Intangible assets (Tables)

12 Months Ended

Dec. 31, 2020

Intangible assets [Abstract]

Identifiable intangible assets

Identifiable intangible assets are recorded in Intangible assets in the accompanying Consolidated Balance Sheets and are comprised of the following:

	December 31,
	2020					2019
(In thousands)	Gross Amount		Accumulated Amortization			Gross Amount		Accumulated Amortization
Purchased technology	$	2,526	$	(1,975	)	$	2,526	$	(1,792	)
Customer relationships		1,300		(1,300	)		1,300		(1,300	)
Trademark		480		(450	)		480		(402	)
Covenant not to compete		146		(146	)		146		(146	)
Patents		56		(54	)		56		(51	)
Other		80		(80	)		80		(80	)
Total	$	4,588	$	(4,005	)	$	4,588	$	(3,771	)