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v3.25.2

Summary of significant accounting policies (Tables) | 6 Months Ended
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Jun. 30, 2025
Accounting Policies [Abstract] |
Reconciliation of cash | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | End of |  | Beginning of
​ |  | period- |  | period-
​ |  | June 30, |  | December 31,
​ |  | 2025 | ​ | 2024
Cash and cash equivalents | ​ | $ | 1,017,386 | ​ | $ | 779,709
Restricted cash included in deposits and other assets | ​ |  | 15,683 | ​ |  | 15,607
Total Cash, cash equivalents and restricted cash per consolidated statement of cash flows | ​ | $ | 1,033,069 | ​ | $ | 795,316
Schedule of Inventory | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | June 30, 2025 |  | December 31, 2024
Raw materials | ​ | $ | 2,189 | ​ | $ | 2,538
Work in progress | ​ |  | 24,365 | ​ |  | 12,216
Finished goods | ​ |  | 7,507 | ​ |  | 8,440
Total inventory | ​ | $ | 34,061 | ​ | $ | 23,194

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