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Share Capital (Tables) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2018 | Dec. 31, 2017
Equity [Abstract] |  |
Summary of Stock Option Activity | A summary of the Company’s option activity related to options to employees and directors, and related information is as follows:
|  | For the six months ended June 30, 2018(*) |
|  | Number of stock options |  |  | Weighted average exercise price |  |  | Aggregate intrinsic value |
Outstanding at beginning of period |  |  | 414,965 |  |  | $ | 11.7 |  |  | $ | 1,859 |
Granted |  |  | - |  |  |  | - |  |  |  | - |
Exercised |  |  | (2,487 | ) |  |  | - |  |  |  | - |
Cancelled |  |  | - |  |  |  | - |  |  |  | - |
Outstanding at end of period |  |  | 412,478 |  |  | $ | 11.7 |  |  | $ | 1,259 |
Vested and expected-to-vest at end of period |  |  | 205,024 |  |  | $ | 6.9 |  |  | $ | 1,248 |
| (*) | Share data represents the number of shares adjusted to retroactively reflect the 1:15 Reverse Split effected on September 4, 2018.
|  | For the year ended December 31, 2017(*) |
|  | Number of stock options |  |  | Weighted average exercise price |  |  | Aggregate intrinsic value |
Outstanding at beginning of period |  |  | 174,328 |  |  | $ | 1.95 |  |  | $ | 3,739 |
Granted |  |  | 272,090 |  |  |  | 16.5 |  |  |  | - |
Exercised |  |  | (31,453 | ) |  |  | - |  |  |  | - |
Cancelled |  |  | - |  |  |  | - |  |  |  | - |
Outstanding at end of period |  |  | 414,965 |  |  | $ | 11.7 |  |  | $ | 1,859 |
Vested and expected-to-vest at end of period |  |  | 142,875 |  |  | $ | 1.95 |  |  | $ | 1,375 |
| (*) | Share data represents the number of shares adjusted to retroactively reflect the 1:15 Reverse Split effected on September 4, 2018.
| A summary of the Company’s option activity related to options to employees and directors, and related information is as follows:
|  | For the year ended December 31, 2017(**) |
|  | Number of stock options |  |  | Weighted average exercise price |  |  | Aggregate intrinsic value |
Outstanding at beginning of period |  |  | 174,328 |  |  | $ | 1.95 |  |  | $ | 3,739 |
Granted |  |  | 272,090 |  |  |  | 16.5 |  |  |  | - |
Exercised |  |  | (31,453 | ) |  |  | - |  |  |  | - |
Cancelled |  |  | - |  |  |  | - |  |  |  | - |
|  |  | 414,965 |  |  | $ | 11.7 |  |  | $ | 1,859 |
Outstanding at end of period |  |  | 142,875 |  |  | $ | 1.95 |  |  | $ | 1,375 |
Vested and expected-to-vest at end of period |  |  | 174,328 |  |  | $ | 1.95 |  |  | $ | 3,739 |
|  | For the year ended December 31, 2016(**) |
|  | Number of stock options |  |  | Weighted average exercise price |  |  | Aggregate intrinsic value |
Outstanding at beginning of period |  |  | 77,846 |  |  | $ | 4.2 |  |  |  | - |
Granted |  |  | 96,482 |  |  |  | (*) |  |  |  | - |
Exercised |  |  | - |  |  |  | - |  |  |  | - |
Cancelled |  |  | - |  |  |  | - |  |  |  | - |
Outstanding at end of period |  |  | 174,328 |  |  | $ | 1.95 |  |  | $ | 15,624 |
Vested and expected-to-vest at end of period |  |  | 174,328 |  |  | $ | 1.95 |  |  | $ | 15,624 |
(*) Less than 1 (**) December 31 2017 and 2016 options data represents the number of shares adjusted to retroactively reflect the 1:15 Reverse Split effected on September 4, 2018.
