Intangible Assets

12 Months Ended

Jan. 01, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

9. Intangible Assets, net

Intangible assets, net, consist of the following (in thousands):


	January 1, 2022		January 2, 2021
Gross carrying amount
Patents	$	31,513	$	26,875
Acquired technologies	28,371		29,039
Customer relationships	24,624		24,666
Trademarks	12,210		11,708
Licenses	8,108		5,108
Licenses-related party	7,500		7,500
Other	6,203		5,693
Total gross carrying amount	$	118,529	$	110,589
Accumulated amortization
Patents	$	(13,222)	$	(10,763)
Acquired technologies	(7,668)		(5,259)
Customer relationships	(7,381)		(6,486)
Trademarks	(6,127)		(3,999)
Licenses-related party	(5,969)		(5,594)
Licenses	(1,975)		(1,247)
Other	(3,685)		(3,318)
Total accumulated amortization	(46,027)		(36,666)
Net carrying amount	$	72,502	$	73,923

Intangible assets have a weighted-average amortization period of twelve years. For the years ended January 1, 2022, January 2, 2021 and December 28, 2019, amortization of intangible assets was $10.3 million, $7.5 million and $4.4 million, respectively.

As of January 1, 2022 and January 2, 2021, the total costs of patents not yet amortizing was $9.0 million and $8.2 million, respectively. As of January 1, 2022 and January 2, 2021, the total costs of trademarks not yet amortizing was $1.0 million and $0.9 million, respectively.

For the years ended January 1, 2022 and January 2, 2021, total renewal costs capitalized for patents and trademarks was $1.5 million and $1.3 million, respectively. As of January 1, 2022, the weighted-average number of years until the next renewal was two years for patents and three years for trademarks.

During the first quarter of 2020, the Company completed an immaterial business combination. Based on the Company’s purchase price allocation, approximately $15.5 million, $2.6 million and $1.7 million of the purchase price was assigned to customer relationships, acquired technologies and trademarks, respectively.

During the second quarter of 2020, the Company completed another immaterial business combination. Based on the Company’s purchase price allocation, approximately $6.3 million, $2.4 million, $0.4 million and $0.3 million of the purchase price was assigned to acquired technologies, trademarks, customer relationships and other intangibles, respectively.

During the fourth quarter of 2020, the Company obtained a controlling interest in a provider of advanced hemodynamic monitoring solutions. Based on the Company’s purchase price allocation, approximately $14.0 million, $2.3 million, $1.0 million and $1.0 million of the purchase price was assigned to acquired technologies, trademarks, customer relationships and other intangibles, respectively. Subsequently, during the first quarter of 2021, the Company acquired the remaining minority interest. See Note 14 to these consolidated financial statements for further details.

Estimated amortization expense for each of the next fiscal years is as follows (in thousands):


Fiscal year	Amount
2022	$	8,242
2023	8,138
2024	7,674
2025	6,864
2026	5,930
Thereafter	35,654
Total	$	72,502