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Intangible Assets | 9 Months Ended
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Sep. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangible Assets | 5. Intangible Assets The following table summarizes information relating to the Company’s definite-lived intangible assets: Schedule of Finite-Lived Intangible Assets
|  |  |  |  | September 30, 2021 |  |  | December 31, 2020 |
|  | Weighted Average |  |  | Gross |  |  |  |  |  | Net |  |  | Gross |  |  |  |  |  | Net |
|  | Amortization Period |  |  | Carrying |  |  | Accumulated |  |  | Carrying |  |  | Carrying |  |  | Accumulated |  |  | Carrying |
|  | (Years) |  |  | Amount |  |  | Amortization |  |  | Amount |  |  | Amount |  |  | Amortization |  |  | Amount |
Other Intangibles (amount in thousands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Patent |  |  | 12.5 |  |  | $ | 784 |  |  | $ | (348 | ) |  | $ | 436 |  |  | $ | 742 |  |  | $ | (334 | ) |  | $ | 408 |
Software |  |  | 3 |  |  |  | 588 |  |  |  | (415 | ) |  |  | 173 |  |  |  | 418 |  |  |  | (411 | ) |  |  | 7 |
Customer relationships |  |  | 10 |  |  |  | 3,370 |  |  |  | (3,044 | ) |  |  | 326 |  |  |  | 3,370 |  |  |  | (2,910 | ) |  |  | 460 |
Total |  |  |  |  |  | $ | 4,742 |  |  | $ | (3,807 | ) |  | $ | 935 |  |  | $ | 4,530 |  |  | $ | (3,655 | ) |  | $ | 875 |
The intangible assets noted above are amortized on a straight-line basis over their useful lives with the exception of customer relationships which are being amortized using an accelerated method. The following table summarizes the expected amortization over the next five years for our definite-lived intangible assets: Schedule of Finite-Lived Intangible Assets, Future Amortization Expense
Year |  | (In thousands) |
2021 (remaining) |  | $ | 59 |
2022 |  |  | 227 |
2023 |  |  | 187 |
2024 |  |  | 57 |
2025 |  |  | 14 |
Amortization expense relating to the definite-lived intangible assets as discussed above was $51,000 and $152,000 for the three and nine months ended September 30, 2021, respectively, and $58,000 and $167,000 for the three and nine months ended September 30, 2020, respectively.

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- Definition The entire disclosure for all or part of the information related to 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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