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Fair Value Measurement (Tables) | 3 Months Ended
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Mar. 31, 2024
Fair value measurement |
Schedule of assets measured at fair value | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Fair value measurement at reporting date
​ | ​ | Quoted prices in active market for identical assets | ​ | ​ | Significant other observable inputs | ​ | ​ | Significant unobservable inputs
​ |  | (level 1) |  | ​ | (level 2) |  | ​ | (level 3)
March 31, 2024: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Assets | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Marketable securities available for sale | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Debt securities - U.S. government treasury securities, current | ​ | ​ | 2,019,414 | ​ | ​ | — | ​ | ​ | —
Total marketable securities available for sale | ​ | $ | 2,019,414 | ​ | $ | — | ​ | $ | —
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Cash equivalents: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Money market funds | ​ | ​ | 5,156,955 | ​ | ​ | — | ​ | ​ | —
Total cash equivalents | ​ | $ | 5,156,955 | ​ | $ | — | ​ | $ | —
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total financial assets | ​ | $ | 7,176,369 | ​ | $ | — | ​ | $ | —
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 2023: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Assets | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Marketable securities available for sale | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Debt securities - U.S. government treasury securities, current | ​ | ​ | 4,999,704 | ​ | ​ | — | ​ | ​ | —
Total marketable securities available for sale | ​ | $ | 4,999,704 | ​ | $ | — | ​ | $ | —
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Cash equivalents: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Money market funds | ​ | ​ | 6,767,291 | ​ | ​ | — | ​ | ​ | —
Total cash equivalents | ​ | $ | 6,767,291 | ​ | $ | — | ​ | $ | —
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total financial assets | ​ | $ | 11,766,995 | ​ | $ | — | ​ | $ | —
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

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- Definition Tabular disclosure of assets measured at fair value measured on a recurring or nonrecurring basis. Includes, but is not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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- References No definition available. + Details
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