Goodwill and Intangible Assets - (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets

Intangible assets consist of the following (in thousands):

	Useful Life in Years	December 31,
		2017			2016
Trade name	15 - 20	$	1,208		$	1,204
Patents and know-how	5 - 12	4,113			4,090
Customer relationships	4 - 8	750			721
		6,071			6,015
Less accumulated amortization		(5,020		)	(4,532		)
		$	1,051		$	1,483

Schedule of Estimated Amortization Expense

Estimated amortization expense for existing intangible assets for each of the next five years is as follows (in thousands):

Years ending December 31:
2018	$	162
2019	$	162
2020	$	162
2021	$	162
2022	$	143
Thereafter	$	260
	$	1,051