Intangibles (Tables)

6 Months Ended

Jun. 30, 2019

Goodwill And Intangible Assets Disclosure [Abstract]

Amortization of Intangible Assets Acquired

Amortization of intangible assets acquired is calculated using the straight-line method over the estimated useful lives of the assets.

	Estimated Life	June 30,			December 31,
	(years)	2019			2018
Capitalized patent costs	17-20	$	9,084		$	8,757
Intangible assets acquired:
Purchased patents and intellectual property	3-10		250			250
Existing technology	5		1,560			1,560
Customer relationships	7		290			290
Backlog	2		760			760
Tradenames	3		290			290
Non-solicitation agreements	1		120			120
Gross intangible assets			12,354			12,027
Accumulated amortization			(5,655	)		(5,378	)
Intangibles, net		$	6,699		$	6,649