Intangible Assets

9 Months Ended

Sep. 29, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

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



	September 29, 2018			December 30, 2017
Patents	$	20,924		$	20,623
Customer relationships	7,669			7,669
Licenses-related party	7,500			7,500
Acquired technology	5,580			5,580
Trademarks	4,234			4,036
Capitalized software development costs	3,374			2,699
Other	5,466			3,691
Total intangible assets	54,747			51,798
Accumulated amortization	(26,285		)	(24,675		)
Intangible assets, net	$	28,462		$	27,123

Total amortization expense for each of the three months ended September 29, 2018 and September 30, 2017 was $1.1 million. Total amortization expense for the nine months ended September 29, 2018 and September 30, 2017 was $3.5 million and $3.2 million, respectively. All of these intangible assets have a 10 year weighted average amortization period.

Estimated amortization expense for future fiscal years is as follows (in thousands):



Fiscal year	Amount
2018 (balance of year)	$	4,411
2019	3,959
2020	3,714
2021	3,333
2022	1,854
Thereafter	11,191
Total	$	28,462