Schedule of Stock Options Outstanding | The stock options outstanding as of June 30, 2018 and December 31, 2017, separated by exercise prices, are as follows(**):
Exercise price $ |  |  | Stock options outstanding as of June 30, 2018 |  |  | Stock options outstanding as of December 31, 2017 |  |  | Weighted average remaining contractual life – years as of June 30, 2018 |  |  | Weighted average remaining contractual life – years as of December 31, 2017 |  |  | Stock options exercisable as of June 30, 2018 |  |  | Stock options exercisable as of December 31, 2017 |
| 4.2 |  |  |  | 77,846 |  |  |  | 77,846 |  |  |  | 7.50 |  |  |  | 8.0 |  |  |  | 77,846 |  |  |  | 77,846 |
| 15.75 |  |  |  | 133,546 |  |  |  | 133,546 |  |  |  | 9.25 |  |  |  | 9.75 |  |  |  | 32,133 |  |  |  | - |
| 19.35 |  |  |  | 72,508 |  |  |  | 72,508 |  |  |  | 9.25 |  |  |  | 9.75 |  |  |  | 18,127 |  |  |  | - |
| 15.3 |  |  |  | 66,036 |  |  |  | 66,036 |  |  |  | 9.50 |  |  |  | 10 |  |  |  | 14,376 |  |  |  | - |
| (*) |  |  |  | 62,542 |  |  |  | 65,029 |  |  |  | 8.25 |  |  |  | 8.75 |  |  |  | 62,542 |  |  |  | 65,029 |
|  |  |  |  | 412,478 |  |  |  | 414,965 |  |  |  | 8.80 |  |  |  | 9.3 |  |  |  | 205,024 |  |  |  | 142,875 |
| (*) | Less than 0.01
| (**) | Share data represents the number of shares adjusted to retroactively reflect the 1:15 Reverse Split effected on September 4, 2018.
| The stock options outstanding as of December 31, 2017 and December 31, 2016, separated by exercise prices, are as follows:
Exercise price |  |  | Stock options outstanding as of December 31, (**) |  |  | Weighted average remaining contractual life – years as of December 31, (**) |  |  | Stock options exercisable as of December 31, (**) |
$ |  |  | 2017 |  |  | 2016 |  |  | 2017 |  |  | 2016 |  |  | 2017 |  |  | 2016 |
| 4.2 |  |  |  | 77,846 |  |  |  | 77,846 |  |  |  | 8.0 |  |  |  | 8.0 |  |  |  | 77,846 |  |  |  | 77,846 |
| 15.75 |  |  |  | 133,546 |  |  |  | - |  |  |  | 9.75 |  |  |  | - |  |  |  | - |  |  |  | - |
| 19.35 |  |  |  | 72,508 |  |  |  | - |  |  |  | 9.75 |  |  |  | - |  |  |  | - |  |  |  | - |
| 15.3 |  |  |  | 66,036 |  |  |  | - |  |  |  | 10 |  |  |  | - |  |  |  | - |  |  |  | - |
| (* | ) |  |  | 65,029 |  |  |  | 96,482 |  |  |  | 8.75 |  |  |  | 9.5 |  |  |  | 65,029 |  |  |  | 96,482 |
|  |  |  |  | 414,965 |  |  |  | 174,328 |  |  |  | - |  |  |  | - |  |  |  | 142,875 |  |  |  | 174,328 |
(*) Less than 1 (**) December 31 2017 and 2016 options data represents the number of shares adjusted to retroactively reflect the 1:15 Reverse Split effected on September 4, 2018.
Schedule of Stock Options Valuation Assumptions | The fair value of the stock options is estimated at the date of grant using Black-Scholes options pricing model with the following weighted-average assumptions:
|  | Six months ended June 30, 2018 |  |  | Year ended December 31, 2017 |
Expected volatility |  |  | 109 | % |  |  | 122.5 | %
Risk-free interest |  |  | 2.39 | % |  |  | 1.64 | %
Dividend yield |  |  | 0 | % |  |  | 0 | %
Expected life of up to (years) |  |  | 2.75 |  |  |  | 6.25 |
| The fair value of the stock options is estimated at the date of grant using Black-Scholes options pricing model with the following weighted-average assumptions:
|  | Years ended December 31, |
|  | 2017 |  |  | 2016 |
Expected volatility |  |  | 122.5 | % |  |  | 77.3 | %
Risk-free interest |  |  | 1.64 | % |  |  | 0.6 | %
Dividend yield |  |  | 0 | % |  |  | 0 | %
Expected life of up to (years) |  |  | 6.25 |  |  |  | 5.0 |

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