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Fair Value Measurement (Tables) | 12 Months Ended
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Dec. 31, 2023
Fair Value Measurement |
Summary of category of assets or liabilities carried at fair value | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Total |  | Level 1 |  | Level 2 |  | Level 3
December 31, 2023 |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Assets |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Cash equivalents: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Money market funds | ​ | $ | 1,104 | ​ | $ | 1,104 | ​ | $ | — | ​ | $ | —
Liabilities | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Derivative liability – Class A Common Stock warrants | ​ | $ | 271 | ​ | $ | — | ​ | $ | — | ​ | $ | 271
Warrant liability – Series m-3 Preferred Stock | ​ | $ | 284 | ​ | $ | — | ​ | $ | — | ​ | $ | 284
Warrant liability – Series s Preferred Stock | ​ | $ | 5,692 | ​ | $ | — | ​ | $ | — | ​ | $ | 5,692
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Total |  | Level 1 |  | Level 2 |  | Level 3
December 31, 2022 |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Assets |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Cash equivalents: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Money market funds | ​ | $ | 3,025 | ​ | $ | 3,025 | ​ | $ | — | ​ | $ | —
Liabilities | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Warrant liability – Series m-3 Preferred Stock | ​ | $ | 1,282 | ​ | $ | — | ​ | $ | — | ​ | $ | 1,282
Warrant liability – Series s Preferred Stock | ​ | $ | 8,729 | ​ | $ | — | ​ | $ | — | ​ | $ | 8,729
Derivative liability – Class A Common Stock warrants | ​ | $ | 1,146 | ​ | $ | — | ​ | $ | — | ​ | $ | 1,146
2022 Convertible Notes | ​ | $ | 8,152 | ​ | $ | — | ​ | $ | — | ​ | $ | 8,152
Summary of changes in the fair value of Company's Level 3 warrant and convertible note liabilities | ​
​ | ​ | ​ | ​
​ |  | Warrant and Derivative Liability
Balance as of January 1, 2022 | ​ | $ | 30,566
Initial fair value of Class A Common Stock warrants | ​ |  | 1,818
Exercise of warrants | ​ | ​ | (370)
Revaluation of Class A Common Stock, Series B, m-3 and s Preferred Stock warrants | ​ |  | (20,857)
Balance as of December 31, 2022 | ​ | ​ | 11,157
Warrant cancellations | ​ | ​ | (308)
Revaluation of Common Stock warrants | ​ | ​ | (875)
Revaluation of Series s and Series m-3 Preferred Stock warrants | ​ | ​ | (3,727)
Balance as of December 31, 2023 | ​ | $ | 6,247
Convertible Note Liabilities |
Fair Value Measurement |
Summary of changes in the fair value of Company's Level 3 warrant and convertible note liabilities | ​
​ | ​ | ​ | ​
Balance January 1, 2023 |  | $ | 8,152
Accretion of interest | ​ |  | 440
Note conversion | ​ |  | (8,592)
Balance as of December 31, 2023 | ​ | $ | —
​

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- Definition Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -SubTopic 10 -Topic 820 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-3 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -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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