Intangible Assets

3 Months Ended

Mar. 28, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

9. Intangible Assets

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



	March 28, 2020			December 28, 2019
Patents	$	26,332		$	23,242
Customer relationships	23,219			7,669
Licenses-related party	7,500			7,500
Trademarks	6,591			4,614
Acquired technology	5,580			5,580
Capitalized software development costs	3,328			3,328
Other	5,466			5,466
Total intangible assets	78,016			57,399
Accumulated amortization	(31,277		)	(30,148		)
Intangible assets, net	$	46,739		$	27,251

Intangible assets have a twelve year weighted-average amortization period. Total amortization expense for the three months ended March 28, 2020 and March 30, 2019 was $1.4 million and $1.1 million, respectively.

Total renewal costs for patents and trademarks for the three months ended March 28, 2020 and March 30, 2019 were $0.2 million and $0.3 million, respectively. As of March 28, 2020, the weighted-average number of years until the next renewal was one year for patents and five years for trademarks.

During the three months ended March 28, 2020, the Company completed a 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 has been assigned to customer relationships, acquired technology and trademarks, respectively. The Company is still gathering additional information to finalize these preliminary estimates and expects to finalize the purchase price allocation as soon as practicable, but no later than one year from the acquisition date.

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



Fiscal year	Amount
2020 (balance of year)	$	5,716
2021	5,940
2022	4,866
2023	4,043
2024	3,653
Thereafter	22,521
Total	$	46,739