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Goodwill and Intangible Assets | 12 Months Ended
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Dec. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Intangible Assets | Goodwill and Intangible Assets Goodwill The change in the carrying value of goodwill for the years ended December 31, 2025 and 2024, categorized by reportable segment, is as follows (in thousands):
|  | Clear Aligner |  | Systems and Services |  | Total
Balance as of December 31, 2023 |  | $ | 111,086 |  |  | $ | 308,444 |  |  | $ | 419,530 |
Additions from acquisition |  | 47,576 |  |  | — |  |  | 47,576 |
Foreign currency translation adjustments |  | (6,017) |  |  | (18,459) |  |  | (24,476) |
Balance as of December 31, 2024 |  | 152,645 |  |  | 289,985 |  |  | 442,630 |
Foreign currency translation adjustments |  | 11,610 |  |  | 37,593 |  |  | 49,203 |
Balance as of December 31, 2025 |  | $ | 164,255 |  |  | $ | 327,578 |  |  | $ | 491,833 |
We completed our annual goodwill impairment assessment in 2025 and 2024 and determined there were no impairments. Finite-Lived Intangible Assets Acquired finite-lived intangible assets, excluding intangibles that were fully amortized, are as follows (in thousands):
|  | Weighted Average Amortization Period (in years) |  | Gross Carrying Amount as of December 31, 2025 |  | Accumulated Amortization |  | Accumulated Impairment Loss |  | Net Carrying Value as of December 31, 2025
Existing technology |  | 11 |  | $ | 146,651 |  |  | $ | (67,138) |  |  | $ | — |  |  | $ | 79,513 |
Customer relationships |  | 10 |  | 21,500 |  |  | (12,363) |  |  | — |  |  | 9,137 |
Trademarks and tradenames 1 |  | 7 |  | 9,800 |  |  | (8,050) |  |  | — |  |  | 1,750 |
Patents |  | 12 |  | 480 |  |  | (320) |  |  | — |  |  | 160 |
|  |  |  | $ | 178,431 |  |  | $ | (87,871) |  |  | $ | — |  |  | $ | 90,560 |
Foreign currency translation adjustments |  |  |  |  |  |  |  |  |  | 3,373 |
Total intangible assets, net |  |  |  |  |  |  |  |  |  | $ | 93,933 |
1 The Weighted Average Amortization Period decreased from 10 years to 7 years due to an intangible asset with a useful life of 15 years becoming fully amortized in 2025.
|  | Weighted Average Amortization Period (in years) |  | Gross Carrying Amount as of December 31, 2024 |  | Accumulated Amortization |  | Accumulated Impairment Loss |  | Net Carrying Value as of December 31, 2024
Existing technology |  | 11 |  | $ | 146,651 |  |  | $ | (52,238) |  |  | $ | — |  |  | $ | 94,413 |
Customer relationships |  | 10 |  | 21,500 |  |  | (10,079) |  |  | — |  |  | 11,421 |
Trademarks and tradenames |  | 10 |  | 16,600 |  |  | (9,255) |  |  | (4,122) |  |  | 3,223 |
Patents |  | 12 |  | 480 |  |  | (280) |  |  | — |  |  | 200 |
|  |  |  | $ | 185,231 |  |  | $ | (71,852) |  |  | $ | (4,122) |  |  | $ | 109,257 |
Foreign currency translation adjustments |  |  |  |  |  |  |  |  |  | (5,769) |
Total intangible assets, net |  |  |  |  |  |  |  |  |  | $ | 103,488 |
Of the $146.7 million recorded as Existing technology intangible assets as of December 31, 2025, $47.0 million was acquired during the first quarter of 2024 as part of the Cubicure Acquisition. The existing technology acquired in the Cubicure Acquisition had an estimated useful life of 13 years, which had the effect of increasing the weighted average amortization period from approximately 10 years as of December 31, 2023 to approximately 11 years as of December 31, 2024. Refer to Note 5 “Business Combination”. For the years ended December 31, 2025 and 2024, we did not identify any impairment triggering events that would indicate that the carrying value of our finite-lived intangible assets was not recoverable. The total estimated future amortization expense for these acquired finite-lived intangible assets as of December 31, 2025 is as follows (in thousands):
Fiscal Year |  | Amortization
2026 |  | $ | 17,922 |
2027 |  | 15,607 |
2028 |  | 14,505 |
2029 |  | 14,505 |
2030 |  | 6,328 |
Thereafter |  | 21,693 |
Total |  | $ | 90,560 |
Amortization expense was $18.8 million, $18.9 million and $16.4 million for the years ended December 31, 2025, 2024 and 2023, respectively.

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-30/tableOfContent Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-20/tableOfContent + Details
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