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Shareholders’ equity (Tables) | 6 Months Ended
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Jun. 30, 2023
Stockholders' Equity Note [Abstract] |
Schedule of stock based compensation expense | The table below summarizes information about the Company’s stock-based compensation for the three and six months ended June 30, 2023 and 2022 and the expense recognized in the condensed consolidated statements of operations:
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2023 |  | 2022 |  | 2023 |  | 2022
| (in thousands, except share and per share data)
Stock options |  |  |  |  |  |  |
Options granted during period | 547,600 |  |  | 362,280 |  |  | 4,298,400 |  |  | 4,734,575 |
Weighted average exercise price | $ | 2.75 |  |  | $ | 2.33 |  |  | $ | 2.88 |  |  | $ | 2.78 |
Restricted stock units (“RSUs”) |  |  |  |  |  |  |
Restricted stock units granted during period | — |  |  | — |  |  | 1,344,550 |  |  | — |
Grant date fair value | $ | — |  |  | $ | — |  |  | $ | 2.90 |  |  | $ | — |
Stock compensation expense |  |  |  |  |  |  |
Research and development | $ | 977 |  |  | $ | 696 |  |  | $ | 1,852 |  |  | $ | 1,454 |
General and administrative | 1,987 |  |  | 1,369 |  |  | 3,243 |  |  | 2,346 |
Total stock compensation expense | $ | 2,964 |  |  | $ | 2,065 |  |  | $ | 5,095 |  |  | $ | 3,800 |

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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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