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Share-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2022
Share-based Payment Arrangement [Abstract] |
Schedule of Share-Based Compensation Expense | The following table summarizes the components of share-based compensation expense for the years ended December 31, 2022 and 2021 ($ in thousands):
| Year Ended December 31,
| 2022 |  | 2021 |  |
Research and development | $ | 776 |  |  | $ | 760 |  |  |
General and administrative | 1,860 |  |  | 1,245 |  |  |
Total share-based compensation expense | $ | 2,636 |  |  | $ | 2,005 |  |  |
Total compensation cost related to unvested awards not yet recognized and the weighted-average periods over which the awards are expected to be recognized at December 31, 2022 were as follows ($ in thousands):
| Stock Options |  | Restricted Stock Units |  |  |  | Restricted Stock
Unrecognized compensation cost | $ | 1,241 |  |  | $ | 113 |  |  |  |  | $ | 570 |
Expected weighted-average period in years of compensation cost to be recognized | 1.47 |  | 2.59 |  |  |  | 1.65
Schedule of Fair Value of Shares Vested and Weighted Average Estimated Fair Values of Shares Granted | Total fair value of shares vested and the weighted average estimated fair values of shares granted for the years ended December 31, 2022 and 2021 were as follows ($ in thousands):
|  | Stock Options |  |
|  | Year Ended December 31, |  |
|  | 2022 |  | 2021 |  |  |  |  |  |  |  |
Total fair value of shares vested |  | $ | 1,045 |  |  | $ | 757 |  |  |  |  |  |  |  |  |
Weighted average estimated fair value of shares granted |  | 1.23 |  |  | 0.91 |  |  |  |  |  |  |  |  |
Schedule of Assumptions in Calculating Fair Values of Stock Options | The range of assumptions made in calculating the fair values of stock options was as follows:
| Stock Options |  |
| Year Ended December 31, |  |
| 2022 |  | 2021 |  |  |  |  |  |  |  |
Expected term - minimum (in years) | 6 |  | 6 |  |  |  |  |  |  |  |
Expected term - maximum (in years) | 6 |  | 6 |  |  |  |  |  |  |  |
Expected volatility - minimum | 76% |  | 79% |  |  |  |  |  |  |  |
Expected volatility - maximum | 78% |  | 84% |  |  |  |  |  |  |  |
Weighted Average volatility | 76% |  | 81% |  |  |  |  |  |  |  |
Expected dividend yield | — |  | — |  |  |  |  |  |  |  |
Risk-free interest rate - minimum | 1.62% |  | 0.63% |  |  |  |  |  |  |  |
Risk-free interest rate - maximum | 2.90% |  | 1.16% |  |  |  |  |  |  |  |

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=122041274&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the weighted-average grant-date fair value of equity options or other equity instruments granted during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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