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Equity (Tables) | 12 Months Ended
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Dec. 31, 2018
Equity [Abstract] |
Summary of employee option activity under the 2007 Plan |
|  | Number of options |  |  | Weighted average exercise price |  |  | Weighted average remaining contractual term (in years) |  |  | Aggregate intrinsic value |
Outstanding at January 1, 2018 |  |  | 309,309 |  |  | $ | 4.38 |  |  |  | 3.97 |  |  | $ | 1,237 |
Granted |  |  | 37,500 |  |  | $ | - |  |  |  |  |  |  |  |  |
Exercised |  |  | (104,167 | ) |  | $ | 2.99 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (21,875 | ) |  | $ | 6.89 |  |  |  |  |  |  |  |  |
Outstanding at December 31, 2018 |  |  | 220,767 |  |  | $ | 3.83 |  |  |  | 3.81 |  |  | $ | 1,684 |
Exercisable at December 31, 2018 |  |  | 190,767 |  |  | $ | 4.43 |  |  |  | 2.92 |  |  | $ | 1,456 |
Schedule of options outstanding |
Exercise price |  | Options outstanding |  |  | Weighted average remaining contractual life (years) |  |  | Weighted average exercise price |  |  | Options exercisable |  |  | Weighted average exercise price of exercisable options |
In $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
0-1 |  |  | 30,000 |  |  |  | 9.49 |  |  | $ | - |  |  |  | - |  |  | $ | - |
2.01-3 |  |  | 66,000 |  |  |  | 1.26 |  |  | $ | 2.32 |  |  |  | 66,000 |  |  | $ | 2.32 |
3.01-4 |  |  | 73,517 |  |  |  | 2.77 |  |  | $ | 4.00 |  |  |  | 73,517 |  |  | $ | 4.00 |
5.01-6 |  |  | 6,250 |  |  |  | 4.61 |  |  | $ | 6.00 |  |  |  | 6,250 |  |  | $ | 6.00 |
8.01-9 |  |  | 45,000 |  |  |  | 5.35 |  |  | $ | 8.01 |  |  |  | 45,000 |  |  | $ | 8.01 |
|  |  | 220,767 |  |  |  | 3.81 |  |  | $ | 3.83 |  |  |  | 190,767 |  |  | $ | 4.43 |
Schedule of accumulated other comprehensive income (loss) |
|  | December 31, |
|  | 2016 |  |  | 2017 |  |  | 2018 |
Accumulated realized and unrealized gain (loss) on available-for-sale securities, net |  | $ | 40 |  |  | $ | (58 | ) |  | $ | (94 | )
Accumulated foreign currency translation adjustments |  |  | (7,494 | ) |  |  | 115 |  |  |  | (6,057 | )
Accumulated unrealized gain on derivative instruments, net |  |  | 26 |  |  |  | 26 |  |  |  | 26 |
Total other comprehensive income (loss) |  | $ | (7,428 | ) |  | $ | 83 |  |  | $ | (6,125 | )

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