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SHAREHOLDERS' EQUITY (Tables) | 12 Months Ended
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Dec. 31, 2014
SHAREHOLDERS' EQUITY [Abstract] |
Schedule of Share Option Activity |
|  | 2014 |  |  | 2013 |  |  | 2012 |
|  | Number of share options |  |  | Weighted average exercise price |  |  | Number of share options |  |  | Weighted average exercise price |  |  | Number of share options |  |  | Weighted average exercise price |
Outstanding as of beginning of year |  |  | 8,066,749 |  |  | $ | 6.31 |  |  |  | 4,351,487 |  |  | $ | 15.21 |  |  |  | 4,483,793 |  |  | $ | 14.97 |
Granted |  |  | 746,431 |  |  |  | 5.81 |  |  |  | 5,402,961 |  |  |  | 4.54 |  |  |  | 30,336 |  |  |  | 12.64 |
Exercised |  |  | (762,607 | ) |  |  | 4.36 |  |  |  | (23,932 | ) |  |  | 4.35 |  |  |  | (125,260 | ) |  |  | 4.36 |
Terminated |  |  | (30,901 | ) |  |  | 35.40 |  |  |  | (4,273 | ) |  |  | 52.79 |  |  |  | (411 | ) |  |  | 63.57 |
Forfeited |  |  | (482,453 | ) |  |  | 5.86 |  |  |  | (1,659,494 | ) |  |  | 23.76 |  |  |  | (36,971 | ) |  |  | 20.23 |
Outstanding as of end of year |  |  | 7,537,219 |  |  |  | 6.37 |  |  |  | 8,066,749 |  |  |  | 6.31 |  |  |  | 4,351,487 |  |  |  | 15.21 |
Options exercisable as of end of year |  |  | 1,834,281 |  |  | $ | 11.54 |  |  |  | 2,419,180 |  |  | $ | 9.03 |  |  |  | 3,553,662 |  |  | $ | 14.28 |
Schedule of Information about Share Options Outstanding |
Outstanding as of December 31, 2014 |  |  | Exercisable as of December 31, 2014 |
Range of exercise Prices |  |  | Number outstanding |  |  | Weighted average remaining contractual life (in years) |  |  | Weighted average exercise price |  |  | Number exercisable |  |  | Weighted average exercise price |
$ | 3.15 |  |  |  | 10,000 |  |  |  | 5.25 |  |  | $ | 3.15 |  |  |  | 10,000 |  |  | $ | 3.15 |
| 4.35-13.20 |  |  |  | 6,733,734 |  |  |  | 5.27 |  |  |  | 4.81 |  |  |  | 1,030,796 |  |  |  | 5.39 |
| 15.90-20.85 |  |  |  | 418,202 |  |  |  | 3.34 |  |  |  | 16.85 |  |  |  | 418,202 |  |  |  | 16.85 |
$ | 21.00-32.25 |  |  |  | 375,283 |  |  |  | 2.37 |  |  | $ | 22.76 |  |  |  | 375,283 |  |  | $ | 22.76 |
|  |  |  |  | 7,537,219 |  |  |  |  |  |  |  |  |  |  |  | 1,834,281 |  |  |  |  |
Schedule of Intrinsic and Fair Values for Options Exercised |
|  |  | Year Ended December 31, |
|  |  | 2014 |  |  | 2013 |  |  | 2012 |
| The intrinsic value of options exercised |  | $ | 3,680 |  |  | $ | 42 |  |  | $ | 927 |
| The original fair value of options exercised |  | $ | 2,661 |  |  | $ | 158 |  |  | $ | 819 |
Schedule of Stock-Based Compensation Expense in Statement of Operations |
|  |  | Year Ended December 31, |
|  |  | 2014 |  |  | 2013 |  |  | 2012 |
| Component of income before provision for income taxes: |
| Cost of revenue |  | $ | 753 |  |  | $ | 597 |  |  | $ | 902 |
| Research and development, net |  |  | 1,034 |  |  |  | 527 |  |  |  | 714 |
| Selling, general and administrative |  |  | 2,897 |  |  |  | 1,658 |  |  |  | 4,121 |
| Stock-based compensation expense |  | $ | 4,684 |  |  | $ | 2,782 |  |  | $ | 5,737 |
Schedule of Fair Value of Options Granted |
|  |  | 2014 |  |  | 2013 |  |  | 2012 |
| Risk-free interest rate |  | 1.3%-1.8% |  |  | 0.8%-1.8% |  |  | 0.6%-1.0% |
| Expected life of options |  | 4.75 years |  |  | 4.75 years |  |  | 4.75 years |
| Expected annual volatility |  | 47%-57% |  |  | 51%-65% |  |  | 52%-55% |
| Expected dividend yield |  | None |  |  | None |  |  | None |

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