v3.26.3
Fair value measurements - Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Assets    
Digital assets $ 133,355 $ 86,515
US Treasury Securities    
Assets    
Cash equivalents 2,100,000 0
Location, Statement of Financial Position, Balance [Axis]: us-gaap:AccountsReceivableNetCurrent | Host Contract    
Liabilities    
Hybrid instruments at fair value 0 4,000
Location, Statement of Financial Position, Balance [Axis]: us-gaap:LongTermInvestments | Host Contract    
Liabilities    
Hybrid instruments at fair value 1,656 1,153
Level 1    
Assets    
Cash equivalents 65,673,263 67,483,506
Digital assets 133,355 86,515
Digital financial assets 524 542
Total assets 65,807,142 67,570,563
Liabilities    
Total liabilities 0 0
Level 2    
Assets    
Total assets 3,039 21,314
Liabilities    
Total liabilities 0 0
Level 2 | Location, Statement of Financial Position, Balance [Axis]: us-gaap:AccountsReceivableNetCurrent    
Assets    
Investments - derivatives and embedded derivatives 0 19,942
Level 2 | Location, Statement of Financial Position, Balance [Axis]: us-gaap:LongTermInvestments    
Assets    
Investments - derivatives and embedded derivatives 3,039 1,372
Level 3    
Assets    
Total assets 0  
Liabilities    
Convertible debt, net of debt discount 0 36,821
Total liabilities 0 36,821
Fair Value Measured at Net Asset Value Per Share    
Liabilities    
Cash and cash equivalents segregated for the benefit of stablecoin holders $ 62,500,000 $ 66,300,000