Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2019

Intangible Assets, Net (Excluding Goodwill) [Abstract]

Intangible assets consist of the following:


	September 30, 2019							December 31, 2018
(In thousands)	Gross Carrying Amount		Accumulated Amortization			Net		Gross Carrying Amount		Accumulated Amortization			Net
Patents	$	2,842	$	(2,630	)	$	212	$	2,754	$	(2,533	)	$	221
Software	206		(163		)	43		206		(141		)	65
Marketing assets and customer relationships	101		(61		)	40		101		(54		)	47
Non-compete agreements	101		(101		)	—		101		(101		)	—
	$	3,250	$	(2,955	)	$	295	$	3,162	$	(2,829	)	$	333

Schedule of Amortization Expense For Intangible Assets

Amortization expense for our intangible assets in the three and nine months ended September 30, 2019 and the three and nine months ended September 30, 2018 was as follows:


	Three Months Ended September 30,				Nine Months Ended September 30,
(In thousands)	2019		2018		2019		2018
Patents	$	33	$	28	$	97	$	84
Software		7		8		22		23
Marketing assets and customer relationships		3		2		7		7
Non-compete agreements		—		—		—		5
	$	43	$	38	$	126	$	119