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SHARE-BASED COMPENSATION | 6 Months Ended
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Jun. 30, 2023
SHARE-BASED COMPENSATION |
SHARE-BASED COMPENSATION |
8. | SHARE-BASED COMPENSATION
2015 Stock Option Plan The Company maintains the 2015 Stock Option Plan (“2015 Option Plan”), originally referred to as the 2007 Option Plan. In June 2015, the 2015 Option Plan was amended from a fixed option plan to a rolling share option plan pursuant to which the Company is authorized to grant options of up to 20% of its issued and outstanding Common Shares. Share options granted vest at various rates and have a term not exceeding ten years. As of June 30, 2023 and December 31, 2022, the Company had 397,613 and 396,080 options available for grant under the 2015 Option Plan, respectively. The following table summarizes the share options outstanding under the 2015 Option Plan for the six months ended June 30, 2023. All amounts are denominated in C$, except year and share amounts: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | ​ | ​ |  | Weighted |  | ​ | ​
​ |  | ​ |  | Weighted |  | Average |  | ​ | ​
​ |  | ​ |  | Average |  | Remaining |  | ​ | ​
​ | ​ | Number of |  | Exercise |  | Contractual | ​ | Aggregate
​ | ​ | Share |  | Price Per |  | Term | ​ | Intrinsic
​ | ​ | Options | ​ | Share |  | (years) | ​ | Value
Outstanding as of December 31, 2022 |  | 1,043,025 | ​ | $ | 7.53 |  | 6.1 | ​ | $ | 1,183,860
Expired |  | (1,533) | ​ |  | 11.77 |  | — | ​ |  | 2,196
Outstanding as of June 30, 2023 |  | 1,041,492 | ​ |  | 7.53 |  | 5.6 | ​ | ​ | 781,449
Vested and exercisable as of June 30, 2023 |  | 696,625 | ​ | $ | 7.40 |  | 4.0 | ​ | $ | 781,449
​ The aggregate intrinsic value of options outstanding and vested and exercisable is calculated as the difference between the exercise price of the underlying options, and the fair value of the Company’s Common Shares when the exercise price is below fair value. There were no options exercised or granted during the six months ended June 30, 2023. Share-based Payment Expense The following table summarizes total share-based compensation included in the Company’s accompanying unaudited condensed consolidated statements of operations and comprehensive loss: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | Six Months Ended | ​
​ | ​ | June 30, | ​ | June 30, | ​
​ |  | 2023 |  | 2022 |  | 2023 |  | 2022 | ​
Research and development | ​ | $ | 39,109 | ​ | $ | 38,473 | ​ | $ | 78,018 | ​ | $ | 100,579 | ​
General and administrative | ​ |  | 95,082 | ​ |  | 78,470 | ​ |  | 188,683 | ​ |  | 139,698 | ​
Total share-based compensation | ​ | $ | 134,191 | ​ | $ | 116,943 | ​ | $ | 266,701 | ​ | $ | 240,277 | ​
​ As of June 30, 2023, there was C$1,835,060 of unrecognized share-based compensation related to options outstanding, which is expected to be recognized over weighted-average remaining service period of 2.8 years.

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