Goodwill and Identified Intangible Assets (Tables)

9 Months Ended

Sep. 25, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

The changes in the carrying amount of goodwill for the nine months ended September 25, 2020 were as follows (in thousands):



	Video		Cable Access			Total
Balance as of December 31, 2019	$	178,982	$	60,798		$	239,780
Foreign currency translation adjustment, net	1,662		(17		)	1,645
Balance as of September 25, 2020	$	180,644	$	60,781		$	241,425

Summary of Goodwill and Identified Intangible Assets

The following is a summary of intangible assets, net (in thousands):



		September 25, 2020							December 31, 2019
	Weighted Average Remaining Life (Years)	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Developed core technology	n/a	$	30,657	$	(30,657	)	$	—	$	31,707	$	(30,757	)	$	950
Customer relationships/contracts	0.4	44,715		(43,459		)	1,256		44,577		(41,092		)	3,485
Trademarks and trade names	n/a	635		(635		)	—		609		(583		)	26
Maintenance agreements and related relationships	n/a	5,500		(5,500		)	—		5,500		(5,500		)	—
Order backlog	n/a	3,137		(3,137		)	—		3,085		(3,085		)	—
Total identifiable intangibles, net		$	85,694	$	(84,438	)	$	1,256	$	85,478	$	(81,017	)	$	4,461

Amortization Expense for Identifiable Purchased Intangible Assets

Amortization expense for the identifiable purchased intangible assets for the three and nine months ended September 25, 2020 and September 27, 2019 was allocated as follows (in thousands):



	Three months ended				Nine months ended
	September 25, 2020		September 27, 2019		September 25, 2020		September 27, 2019
Included in cost of revenue	$	—	$	1,295	$	950	$	3,885
Included in operating expenses	752		785		2,264		2,357
Total amortization expense	$	752	$	2,080	$	3,214	$	6,242

Estimated Future Amortization Expense of Purchased Intangible Assets

The estimated future amortization expense of purchased intangible assets with definite lives is as follows (in thousands):



	Cost of Revenue		Operating Expenses		Total
Year ended December 31,
2020 (remaining three months)	$	—	$	754	$	754
2021	—		502		502
Total future amortization expense	$	—	$	1,256	$	1,256