Intangible Assets

3 Months Ended

Mar. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets

Intangible Assets

Intangible assets are summarized as follows (in thousands):

	March 31, 2020							December 31, 2019
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Amortized intangible assets
Licenses	$	1,414	$	(1,234	)	$	180	$	1,414	$	(1,200	)	$	214
Patents and know how	9,108		(5,232		)	3,876		9,099		(5,070		)	4,029
Customer and supplier relationships	3,761		(2,485		)	1,276		3,761		(2,417		)	1,344
Non-compete agreements	120		(75		)	45		120		(68		)	52
Total amortized intangible assets	$	14,403	$	(9,026	)	$	5,377	$	14,394	$	(8,755	)	$	5,639
Unamortized intangible assets
Trade names and trademarks	$	1,008				$	1,008	$	1,008				$	1,008
Patents in process	1,196					1,196		1,130					1,130
Total intangible assets	$	16,607				$	7,581	$	16,532				$	7,777

Amortization expense for the three months ended March 31, 2020 and 2019, was approximately $0.3 million and $0.2 million, respectively.

Expected future amortization of intangible assets as of March 31, 2020, is as follows (in thousands):

Year ending December 31,	Estimated Amortization Expense
2020 (excluding the three months ended March 31, 2020)	$	739
2021	978
2022	955
2023	955
2024	955
Thereafter	795
	$	5,377