Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets Activity Summary - Indefinite-lived

Intangible assets are summarized as follows (in thousands):

	March 31, 2021						December 31, 2020
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Amortized intangible assets
Patents and know how	$	9,516	$	(5,899)	$	3,617	$	9,510	$	(5,730)	$	3,780
Licenses	1,414		(1,369)		45		1,414		(1,334)		80
Customer and supplier relationships	241		(176)		65		241		(172)		69
Non-compete agreements	120		(105)		15		120		(98)		22
Total amortized intangible assets	$	11,291	$	(7,549)	$	3,742	$	11,285	$	(7,334)	$	3,951
Unamortized intangible assets
Trade names and trademarks	$	1,008			$	1,008	$	1,008			$	1,008
Patents in process	1,168				1,168		1,045				1,045
Total intangible assets	$	13,467			$	5,918	$	13,338			$	6,004

Intangible Assets Activity Summary - Finite-lived

Intangible assets are summarized as follows (in thousands):

	March 31, 2021						December 31, 2020
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Amortized intangible assets
Patents and know how	$	9,516	$	(5,899)	$	3,617	$	9,510	$	(5,730)	$	3,780
Licenses	1,414		(1,369)		45		1,414		(1,334)		80
Customer and supplier relationships	241		(176)		65		241		(172)		69
Non-compete agreements	120		(105)		15		120		(98)		22
Total amortized intangible assets	$	11,291	$	(7,549)	$	3,742	$	11,285	$	(7,334)	$	3,951
Unamortized intangible assets
Trade names and trademarks	$	1,008			$	1,008	$	1,008			$	1,008
Patents in process	1,168				1,168		1,045				1,045
Total intangible assets	$	13,467			$	5,918	$	13,338			$	6,004

Amortization expense for the three and three months ended March 31, 2021 and 2020 is summarized in the table below (amounts in thousands):

	Three Months Ended March 31,
	2021		2020
Amortization expense	$	239	$	271

Estimated Future Amortization Expense for Intangible Assets

Expected future amortization of intangible assets as of March 31, 2021, is as follows (in thousands):

Year ending December 31,	Estimated Amortization Expense
2021 (excluding the three months ended March 31, 2021)	$	579
2022	692
2023	692
2024	692
2025	280
Thereafter	807
	$	3,742