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CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Thousands | Ordinary shares [Member] | Additional paid-in capital [Member] | Accumulated other comprehensive income (loss) [Member] | Accumulated deficit [Member] | Total
--- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2013 | $ 1,932 | $ 873,045 | $ 1,591 | $ (650,535) | $ 226,033
Balance, shares at Dec. 31, 2013 | 42,125,774 |  |  |  |
Issuance of restricted share units (RSU) | $ 19 |  |  |  | 19
Issuance of restricted share units (RSU), shares | 332,650 |  |  |  |
Stock-based compensation of options and RSUs |  | 2,427 |  |  | 2,427
Exercise of stock options | $ 15 | 1,152 |  |  | 1,167
Exercise of stock options, shares | 272,000 |  |  |  |
Comprehensive income (loss) |  |  | (3,011) | (1,496) | (4,507)
Balance at Dec. 31, 2014 | $ 1,966 | 876,624 | (1,420) | (652,031) | $ 225,139
Balance, shares at Dec. 31, 2014 | 42,730,424 |  |  |  | 42,730,424
Issuance of restricted share units (RSU) | $ 14 |  |  |  | $ 14
Issuance of restricted share units (RSU), shares | 283,175 |  |  |  |
Stock-based compensation of options and RSUs |  | 1,901 |  |  | 1,901
Exercise of stock options | $ 68 | 5,601 |  |  | 5,669
Exercise of stock options, shares | 1,319,448 |  |  |  |
Comprehensive income (loss) |  |  | (2,307) | (52,334) | (54,641)
Balance at Dec. 31, 2015 | $ 2,048 | 884,126 | (3,727) | (704,365) | $ 178,082
Balance, shares at Dec. 31, 2015 | 44,333,047 |  |  |  | 44,333,047
Issuance of shares in a rights offering, net of issuance costs | $ 525 | 34,560 |  |  | $ 35,085
Issuance of shares in a rights offering, net of issuance costs, shares | 9,874,170 |  |  |  |
Issuance of restricted share units (RSU) | $ 11 |  |  |  | 11
Issuance of restricted share units (RSU), shares | 214,350 |  |  |  |
Stock-based compensation of options and RSUs |  | 908 |  |  | 908
Exercise of stock options | $ 9 | 568 |  |  | 577
Exercise of stock options, shares | 171,100 |  |  |  |
Comprehensive income (loss) |  |  | 503 | (5,340) | (4,837)
Balance at Dec. 31, 2016 | $ 2,593 | $ 920,162 | $ (3,224) | $ (709,705) | $ 209,826
Balance, shares at Dec. 31, 2016 | 54,592,667 |  |  |  | 54,592,667

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