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Digital Assets - Additional Information (Detail) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2020 USD ($) | Sep. 30, 2020 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2020 USD ($) Bitcoin | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Intangible Assets Net Excluding Goodwill [Abstract] |  |  |  |  |  |
Number of bitcoins purchased | Bitcoin |  |  |  | 70,469 |  |
Purchases of digital assets, amount |  |  | $ 1,125,000,000 | $ 1,125,000,000 | $ 0 | $ 0
Digital asset impairment losses | $ 26,500,000 | $ 44,200,000 |  | 70,698,000 | 0 | $ 0
Digital assets | $ 1,054,302,000 |  | $ 1,054,302,000 | 1,054,302,000 | $ 0 |
Cumulative impairment of digital assets |  |  |  | 70,700,000 |  |
Sale of digital assets |  |  |  | $ 0 |  |

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- Definition Cumulative Impairment of Intangible Assets (Excluding Goodwill). + References No definition available. + Details
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- Definition Gain loss on sale of digital assets. + References No definition available. + Details
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- Definition The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275 + Details
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- Definition Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit. + 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 (b) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition The cash outflow to acquire asset without physical form usually arising from contractual or other legal rights, excluding goodwill. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585 + Details
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