Summary of significant accounting policies - Change in accounting policy (Details) |
Jun. 30, 2024
USD ($)
|
|---|---|
| As previously reported | |
| Revenue | |
| Assets related to custodian digital assets of customers | $ 20,892,932 |
| Liabilities related to custodian digital assets of customers | 20,892,932 |
| Adjustment | |
| Revenue | |
| Assets related to custodian digital assets of customers | (20,892,932) |
| Liabilities related to custodian digital assets of customers | $ (20,892,932) |