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Intangible Assets | 12 Months Ended
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Jan. 02, 2021
Goodwill And Intangible Assets Disclosure [Abstract] |
Intangible Assets | 7. Intangible Assets The components of our purchased intangible assets as of January 2, 2021 are as follows (in thousands):
|  | Useful Lives |  | FY 2020 Annual Amortization |  |  | Gross Carrying Value |  |  | Accumulated Amortization |  |  | Net Carrying Value |  |  | Useful Lives Remaining
Customer relations |  | 15 Years |  | $ | 16 |  |  | $ | 240 |  |  | $ | 172 |  |  | $ | 68 |  |  | 4.25 Years
Patents |  | Varies |  |  | — |  |  |  | 600 |  |  |  | 600 |  |  |  | — |  |  | Varies
|  |  |  | $ | 16 |  |  | $ | 840 |  |  | $ | 772 |  |  | $ | 68 |  |  |
The components of our purchased intangible assets as of December 28, 2019 are as follows (in thousands):
|  | Useful Lives |  | FY 2019 Annual Amortization |  |  | Gross Carrying Value |  |  | Accumulated Amortization |  |  | Net Carrying Value |  |  | Useful Lives Remaining
Customer relations |  | 15 Years |  | $ | 16 |  |  | $ | 240 |  |  | $ | 156 |  |  | $ | 84 |  |  | 5.25 Years
Patents |  | Varies |  |  | — |  |  |  | 600 |  |  |  | 600 |  |  |  | — |  |  | Varies
|  |  |  | $ | 16 |  |  | $ | 840 |  |  | $ | 756 |  |  | $ | 84 |  |  |
Aggregate amortization expense for each of the fiscal years 2020 and 2019 was $16 thousand. The amortization of customer relations was charged to sales and marketing expense. Estimated future amortization expense for purchased intangible assets is as follows (in thousands):
Fiscal Year: |  |  |  |
2021 |  | $ | 16 |
2022 |  |  | 16 |
2023 |  |  | 16 |
2024 |  |  | 16 |
2025 |  |  | 4 |
Total |  | $ | 68 |

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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