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Equity Incentive Plans (Tables) | 12 Months Ended
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Dec. 31, 2024
Equity Incentive Plans |
Schedule of Stock Option Activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Options Outstanding
​ | ​ | ​ | ​ | ​ | ​ | ​ | Weighted | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | Average | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted | ​ | Remaining | ​ | ​ | ​
​ | ​ | ​ | ​ | Average | ​ | Contractual | ​ | Aggregate
​ | ​ | ​ | ​ | Exercise | ​ | Term | ​ | Intrinsic
​ |  | Shares |  | Price |  | (Years) |  | Value (in thousands)
Outstanding at December 31, 2023 |  | 3,165,216 | ​ | $ | 5.04 |  | 5.9 | ​ | $ | 429
Granted |  | 1,859,054 | ​ | $ | 3.34 |  | ​ |  | $ | —
Exercised | ​ | (37,282) | ​ | $ | 3.38 | ​ | ​ | ​ | $ | 24
Forfeited/Cancelled/Expired |  | (1,231,023) | ​ | $ | 6.48 |  | ​ |  | $ | 4
Outstanding at December 31, 2024 |  | 3,755,965 | ​ | $ | 3.74 |  | 7.5 | ​ | $ | 4
Vested and expected to vest at December 31, 2024 |  | 3,755,965 | ​ | $ | 3.74 |  | 7.5 | ​ | $ | 4
Exercisable at December 31, 2024 |  | 2,059,396 | ​ | $ | 4.04 |  | 6.4 | ​ | $ | 2
Schedule of restricted stock awards | ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted Avg
​ | ​ | ​ | ​ | Grant Date
​ |  | Shares |  | Fair Value
Outstanding at December 31, 2023 | ​ | 200,000 | ​ | $ | 2.39
Granted | ​ | 90,000 | ​ | $ | 3.38
Vested | ​ | (50,000) | ​ | $ | 2.39
Cancelled | ​ | (20,000) | ​ | $ | 3.38
Outstanding at December 31, 2024 | ​ | 220,000 | ​ | $ | 2.73
Schedule of Assumptions Used in the Black-Scholes Model | ​
​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
​ |  | 2024 |  | 2023
Risk-free interest rate | ​ | 3.54%-4.25% | ​ | 3.54%-5.54%
Expected volatility | ​ | 89.40%-92.50% | ​ | 75.40%-116.96%
Expected term (in years) | ​ | 5.1-7.0 | ​ | 0.1-7.0
Expected dividend yield | ​ | 0% | ​ | 0%
Schedule of Stock-Based Compensation Expenses | The tables below summarize the total stock-based compensation expense (reversal) included in the Company’s consolidated statements of operations for the periods presented (in thousands): ​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
​ |  | 2024 |  | 2023
Research and development | ​ | $ | 663 | ​ | $ | 1,013
General and administrative | ​ |  | 2,230 | ​ |  | (75)
Total stock-based compensation | ​ | $ | 2,893 | ​ | $ | 938
​

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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -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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