Intangible Assets

3 Months Ended

Mar. 30, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

10. Intangible Assets

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



	March 30, 2019			December 29, 2018
Patents	$	21,889		$	21,323
Customer relationships	7,669			7,669
Licenses-related party	7,500			7,500
Acquired technology	5,580			5,580
Trademarks	4,273			4,190
Capitalized software development costs	3,436			3,430
Other	5,466			5,466
Total intangible assets	55,813			55,158
Accumulated amortization	(27,983		)	(27,234		)
Intangible assets, net	$	27,830		$	27,924

Total amortization expense for the three months ended March 30, 2019 and March 31, 2018 was $1.1 million and $1.2 million, respectively. All of these intangible assets have a 10 year weighted average amortization period.

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



Fiscal year	Amount
2019 (balance of year)	$	4,283
2020	3,805
2021	3,688
2022	2,636
2023	1,747
Thereafter	11,671
Total	$	27,830