Intangible Assets

9 Months Ended

Sep. 26, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

9. Intangible Assets

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


	September 26, 2020		December 28, 2019
Patents	$	28,286	$	23,242
Customer relationships	23,619		7,669
Acquired technologies	12,176		5,580
Trademarks	9,507		4,614
Licenses-related party	7,500		7,500
Capitalized software development costs	3,366		3,328
Other	7,073		5,466
Total intangible assets	91,527		57,399
Accumulated amortization	(34,221)		(30,148)
Intangible assets, net	$	57,306	$	27,251

Intangible assets have a weighted-average amortization period of twelve years. Total amortization expense for the three months ended September 26, 2020 and September 28, 2019 was $1.6 million and $1.1 million, respectively. Total amortization expense for the nine months ended September 26, 2020 and September 28, 2019 was $5.2 million and $3.3 million, respectively.

Total renewal costs for patents and trademarks for the three months ended September 26, 2020 and September 28, 2019 were $0.6 million and $0.7 million, respectively. Total renewal costs for patents and trademarks for the nine months ended September 26, 2020 and September 28, 2019 were $1.2 million and $1.1 million, respectively. As of September 26, 2020, the weighted-average number of years until the next renewal was two years for patents and five years for trademarks.

During the three months ended March 28, 2020, the Company completed an immaterial business combination. Based on the Company’s preliminary 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 three months ended June 27, 2020, the Company completed another immaterial business combination. Based on the Company’s preliminary 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.

The Company is still gathering additional information to finalize these preliminary estimates and expects to finalize the purchase price allocations as soon as practicable, but no later than one year from the acquisition dates.

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


Fiscal year	Amount
2020 (balance of year)	$	7,083
2021	7,011
2022	5,691
2023	5,243
2024	4,880
Thereafter	27,398
Total	$	57,306