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Summary of significant accounting policies (Tables) | 6 Months Ended
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Jun. 30, 2026
Summary of significant accounting policies |
Schedule of potentially dilutive securities excluded from calculation of diluted net loss per share | The following table sets forth the potentially dilutive securities that have been excluded from the calculation of diluted net loss per share because to include them would be anti-dilutive (in common stock equivalent shares):
​ | ​ | ​ | ​ | ​
​ | ​ | Six Months Ended June 30,
​ | ​ ​ ​ | 2026 | ​ ​ ​ | 2025
Convertible preferred stock (as converted) | ​ | 15,596 | ​ | 15,596
Options to purchase common stock |  | 1,137,333 |  | 815,723
Warrants to purchase common stock |  | 48,538,891 |  | 2,194,788
Unvested restricted stock units | ​ | 65,438 | ​ | 32,697
Total shares of common stock equivalents |  | 49,757,258 |  | 3,058,804

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
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