v3.25.2
Derivatives and embedded derivatives - Derivative instruments, gain (loss) (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Derivatives, Fair Value [Line Items]              
Obligation to return digital asset collateral - embedded derivatives $ 0 [1] $ 0 [1] $ 0 [1] $ 1,629 [1] $ 1,629 [2] $ (478) [2] $ 211,997 [2]
Accounts receivable, net - embedded derivatives (408) 0 (1,384) 0      
Prepaid expenses and other assets — embedded derivatives [3]         0 935 (3,253)
Loans payable, net of debt discount — embedded derivatives [3]             (887)
Investments - derivatives and embedded derivatives $ 1,209 [4] $ (2,734) [4] $ (4,131) [4] $ 336 [4] 8,175 [3] 2,776 [3] 1,178 [3]
Derivative [Member]              
Derivatives, Fair Value [Line Items]              
Obligation to return digital asset collateral - embedded derivatives [2]         1,629 8,553 211,997
Prepaid expenses and other assets — embedded derivatives [3]         0 935 (3,253)
Loans payable, net of debt discount — embedded derivatives [3]             (887)
Investments - derivatives and embedded derivatives [3]         8,175 2,776 1,178
Hedged Items [Member]              
Derivatives, Fair Value [Line Items]              
Obligation to return digital asset collateral - embedded derivatives         0 (9,031) [2] 0
Prepaid expenses and other assets — embedded derivatives [3]         0 0 0
Loans payable, net of debt discount — embedded derivatives [3]             0
Investments - derivatives and embedded derivatives [3]         $ 0 $ 0 $ 0
[1] Included in Digital assets (gains) losses in the unaudited Condensed Consolidated Statements of Operations.
[2] Included in Digital assets (gains) losses and impairment in the Consolidated Statements of Operations. The hedging relationships were de-designated upon the adoption of ASU 2023-08 on January 1, 2024.
[3] Included in Other income (expense), net in the Consolidated Statements of Operations.
[4] Included in Other (expense) income, net in the unaudited Condensed Consolidated Statements of Operations.