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Cryptocurrencies - Summary of the Adjusted Cost Basis of Cryptocurrencies (Detail) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Mar. 31, 2023
Jun. 30, 2022
Mar. 31, 2022
Jun. 30, 2023
Jun. 30, 2022
Indefinite-Lived Intangible Assets [Line Items]            
Impairment of cryptocurrencies         $ 0 $ 0
Cryptocurrencies [Member]            
Indefinite-Lived Intangible Assets [Line Items]            
Beginning balance $ 402,000 $ 540,000 $ 2,892,000 $ 6,558,000 540,000 6,558,000
Purchases or receipts of cryptocurrencies 153,351,000 127,537,000 135,383,000 129,441,000    
Cost of cryptocurrencies sold or distributed (150,552,000) (125,488,000) (135,614,000) (129,881,000)    
Impairment of cryptocurrencies (2,390,000) (2,187,000) (2,075,000) (3,226,000) (4,600,000) (5,300,000)
Ending Balance 811,000 402,000 586,000 2,892,000 811,000 586,000
Cryptocurrencies [Member] | Bitcoin [Member]            
Indefinite-Lived Intangible Assets [Line Items]            
Beginning balance 401,000 523,000 815,000 563,000 523,000 563,000
Purchases or receipts of cryptocurrencies 153,351,000 127,530,000 134,378,000 128,388,000    
Cost of cryptocurrencies sold or distributed (150,552,000) (125,465,000) (132,542,000) (126,275,000)    
Impairment of cryptocurrencies (2,390,000) (2,187,000) (2,075,000) (1,861,000)    
Ending Balance 810,000 401,000 576,000 815,000 810,000 576,000
Cryptocurrencies [Member] | Ethereum [Member]            
Indefinite-Lived Intangible Assets [Line Items]            
Beginning balance 1,000 9,000 2,067,000 5,989,000 9,000 5,989,000
Purchases or receipts of cryptocurrencies   4,000 11,000 206,000    
Cost of cryptocurrencies sold or distributed   (12,000) (2,073,000) (2,770,000)    
Impairment of cryptocurrencies       (1,358,000)    
Ending Balance $ 1,000 1,000 5,000 2,067,000 1,000 5,000
Cryptocurrencies [Member] | Litecoin [Member]            
Indefinite-Lived Intangible Assets [Line Items]            
Beginning balance   8,000 10,000 6,000 $ 8,000 6,000
Purchases or receipts of cryptocurrencies   3,000 994,000 847,000    
Cost of cryptocurrencies sold or distributed   $ (11,000) (999,000) (836,000)    
Impairment of cryptocurrencies       (7,000)    
Ending Balance     $ 5,000 $ 10,000   $ 5,000