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Intangible Assets - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jul. 04, 2021 | Jun. 28, 2020 | Jul. 04, 2021 | Jun. 28, 2020 | Dec. 31, 2020 | May 26, 2020
Distribution Rights, Developed Technology Rights, Customer Contracts And Relationships, Other Intangible Assets, And Trademarks |  |  |  |  |  |
Intangible asset impairment charges | $ 0 | $ 19,571 | $ 0 | $ 19,571 |  |
Accumulated amortization | 59,973 |  | 59,973 |  | $ 58,120 |
Distribution networks |  |  |  |  |  |
Distribution Rights, Developed Technology Rights, Customer Contracts And Relationships, Other Intangible Assets, And Trademarks |  |  |  |  |  |
Accumulated amortization | 38,060 |  | 38,060 |  | 38,060 |
Completed technologies |  |  |  |  |  |
Distribution Rights, Developed Technology Rights, Customer Contracts And Relationships, Other Intangible Assets, And Trademarks |  |  |  |  |  |
Accumulated amortization | 13,835 |  | 13,835 |  | 12,397 |
Completed technologies | Sualab |  |  |  |  |  |
Distribution Rights, Developed Technology Rights, Customer Contracts And Relationships, Other Intangible Assets, And Trademarks |  |  |  |  |  |
Intangible asset impairment charges |  | 10,070 |  |  |  |
Customer relationships |  |  |  |  |  |
Distribution Rights, Developed Technology Rights, Customer Contracts And Relationships, Other Intangible Assets, And Trademarks |  |  |  |  |  |
Accumulated amortization | 7,520 |  | 7,520 |  | 7,160 |
Customer relationships | EnShape GmbH |  |  |  |  |  |
Distribution Rights, Developed Technology Rights, Customer Contracts And Relationships, Other Intangible Assets, And Trademarks |  |  |  |  |  |
Intangible asset impairment charges |  | 219 |  |  |  |
Intangible assets acquired |  | 0 |  | $ 0 |  | $ 447
Accumulated amortization |  |  |  |  |  | $ 228
Customer relationships | Sualab |  |  |  |  |  |
Distribution Rights, Developed Technology Rights, Customer Contracts And Relationships, Other Intangible Assets, And Trademarks |  |  |  |  |  |
Intangible asset impairment charges |  | 3,382 |  |  |  |
Non-compete agreements |  |  |  |  |  |
Distribution Rights, Developed Technology Rights, Customer Contracts And Relationships, Other Intangible Assets, And Trademarks |  |  |  |  |  |
Accumulated amortization | 464 |  | 464 |  | 436 |
Trademarks |  |  |  |  |  |
Distribution Rights, Developed Technology Rights, Customer Contracts And Relationships, Other Intangible Assets, And Trademarks |  |  |  |  |  |
Accumulated amortization | $ 94 |  | $ 94 |  | $ 67 |
In-process technologies | Sualab |  |  |  |  |  |
Distribution Rights, Developed Technology Rights, Customer Contracts And Relationships, Other Intangible Assets, And Trademarks |  |  |  |  |  |
Intangible asset impairment charges |  | $ 5,900 |  |  |  |

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