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Share Capital - Stock Option Activity (Parenthetical) (Details) - shares | 6 Months Ended
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Jun. 30, 2021 | Jun. 30, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |  |
Stock Options exercised for Number of Common Shares for cash | 58,179 | 10,715
Common stock issued for cashless exercise | 179,129 | 85,660
Cashless exercise of stock options | 286,555 | 142,327

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