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Fair value measurements (Tables) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 | Dec. 31, 2023
Warrants |  |
Fair value measurements |  |
Schedule of fair value using significant unobservable inputs | ​
​ | ​ | ​ | ​ | ​
​ | ​ | March 31, | ​
Fair Value Assumption – Warrants |  | 2024 |
Exercise Price | ​ | $ | 11.50 | ​
Warrant term | ​ | ​ | 4.72 | years
Maturity date |  | ​ | 12/19/2028 | ​
Stock Price |  | $ | 2.26 | ​
Risk rate |  | ​ | 4.13 | %
Volatility | ​ | ​ | 37.68 | %
​ | ​
​ | ​ | ​ | ​ | ​
Fair Value Assumption – Warrants |  | December 31, 2023 |
Exercise Price | ​ | $ | 11.50 | ​
Warrant term | ​ | ​ | 4.97 years | ​
Maturity date | ​ |  | 12/19/2028 | ​
Stock Price | ​ | $ | 3.35 | ​
Risk rate | ​ |  | 3.75 | %
Volatility | ​ |  | 33.29 | %
​
Financing Note |  |
Fair value measurements |  |
Schedule of fair value using significant unobservable inputs | ​
​ | ​ | ​ | ​ | ​
Fair Value Assumption – Financing Note |  | March 31, 2024 |
Principal | ​ | $ | 2,330 | ​
Discount rate | ​ |  | 25.00 | %
Note term | ​ |  | 2.72 | years
Stock Price | ​ | $ | 2.26 | ​
Maturity date | ​ |  | 12/19/2026 | ​
Risk rate | ​ |  | 4.34 | %
Volatility | ​ |  | 36.33 | %
| ​
​ | ​ | ​ | ​ | ​
Fair Value Assumption – Financing Note |  | December 31, 2023 |
Principal | ​ | $ | 6,805 | ​
Discount rate | ​ |  | 20.00 | %
Note term | ​ |  | 2.97 years | ​
Stock Price | ​ | $ | 3.35 | ​
Maturity date | ​ |  | 12/19/2026 | ​
Risk rate | ​ |  | 3.92 | %
Volatility | ​ |  | 32.49 | %

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb) -SubTopic 10 -Topic 820 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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