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Intangible Assets | 12 Months Ended
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Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangible Assets | 8. Intangible Assets Intangible assets, the majority of which were acquired in the acquisition of TIW and OilPatch Technologies (OPT), consist of the following:
|  | Estimated Useful Lives |  | 2022 |
|  |  |  | Gross Book Value |  |  | Accumulated Amortization |  |  | Foreign Currency Translation |  |  | Net Book Value |
|  |  |  | (In thousands) |
Trademarks |  | 15 years |  | $ | 8,233 |  |  | $ | (2,118 | ) |  | $ | (79 | ) |  | $ | 6,036 |
Patents |  | 15 - 30 years |  |  | 6,055 |  |  |  | (3,699 | ) |  |  | - |  |  |  | 2,356 |
Customer relationships |  | 5 - 15 years |  |  | 26,028 |  |  |  | (10,878 | ) |  |  | (234 | ) |  |  | 14,916 |
Organizational Costs |  | 3 years |  |  | 183 |  |  |  | (131 | ) |  |  | (12 | ) |  |  | 40 |
|  |  |  | $ | 40,499 |  |  | $ | (16,826 | ) |  | $ | (325 | ) |  | $ | 23,348 |
|  | Estimated Useful Lives |  | 2021 |
|  |  |  | Gross Book Value |  |  | Accumulated Amortization |  |  | Foreign Currency Translation |  |  | Net Book Value |
|  |  |  | (In thousands) |
Trademarks |  | 15 years |  | $ | 8,257 |  |  | $ | (1,579 | ) |  | $ | (23 | ) |  | $ | 6,655 |
Patents |  | 15 - 30 years |  |  | 6,058 |  |  |  | (3,285 | ) |  |  | (1 | ) |  |  | 2,772 |
Customer relationships |  | 5 - 15 years |  |  | 26,078 |  |  |  | (9,128 | ) |  |  | (38 | ) |  |  | 16,912 |
Organizational costs |  | 3 years |  |  | 185 |  |  |  | (76 | ) |  |  | (2 | ) |  |  | 107 |
|  |  |  | $ | 40,578 |  |  | $ | (14,068 | ) |  | $ | (64 | ) |  | $ | 26,446 |
Amortization expense was $2.8 million, $3.0 million, $3.0 million, respectively for each of the years 2022, 2021 and 2020. Based on the carrying value of intangible assets at December 31, 2022, amortization expense for the subsequent five years is estimated to be as follows: 2023 — $2.8 million; 2024 — $2.7 million; 2025 — $2.7 million; 2026 — $2.7 million; and 2027 — $2.5 million.

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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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