Accumulated impairment losses	(32,434		)	—			(32,434		)
Balance at December 31, 2017	$	—		$	6,677		$	6,677

Summary of the major components of intangible assets other than goodwill

The major components of intangible assets other than goodwill are as follows (in thousands):

	December 31, 2017			December 31, 2016
Gross amortizable intangible assets:
Technical know-how	$	12,997		$	12,944
Customer lists	9,026			8,981
Land rights	2,667			2,498
Patents, trade names, drawings, and other	4,420			4,356
Total gross amortizable intangible assets	29,110			28,779
Accumulated amortization:
Technical know-how	(8,067		)	(7,438		)
Customer lists	(2,204		)	(1,744		)
Land rights	(378		)	(304		)
Patents, trade names, drawings, and other	(3,670		)	(3,490		)
Total accumulated amortization	(14,319		)	(12,976		)
Amortizable intangible assets, net	14,791			15,803
Indefinite lived intangible assets:
Trade names	11,595			10,927
Intangible assets other than goodwill, net	$	26,386		$	26,730

Schedule of finite-lived intangible asset amortization expense

Amortization expense related to the definite-lived intangible assets are as follows (in thousands):

	Year Ended December 31,
	2017		2016		2015
Amortization expense	$	1,250	$	1,282	$	1,804

Schedule of finite-lived intangible assets, future amortization expense

Estimated amortization expense for each of the five succeeding fiscal years and thereafter is as follows (in thousands):

Fiscal Year	Future Estimated Amortization
2018	$	1,107
2019	1,089
2020	1,045
2021	1,027
2022	1,015
Thereafter	9,508