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Intangible Assets | 12 Months Ended
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Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangible Assets | 9. Intangible Assets The components of our purchased intangible assets as of December 31, 2022 are as follows (in thousands):
|  | Useful Lives |  | FY 2022 Annual Amortization |  |  | Gross Carrying Value |  |  | Accumulated Amortization |  |  | Net Carrying Value |  |  | Useful Lives Remaining
Customer relations |  | 15 Years |  | $ | 30 |  |  | $ | 340 |  |  | $ | 230 |  |  | $ | 110 |  |  | 4.21 Years
Developed technology |  | 7 Years |  |  | 165 |  |  |  | 1,900 |  |  |  | 272 |  |  |  | 1,628 |  |  | 6.10 Years
Trade names |  | 9 Years |  |  | 33 |  |  |  | 300 |  |  |  | 61 |  |  |  | 239 |  |  | 7.17 Years
Patents |  | Varies |  |  | — |  |  |  | 600 |  |  |  | 600 |  |  |  | — |  |  | Varies
|  |  |  | $ | 228 |  |  | $ | 3,140 |  |  | $ | 1,163 |  |  | $ | 1,977 |  |  |
The components of our purchased intangible assets as of January 1, 2022 are as follows (in thousands):
|  | Useful Lives |  | FY 2021 Annual Amortization |  |  |  | Gross Carrying Value |  |  | Accumulated Amortization |  |  | Net Carrying Value |  |  | Useful Lives Remaining
Customer relations |  | 15 Years |  | $ | 28 |  |  |  | $ | 340 |  |  | $ | 200 |  |  | $ | 140 |  |  | 5.08 Years
Developed technology |  | 7 Years |  |  | 107 |  |  | — |  |  | 900 |  |  |  | 107 |  |  |  | 793 |  |  | 6.17 Years
Trade names |  | 9 Years |  |  | 28 |  |  | — |  |  | 300 |  |  |  | 28 |  |  |  | 272 |  |  | 8.17 Years
In-process R&D |  | 7 Years |  |  | — |  |  | — |  |  | 1,000 |  |  |  | — |  |  |  | 1,000 |  |  | Not applicable
Patents |  | Varies |  |  | — |  |  |  |  | 600 |  |  |  | 600 |  |  |  | — |  |  | Varies
|  |  |  | $ | 163 |  |  |  | $ | 3,140 |  |  | $ | 935 |  |  | $ | 2,205 |  |  |
Aggregate amortization expense for fiscal years 2022 and 2021 were $228 thousand and $163 thousand, respectively. The amortization of developed technology was charged to research and development expense and the amortization of customer relations and trade names was charged to sales and marketing expense. We started amortization of in-process R&D in the fourth fiscal quarter of 2022, as it was related to the release of a new system. Estimated future amortization expense for purchased intangible assets is as follows (in thousands):
Fiscal Year: |  |  |
2023 |  | $ | 335 |
2024 |  |  | 335 |
2025 |  |  | 323 |
2026 |  |  | 319 |
2027 |  |  | 319 |
Thereafter |  |  | 346 |
Total |  | $ | 1,977 |

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -URI https://asc.fasb.org/subtopic&trid=2144471 + Details
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