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SHARE CAPITAL (Tables) | 12 Months Ended
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Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Options and Restricted Stocks Granted |
| a) | Below is a table summarizing all of the options grants to employees during the year ended December 31, 2018:
Year of grant |  |  | No. of options granted |  |  | Exercise price |  |  | Vesting period |  |  | Fair value at grant (U.S. dollars in thousands) |  |  | Expiration period |
| 2018 |  |  |  | 4,000,000 |  |  | $ | 0.56 |  |  |  | 4 years |  |  | $ | 1,200 |  |  |  | 10 years |
| 2018 |  |  |  | 2,360,000 |  |  | $ | 0.51 |  |  |  | 4 years |  |  | $ | 700 |  |  |  | 10 years |
Summary of Stock Option Activity - Options Granted to Employees |
| a. | Options granted to employees:
|  | Year ended December 31, |
|  | 2016 |  |  | 2017 |  |  | 2018 |
|  |  |  |  | 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 |  |  | 6,952,293 |  |  | $ | 3.363 |  |  |  | 4,884,211 |  |  | $ | 3.617 |  |  |  | 4,729,617 |  |  | $ | 3.604 |
Changes during the year: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,360,000 |  |  |  | 0.541 |
Forfeited and Expired |  |  | 1,514,957 |  |  |  | 3.748 |  |  |  | 154,594 |  |  |  | 4.004 |  |  |  | 1,088,942 |  |  |  | 4.604 |
Exercised (*) |  |  | 553,125 |  |  |  | 0.067 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding at end of year |  |  | 4,884,211 |  |  | $ | 3.617 |  |  |  | 4,729,617 |  |  | $ | 3.604 |  |  |  | 10,000,675 |  |  | $ | 1.547 |
Exercisable at end of year |  |  | 3,498,492 |  |  | $ | 4.296 |  |  |  | 4,457,461 |  |  | $ | 3.696 |  |  |  | 3,944,863 |  |  | $ | 3.065 |
(*) The total intrinsic value of options exercised during the years ended December 31, 2016, 2017 and 2018, was approximately $213,000, $0 and $0, respectively.
Summary of Restricted Stock Activity - Options Granted to Employees |
| b. | Restricted stock granted to employees:
|  | Year ended December 31, 2016 |
|  | Number of shares of restricted stock |
Outstanding at beginning of year |  |  | 127,874 |
Changes during the year: |  |  |  |
Vested |  |  | 127,874 |
Forfeited |  |  | - |
Outstanding at end of year |  |  | - |
Schedule of Options Granted to Service Providers |
| c. | Options and restricted stocks granted to consultants, directors, and other service providers:
|  | Year ended December 31, |
|  | 2016 |  |  | 2017 |  |  | 2018 |
|  | 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 |  |  | 637,209 |  |  | $ | 11.638 |  |  |  | 208,000 |  |  | $ | 3.156 |  |  |  | 200,000 |  |  | $ | 3.282 |
Changes during the year: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expired |  |  | 429,209 |  |  |  | 15.748 |  |  |  | 8,000 |  |  |  | 0.001 |  |  |  | 50,000 |  |  |  | 3.02 |
Vested restricted stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding at end of year |  |  | 208,000 |  |  |  | 3.156 |  |  |  | 200,000 |  |  |  | 3.282 |  |  |  | 150,000 |  |  |  | 3.37 |
Exercisable at end of year |  |  | 170,500 |  |  | $ | 3.109 |  |  |  | 200,000 |  |  | $ | 3.282 |  |  |  | 150,000 |  |  | $ | 3.37 |
Schedule of Information about Share Options Outstanding |
| d. | The following tables summarize information concerning outstanding and exercisable options and restricted stock as of December 31, 2018:
December 31, 2018 |
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 |
$ | 0.51 |  |  |  | 2,360,000 |  |  |  | 9.71 |  |  |  | 147,500 |  |  |  | 9.71 |
$ | 0.56 |  |  |  | 4,000,000 |  |  |  | 9.71 |  |  |  | 250,000 |  |  |  | 9.71 |
$ | 1.720 |  |  |  | 1,623,593 |  |  |  | 6.22 |  |  |  | 1,530,281 |  |  |  | 6.22 |
$ | 2.370 |  |  |  | 900,000 |  |  |  | 5.74 |  |  |  | 900,000 |  |  |  | 5.74 |
$ | 2.650 |  |  |  | 209,082 |  |  |  | 0.15 |  |  |  | 209,082 |  |  |  | 0.15 |
$ | 3.370 |  |  |  | 150,000 |  |  |  | 5.56 |  |  |  | 150,000 |  |  |  | 5.56 |
$ | 6.900 |  |  |  | 680,000 |  |  |  | 1.15 |  |  |  | 680,000 |  |  |  | 1.15 |
$ | 7.550 |  |  |  | 160,000 |  |  |  | 0.56 |  |  |  | 160,000 |  |  |  | 0.56 |
$ | 9.660 |  |  |  | 68,000 |  |  |  | 1.83 |  |  |  | 68,000 |  |  |  | 1.83 |
|  |  |  |  | 10,150,675 |  |  |  |  |  |  |  | 4,094,863 |  |  |  |  |
Schedule of Stock-Based Compensation Expense in Statement of Operations |
| e. | The following table illustrates the effect of share-based compensation on the statement of operations:
|  | Year ended December 31, |
(U.S. dollars in thousands) |  | 2016 |  |  | 2017 |  |  | 2018 |
Research and development expenses |  | $ | 571 |  |  | $ | 182 |  |  | $ | 310 |
Selling, general and administrative expenses |  |  | 417 |  |  |  | 155 |  |  |  | 204 |
|  | $ | 988 |  |  | $ | 337 |  |  | $ | 514 |

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