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Stock-Based Compensation (Tables) | 6 Months Ended
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Jun. 30, 2024
Stock-Based Compensation |
Schedule of Stock Based Compensation Expense | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Three Months Ended |  | Six Months Ended |
​ |  | June 30, |  | June 30, |
​ |  | 2024 |  | 2023 |  | 2024 |  | 2023 | ​
General and administrative | ​ | $ | 168 | ​ | $ | 243 | ​ | $ | 321 | ​ | $ | 522 | ​
Research and development | ​ | ​ | 21 | ​ | $ | 116 | ​ | ​ | 71 | ​ | ​ | 238 | ​
Stock-based compensation costs | ​ | $ | 189 | ​ | $ | 359 | ​ | $ | 392 | ​ | $ | 760 | ​
Schedule of Fair Value of the Stock Options Granted | ​
​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​
​ | ​ | Six months ended | ​ | Six months ended
​ |  | June 30, 2024 |  | June 30, 2023
Expected term (years) |  | 6 |  | 5 - 6
Risk free interest rate |  | 3.995% | ​ | 3.660%  – 4.050%
Volatility |  | 93% | ​ | 89% – 92%
Expected dividend yield over expected term |  | 0.00% | ​ | 0.00%
Resulting weighted average grant date fair value |  | $1.77 | ​ | $6.63
Schedule of Share Option Activity | A summary of the share option activity and related information is as follows:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | ​ | ​ |  | Weighted |  | ​ | ​
​ |  | ​ |  | Weighted |  | Average |  | ​ | ​
​ |  | Number of |  | Average |  | Remaining |  | Aggregate
​ | ​ | Options |  | Exercise |  | Contractual | ​ | Intrinsic
​ | ​ | Outstanding | ​ | Price Per Share |  | Term (Years) | ​ | Value ($000)
Options outstanding at December 31, 2023 |  | 142,796 | ​ | $ | 50.20 |  | 7.96 | ​ | $ | —
Granted | ​ | 12,500 | ​ | $ | 2.28 |  | — | ​ | $ | —
Exercised | ​ | — | ​ | $ | — |  | — | ​ | $ | —
Cancelled/forfeited | ​ | (23,552) | ​ | $ | 47.39 |  | — | ​ | $ | —
Options outstanding at June 30, 2024 |  | 131,744 | ​ | $ | 46.16 |  | 7.32 | ​ | $ | —
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Unvested at June 30, 2024 |  | 27,377 | ​ | $ | 16.51 |  | 8.72 | ​ | $ | —
Vested and exercisable at June 30, 2024 |  | 104,367 | ​ | $ | 53.94 |  | 6.95 | ​ | $ | —
Schedule of Restricted Stock Units Activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Weighted | ​ | Weighted
​ |  | ​ |  | Average | ​ | Average
​ | ​ | Restricted |  | Grant Date | ​ | Remaining
​ | ​ | Stock Units | ​ | Value Per Share | ​ | Term
Restricted Stock Units outstanding at December 31, 2023 |  | 34,498 | ​ | $ | 16.26 | ​ | 8.96 years
Granted | ​ | 12,500 | ​ | ​ | 2.28 | ​ | ​
Cancelled/forfeited | ​ | (6,072) | ​ | ​ | 15.76 | ​ | ​
Restricted Stock Units outstanding at June 30, 2024 | ​ | 40,926 | ​ | $ | 12.07 | ​ | 8.80 years
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Unvested at June 30, 2024 |  | 13,531 | ​ | $ | 11.90 | ​ | 8.71 years
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Vested at June 30, 2024 |  | 27,396 | ​ | $ | 12.15 | ​ | 8.84 years
​

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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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