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Goodwill and Intangible Assets | 6 Months Ended
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Jun. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Intangible Assets | 7. Goodwill and Intangible Assets Goodwill The carrying amount of goodwill was $26.3 million as of December 31, 2023. There was no change in the carrying amount of goodwill during the six months ended June 30, 2024. Acquired Intangible Assets Acquired intangible assets consisted of the following:
| June 30, 2024
| Gross carrying value |  | Accumulated amortization |  | Net carrying value |  | Weighted-average remaining useful life (years)
| (in thousands, except year data)
Developed technology | $ | 43,160 |  |  | $ | 17,213 |  |  | $ | 25,947 |  |  | 3.1
Other intangible assets | 600 |  |  | 600 |  |  | — |  |  | — |
Total acquired intangible assets | $ | 43,760 |  |  | $ | 17,813 |  |  | $ | 25,947 |  |  |
| December 31, 2023
| Gross carrying value |  | Accumulated amortization |  | Net carrying value |  | Weighted-average remaining useful life (years)
| (in thousands, except year data)
Developed technology | $ | 43,160 |  |  | $ | 12,973 |  |  | $ | 30,187 |  |  | 3.6
Other intangible assets | 600 |  |  | 467 |  |  | 133 |  |  | 0.3
Total acquired intangible assets | $ | 43,760 |  |  | $ | 13,440 |  |  | $ | 30,320 |  |  |
Amortization expense was $2.2 million and $2.3 million for the three months ended June 30, 2024 and 2023, respectively, and $4.4 million and $4.6 million for the six months ended June 30, 2024 and 2023, respectively. Cryptocurrency The net carrying value of our cryptocurrencies, which consisted primarily of Bitcoin and Ether, as well as all related cryptocurrency activity, was immaterial for the periods presented.

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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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