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SHARE CAPITAL (Tables) | 12 Months Ended
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Dec. 31, 2017
SHARE CAPITAL [Abstract] |
Schedule of Options and Restricted Stocks Granted | Below is a table summarizing all of the options grants to employees during the year ended December 31, 2015:
Year of grant |  | No. of options granted |  | Exercise price |  | Vesting period |  | Fair value at grant (U.S. dollars in thousands) |  | Expiration period |
| 2015 |  |  | 1,909,000 |  | $ | 1.72 |  |  | 4 years |  | $ | 1,900 |  |  | 10 years |
Summary of Stock Option Activity - Options Granted to Employees |
| a. | Options granted to employees:
|  | Year ended December 31, |
|  | 2015 |  | 2016 |  | 2017 |
|  |  |  |  | Weighted |  |  |  |  | Weighted |  |  |  |  | Weighted |
|  | Number |  | average |  | Number |  | Average |  | Number |  | average |
|  | of |  | exercise |  | of |  | Exercise |  | of |  | exercise |
|  | options |  | price |  | options |  | Price |  | options |  | price |
Outstanding at beginning of year |  |  | 5,870,309 |  | $ | 3.770 |  |  | 6,952,293 |  | $ | 3.363 |  |  | 4,884,211 |  | $ | 3.617 |
Changes during the year: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted |  |  | 1,909,000 |  |  | 1.72 |  |  |  |  |  |  |  |  |  |  |  |  |
Forfeited and Expired |  |  | 277,016 |  |  | 5.395 |  |  | 1,514,957 |  |  | 3.748 |  |  | 154,594 |  |  | 4.004 |
Exercised (*) |  |  | 550,000 |  |  | 0.972 |  |  | 553,125 |  |  | 0.067 |  |  |  |  |  |  |
Outstanding at end of year |  |  | 6,952,293 |  | $ | 3.363 |  |  | 4,884,211 |  | $ | 3.617 |  |  | 4,729,617 |  | $ | 3.604 |
Exercisable at end of year |  |  | 4,477,043 |  | $ | 4.182 |  |  | 3,498,492 |  | $ | 4.296 |  |  | 4,457,461 |  | $ | 3.696 |
(*) The total intrinsic value of options exercised during the years ended December 31, 2015, 2016 and 2017, was approximately $675,000, $213,000 and $0, respectively.
Summary of Restricted Stock Activity - Options Granted to Employees |
| b. | Restricted stock granted to employees:
|  | Year ended December 31, |
|  | 2015 |  | 2016 |
|  | Number of restricted stock |
Outstanding at beginning of year |  |  | 386,124 |  |  | 127,874 |
Changes during the year: |  |  |  |  |  |  |
Vested |  |  | 255,749 |  |  | 127,874 |
Forfeited |  |  | 2,501 |  |  | - |
Outstanding at end of year |  |  | 127,874 |  |  | - |
Schedule of Options Granted to Service Providers | Options and restricted stocks granted to consultants, directors, and other service providers:
|  | Year ended December 31, |
|  | 2015 |  | 2016 |  | 2017 |
|  | Number |  |  |  |  | Number |  |  |  |  | Number |  |  |  |
|  | of |  | Weighted |  | of |  | Weighted |  | of |  | Weighted |
|  | options/ |  | average |  | options/ |  | average |  | options/ |  | average |
|  | restricted |  | exercise |  | restricted |  | exercise |  | restricted |  | exercise |
|  | stock |  | price |  | stock |  | price |  | stock |  | price |
Outstanding at beginning of Year |  |  | 1,208,592 |  | $ | 6.136 |  |  | 637,209 |  | $ | 11.638 |  |  | 208,000 |  | $ | 3.156 |
Changes during the year: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expired |  |  | 466,883 |  |  | 0.001 |  |  | 429,209 |  |  | 15.748 |  |  | 8,000 |  |  | 0.001 |
Vested restricted stock |  |  | 104,500 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding at end of year |  |  | 637,209 |  |  | 11.638 |  |  | 208,000 |  |  | 3.156 |  |  | 200,000 |  |  | 3.282 |
Exercisable at end of year |  |  | 549,709 |  | $ | 12.954 |  |  | 170,500 |  | $ | 3.109 |  |  | 200,000 |  | $ | 3.282 |
Schedule of Information about Share Options Outstanding | The following tables summarize information concerning outstanding and exercisable options and restricted stock as of December 31, 2017:
December 31, 2017 |
Options outstanding |  | Options exercisable |
Exercise prices |  | Number of options outstanding at end of year |  | Weighted average remaining contractual life |  | Number of options exercisable |  | Weighted average remaining contractual life |
| n/a (Restricted Stock) |  |  |  |  |  |  |  |  | n/a |  |  | n/a |
$ | 1.720 |  |  | 1,720,685 |  |  | 7.22 |  |  | 1,617,279 |  |  | 7.22 |
$ | 2.350 |  |  | 40,000 |  |  | 0.81 |  |  | 40,000 |  |  | 0.81 |
$ | 2.370 |  |  | 900,000 |  |  | 6.74 |  |  | 731,250 |  |  | 6.74 |
$ | 2.650 |  |  | 211,682 |  |  | 1.15 |  |  | 211,682 |  |  | 1.15 |
$ | 3.020 |  |  | 50,000 |  |  | 0.10 |  |  | 50,000 |  |  | 0.10 |
$ | 3.370 |  |  | 150,000 |  |  | 6.56 |  |  | 150,000 |  |  | 6.56 |
$ | 5.000 |  |  | 949,250 |  |  | 0.10 |  |  | 949,250 |  |  | 0.10 |
$ | 6.900 |  |  | 680,000 |  |  | 2.15 |  |  | 680,000 |  |  | 2.15 |
$ | 7.550 |  |  | 160,000 |  |  | 2.65 |  |  | 160,000 |  |  | 2.65 |
$ | 9.660 |  |  | 68,000 |  |  | 2.83 |  |  | 68,000 |  |  | 2.83 |
|  |  |  | 4,929,617 |  |  |  |  |  | 4,657,461 |  |  |  |
Schedule of Stock-Based Compensation Expense in Statement of Operations | The following table illustrates the effect of share-based compensation on the statement of operations:
|  | Year ended December 31, |
(U.S. dollars in thousands) |  | 2015 |  | 2016 |  | 2017 |
Research and development expenses |  | $ | 904 |  | $ | 571 |  | $ | 182 |
Selling, general and administrative expenses |  |  | 898 |  |  | 417 |  |  | 155 |
|  | $ | 1,802 |  | $ | 988 |  | $ | 337 |

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