Intangible Assets

6 Months Ended

Jun. 27, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

9. Intangible Assets

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



	June 27, 2020			December 28, 2019
Patents	$	27,527		$	23,242
Customer relationships	23,605			7,669
Acquired technologies	11,943			5,580
Trademarks	9,218			4,614
Licenses-related party	7,500			7,500
Capitalized software development costs	3,406			3,328
Other	7,060			5,466
Total intangible assets	90,259			57,399
Accumulated amortization	(32,907		)	(30,148		)
Intangible assets, net	$	57,352		$	27,251

Intangible assets have a twelve years weighted-average amortization period. Total amortization expense for the three months ended June 27, 2020 and June 29, 2019 was $2.1 million and $1.1 million, respectively. Total amortization expense for the six months ended June 27, 2020 and June 29, 2019 was $3.5 million and $2.2 million, respectively.

Total renewal costs for patents and trademarks for the three months ended June 27, 2020 and June 29, 2019 were $0.3 million and $0.1 million, respectively. Total renewal costs for patents and trademarks for the six months ended June 27, 2020 and June 29, 2019 were $0.5 million and $0.4 million, respectively. As of June 27, 2020, the weighted-average number of years until the next renewal was one year for patents and six 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)	$	6,977
2021	7,106
2022	5,688
2023	5,151
2024	4,783
Thereafter	27,647
Total	$	57,352