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Intangible Assets (Tables) | 12 Months Ended
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Dec. 28, 2019
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Finite-Lived Intangible Assets | The following tables summarize the details of our Intangible assets, net as of December 28, 2019 and December 29, 2018:
|  | December 28, 2019
(In thousands) |  | Weighted Average Amortization Period (in years) |  | Gross |  | Accumulated Amortization |  | Intangible assets, net
Developed technology |  | 5.0 |  | $ | 110,987 |  |  | $ | (105,594 | ) |  | $ | 5,393 |
Customer relationships |  | 5.8 |  | 22,934 |  |  | (21,400 | ) |  | 1,534 |
Licensed technology |  | 5.0 |  | 459 |  |  | (409 | ) |  | 50 |
Total identified intangible assets |  |  |  | $ | 134,380 |  |  | $ | (127,403 | ) |  | $ | 6,977 |
|  | December 29, 2018
(In thousands) |  | Weighted Average Amortization Period (in years) |  | Gross |  | Accumulated Amortization |  | Intangible assets, net
Developed technology |  | 5.0 |  | $ | 110,987 |  |  | $ | (94,389 | ) |  | $ | 16,598 |
Customer relationships |  | 5.8 |  | 22,934 |  |  | (19,048 | ) |  | 3,886 |
Licensed technology |  | 5.0 |  | 1,194 |  |  | (353 | ) |  | 841 |
Total identified intangible assets |  |  |  | $ | 135,115 |  |  | $ | (113,790 | ) |  | $ | 21,325 |
Finite-lived Intangible Assets Amortization Expense | We recorded amortization expense related to intangible assets on the Consolidated Statements of Operations as presented in the following table:
| Year Ended
(In thousands) | December 28, 2019 |  | December 29, 2018 |  | December 30, 2017
Research and development | $ | 55 |  |  | $ | 277 |  |  | $ | 569 |
Amortization of acquired intangible assets | 13,558 |  |  | 17,690 |  |  | 31,340 |
| $ | 13,613 |  |  | $ | 17,967 |  |  | $ | 31,909 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense | The annual expected amortization expense of acquired intangible assets is as follows:
(In thousands) | Amount
2020 | $ | 4,500 |
2021 | 2,239 |
2022 | 238 |
Total | $ | 6,977 |

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