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Intangible Assets and Goodwill | 3 Months Ended
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Mar. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangible Assets and Goodwill | Intangible Assets and Goodwill Intangibles The details of amortizing intangible assets are as follows (in thousands, except for estimated useful lives):
| Estimated useful life (in years) |  | As of
|  | March 31, 2021 |  | December 31, 2020
Patents | 3 - 5 |  | $ | 6,261 |  |  | $ | 6,199 |
Development programs | 2 - 4 |  | 7,200 |  |  | 7,200 |
Developed technology | 5 |  | 1,226 |  |  | 1,226 |
|  |  | 14,687 |  |  | 14,625 |
Accumulated amortization |  |  | (7,278) |  |  | (6,280) |
|  |  | $ | 7,409 |  |  | $ | 8,345 |
Estimated amortization expense for future years is as follows (in thousands):
Remainder of 2021 | $ | 2,878 |
2022 | 2,357 |
2023 | 1,674 |
2024 | 364 |
2025 | 136 |
| $ | 7,409 |
Goodwill The carrying amount of goodwill by segment was as follows (in thousands):
| Laser Products |  | Advanced Development |  | Totals
Balance, December 31, 2020 | $ | 2,236 |  |  | $ | 10,248 |  |  | $ | 12,484 |
Currency exchange rate adjustment | (37) |  |  | — |  |  | (37) |
Balance, March 31, 2021 | $ | 2,199 |  |  | $ | 10,248 |  |  | $ | 12,447 |

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- Definition The entire disclosure for goodwill and 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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