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Share Option and Warrant Reserves (Details 3) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2021 $ / shares | Dec. 31, 2020 $ / shares | Dec. 31, 2019 $ / shares
Statement [Line Items] |  |  |
Number of share options outstanding beginning of the year | 6,751,997 | 8,141,004 | 5,602,619
Weighted average exercise price outstanding beginning of the year | $ 2.00 | $ 2.67 | $ 2.96
Options outstanding, remaining contractual life | 2 years 5 months 12 days |  |
Number of options exercisable | 4,945,125 |  |
Options exercisable, exercise price | $ 2.21 |  |
Options exercisable, remaining contractual life | 2 years 8 months 19 days |  |
Exercise Price Range 1 |  |  |
Statement [Line Items] |  |  |
Number of share options outstanding beginning of the year | 2,934,405 |  |
Weighted average exercise price outstanding beginning of the year | $ 1.28 |  |
Options outstanding, remaining contractual life | 1 year 6 months 29 days |  |
Number of options exercisable | 1,826,282 |  |
Options exercisable, exercise price | $ 1.44 |  |
Options exercisable, remaining contractual life | 2 years 3 months 18 days |  |
Exercise Price Range 2 |  |  |
Statement [Line Items] |  |  |
Number of share options outstanding beginning of the year | 3,686,324 |  |
Weighted average exercise price outstanding beginning of the year | $ 2.35 |  |
Options outstanding, remaining contractual life | 3 years 2 months 19 days |  |
Number of options exercisable | 2,987,575 |  |
Options exercisable, exercise price | $ 2.42 |  |
Options exercisable, remaining contractual life | 3 years 29 days |  |
Exercise Price Range 3 |  |  |
Statement [Line Items] |  |  |
Number of share options outstanding beginning of the year | 131,268 |  |
Weighted average exercise price outstanding beginning of the year | $ 7.88 |  |
Options outstanding, remaining contractual life | 4 months 28 days |  |
Number of options exercisable | 131,268 |  |
Options exercisable, exercise price | $ 7.88 |  |
Options exercisable, remaining contractual life | 4 months 28 days |  |

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