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Cryptocurrencies - Summary of the Adjusted Cost Basis of Cryptocurrencies (Detail) - USD ($) | 3 Months Ended | 9 Months Ended
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Sep. 30, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Indefinite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Impairment of cryptocurrencies |  |  |  |  |  |  | $ 0 | $ 0
Cryptocurrencies [Member] |  |  |  |  |  |  |  |
Indefinite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Beginning balance | $ 811,000 | $ 402,000 | $ 540,000 | $ 584,000 | $ 2,891,000 | $ 6,557,000 | 540,000 | 6,557,000
Purchases or receipts of cryptocurrencies | 139,065,000 | 153,351,000 | 127,537,000 | 141,040,000 | 135,383,000 | 129,441,000 |  |
Cost of cryptocurrencies sold or distributed | (137,288,000) | (150,552,000) | (125,488,000) | (139,272,000) | (135,615,000) | (129,881,000) |  |
Impairment of cryptocurrencies | (1,793,000) | (2,390,000) | (2,187,000) | (1,678,000) | (2,075,000) | (3,226,000) | (6,400,000) | (5,600,000)
Ending Balance | 795,000 | 811,000 | 402,000 | 674,000 | 584,000 | 2,891,000 | 795,000 | 674,000
Cryptocurrencies [Member] | Bitcoin [Member] |  |  |  |  |  |  |  |
Indefinite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Beginning balance | 810,000 | 401,000 | 523,000 | 575,000 | 815,000 | 563,000 | 523,000 | 563,000
Purchases or receipts of cryptocurrencies | 139,065,000 | 153,351,000 | 127,530,000 | 140,015,000 | 134,378,000 | 128,388,000 |  |
Cost of cryptocurrencies sold or distributed | (137,288,000) | (150,552,000) | (125,465,000) | (138,261,000) | (132,543,000) | (126,275,000) |  |
Impairment of cryptocurrencies | (1,793,000) | (2,390,000) | (2,187,000) | (1,670,000) | (2,075,000) | (1,861,000) |  |
Ending Balance | 794,000 | 810,000 | 401,000 | 659,000 | 575,000 | 815,000 | 794,000 | 659,000
Cryptocurrencies [Member] | Ethereum [Member] |  |  |  |  |  |  |  |
Indefinite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Beginning balance | 1,000 | 1,000 | 9,000 | 5,000 | 2,066,000 | 5,988,000 | 9,000 | 5,988,000
Purchases or receipts of cryptocurrencies |  |  | 4,000 | 387,000 | 12,000 | 206,000 |  |
Cost of cryptocurrencies sold or distributed |  |  | (12,000) | (379,000) | (2,073,000) | (2,770,000) |  |
Impairment of cryptocurrencies |  |  |  | 3,000 |  | (1,358,000) |  |
Ending Balance | $ 1,000 | $ 1,000 | 1,000 | 10,000 | 5,000 | 2,066,000 | 1,000 | 10,000
Cryptocurrencies [Member] | Litecoin [Member] |  |  |  |  |  |  |  |
Indefinite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Beginning balance |  |  | 8,000 | 4,000 | 10,000 | 6,000 | $ 8,000 | 6,000
Purchases or receipts of cryptocurrencies |  |  | 3,000 | 638,000 | 993,000 | 847,000 |  |
Cost of cryptocurrencies sold or distributed |  |  | $ (11,000) | (632,000) | (999,000) | (836,000) |  |
Impairment of cryptocurrencies |  |  |  | 5,000 |  | (7,000) |  |
Ending Balance |  |  |  | $ 5,000 | $ 4,000 | $ 10,000 |  | $ 5,000

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