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Goodwill and Intangible Assets (Tables) | 9 Months Ended
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Sep. 30, 2021
Goodwill And Intangible Assets Disclosure [Abstract] |
Gross Carrying Amount and Accumulated Amortization of Intangible Assets | Intangible Assets — The following table presents the gross carrying amount and accumulated amortization of our intangible assets as of September 30, 2021 and December 31, 2020 (in thousands):
| September 30, 2021 |  |  | December 31, 2020 |
| Gross |  |  |  |  |  | Net |  |  | Gross |  |  |  |  |  | Net |
| Carrying |  |  | Accumulated |  |  | Carrying |  |  | Carrying |  |  | Accumulated |  |  | Carrying |
| Amount |  |  | Amortization |  |  | Amount |  |  | Amount |  |  | Amortization |  |  | Amount |
Customer relationships | $ | 1,800 |  |  | $ | (750 | ) |  | $ | 1,050 |  |  | $ | 28,000 |  |  | $ | (26,757 | ) |  | $ | 1,243 |
Developed technology |  | 55,772 |  |  |  | (36,613 | ) |  |  | 19,159 |  |  |  | 55,772 |  |  |  | (27,515 | ) |  |  | 28,257 |
Internal use software |  | 1,251 |  |  |  | (408 | ) |  |  | 843 |  |  |  | 906 |  |  |  | (319 | ) |  |  | 587 |
| $ | 58,823 |  |  | $ | (37,771 | ) |  | $ | 21,052 |  |  | $ | 84,678 |  |  | $ | (54,591 | ) |  | $ | 30,087 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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