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v3.22.1

Summary of significant accounting policies (Tables) | 3 Months Ended
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Mar. 31, 2022
Accounting Policies [Abstract] |
Reconciliation of cash | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | End of |  | ​ | Beginning of
​ |  | period- |  | period-
​ |  | March 31, |  | December 31,
​ |  | 2022 | ​ | 2021
Cash and cash equivalents | ​ | $ | 144,178 | ​ | $ | 189,718
Restricted cash included in deposits and other assets | ​ |  | 7,500 | ​ |  | 7,500
Total Cash, cash equivalents and restricted cash per statement of cash flows | ​ | $ | 151,678 | ​ | $ | 197,218
Schedule of Inventory | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | March 31, 2022 |  | December 31, 2021
Raw materials | ​ | $ | 1,501 | ​ | $ | 1,418
Work in progress | ​ |  | 8,070 | ​ |  | 7,721
Finished goods | ​ |  | 5,710 | ​ |  | 6,717
Total inventory | ​ | $ | 15,281 | ​ | $ | 15,856

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