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CONSOLIDATED STATEMENT OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands | Ordinary shares [Member] | Additional paid-in capital [Member] | Capital notes [Member] | