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Cryptocurrencies - Summary of the Adjusted Cost Basis of Cryptocurrencies (Detail) - USD ($)
 3 Months Ended 9 Months Ended
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