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Stock-Based Compensation (Tables) | 6 Months Ended
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Jun. 30, 2023
Stock Based Compensation [Abstract] |
Schedule of Stock Based Compensation Expense | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Three Months Ended |  | Six Months Ended |
​ |  | June 30, |  | June 30, |
​ |  | 2023 |  | 2022 |  | 2023 |  | 2022 | ​
General and administrative | ​ | $ | 243 | ​ | $ | 216 | ​ | $ | 522 | ​ | $ | 469 | ​
Research and development | ​ | ​ | 116 | ​ | $ | 134 | ​ | $ | 238 | ​ | $ | 262 | ​
Stock-based compensation costs before income taxes | ​ | $ | 359 | ​ | $ | 350 | ​ | $ | 760 | ​ | $ | 731 | ​
Schedule of Fair Value of the Stock Options Granted | ​
​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​
​ | ​ | Six months ended | ​ | Six months ended
​ |  | June 30, 2023 |  | June 30, 2022
Expected term (years) |  | 5-6 |  | 5-6
Risk free interest rate |  | 3.660%  – 4.050% | ​ | 1.370% – 3.605%
Volatility |  | 89% – 92% | ​ | 87% – 93%
Expected dividend yield over expected term |  | 0.00% | ​ | 0.00%
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, 2022 |  | 1,610,590 | ​ | $ | 5.85 |  | 8.34 | ​ | $ | —
Granted |  | 650,128 | ​ | $ | 0.59 |  | — | ​ |  | —
Cancelled/forfeited |  | (65,372) | ​ | $ | 15.53 |  | — | ​ |  | —
Options outstanding at June 30, 2023 |  | 2,195,346 | ​ | $ | 4.00 |  | 8.41 | ​ | $ | 3
Unvested at June 30, 2023 |  | 1,097,852 | ​ | $ | 1.80 |  | 9.32 | ​ | $ | 3
Vested and exercisable at June 30, 2023 |  | 1,097,494 | ​ | $ | 6.21 |  | 7.50 | ​ | $ | —
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 June 30, 2023 | ​ | 521,971 | ​ | $ | 1.08 | ​ | 9.46 years
Unvested at June 30, 2023 |  | 400,927 | ​ | $ | 0.82 | ​ | 9.70 years
Vested and exercisable at June 30, 2023 |  | 121,044 | ​ | $ | 1.95 | ​ | 8.68 years

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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 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 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 -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 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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