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Shareholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2018
Stockholders' Equity Note [Abstract] |
Schedule of stock option activity and related information |
|  | 2018 |  |  | 2017 |  |  | 2016 |
|  | Number of options |  |  | Weighted- average exercise price |  |  | Number of options |  |  | Weighted average exercise price |  |  | Number of options |  |  | Weighted- average exercise price |
Outstanding - beginning of year |  |  | 314,125 |  |  | $ | 3.39 |  |  |  | 252,670 |  |  | $ | 6.21 |  |  |  | 238,894 |  |  | $ | 6.65 |
Changes during the year: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted |  |  | 108,000 |  |  | $ | 2.39 |  |  |  | 75,000 |  |  | $ | 2.13 |  |  |  | 30,000 |  |  | $ | 2.13 |
Exercised |  |  | - |  |  | $ | - |  |  |  | - |  |  | $ | - |  |  |  | (10,000 | ) |  | $ | 2.96 |
Forfeited |  |  | (101,250 | ) |  | $ | 4.85 |  |  |  | (13,545 | ) |  | $ | 49.09 |  |  |  | (6,224 | ) |  | $ | 8.56 |
Outstanding - year end |  |  | 320,875 |  |  | $ | 2.59 |  |  |  | 314,125 |  |  | $ | 3.39 |  |  |  | 252,670 |  |  | $ | 6.21 |
Vested and expected to vest |  |  | 167,874 |  |  | $ | 2.90 |  |  |  | 192,584 |  |  | $ | 4.10 |  |  |  | 154,333 |  |  | $ | 8.44 |
Exercisable at year end |  |  | 157,874 |  |  | $ | 2.89 |  |  |  | 182,584 |  |  | $ | 4.17 |  |  |  | 144,333 |  |  | $ | 8.82 |
Schedule of options granted to employees and directors |
Exercise Price |  | Options outstanding as of December 31, 2018 |  |  | Weighted average remaining contractual life (years) |  |  | Options exercisable as of December 31, 2018 |  |  | Weighted average Remaining Contractual life of options exercisable (years) |
2.126 |  |  | 30,000 |  |  |  | 2.86 |  |  |  | 20,001 |  |  |  | 2.86 |
2.131 |  |  | 67,500 |  |  |  | 3.93 |  |  |  | 22,498 |  |  |  | 3.93 |
2.237 |  |  | 26,625 |  |  |  | 1.81 |  |  |  | 26,625 |  |  |  | 1.81 |
2.388 |  |  | 108,000 |  |  |  | 4.25 |  |  |  | - |  |  |  | - |
2.96 |  |  | 73,000 |  |  |  | 1.45 |  |  |  | 73,000 |  |  |  | 1.45 |
3.88 |  |  | 375 |  |  |  | 0.88 |  |  |  | 375 |  |  |  | 0.88 |
4.02 |  |  | 5,000 |  |  |  | 0.54 |  |  |  | 5,000 |  |  |  | 0.54 |
6.67 |  |  | 10,000 |  |  |  | 0.28 |  |  |  | 10,000 |  |  |  | 0.28 |
6.67 |  |  | 375 |  |  |  | 0.28 |  |  |  | 375 |  |  |  | 0.28 |
Grand Total |  |  | 320,875 |  |  |  | 3.02 |  |  |  | 157,874 |  |  |  | 1.93 |

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