INTANGIBLE ASSETS

12 Months Ended

Dec. 31, 2021

INTANGIBLE ASSETS

INTANGIBLE ASSETS

5. INTANGIBLE ASSETS

Intangible assets on the Company’s consolidated balance sheets consist of the following (in thousands):

		December 31, 2021						December 31, 2020
		Gross		Accumulated		Net Book		Gross		Accumulated		Net Book
	Life	Amount		amortization		Value		Amount		amortization		Value
Customer lists	5 - 18 years	$	94,079	$	(27,639)	$	66,440	$	69,833	$	(23,636)	$	46,197
Trade name	10 - 19 years		14,649		(5,927)		8,722		14,055		(5,061)		8,994
Design and technologies	10 - 15 years		34,241		(5,617)		28,624		15,555		(4,887)		10,668
Total		$	142,969	$	(39,183)	$	103,786	$	99,443	$	(33,584)	$	65,859

Intangible assets resulting from the 2021 acquisitions of ORMEC, ALIO and Spectrum Controls were $45,000 (Note 2). The intangible assets acquired consist of customer lists, technology, and trade names.

Total amortization expense for intangible assets for the years 2021, 2020 and 2019 was $6,245, $5,928 and $5,718, respectively.

Estimated amortization expense for intangible assets is as follows (in thousands):

	Estimated
	Amortization Expense
2022	$	9,848
2023		9,860
2024		9,532
2025		9,515
2026		9,417
Thereafter		55,614
Total estimated amortization expense	$	103,786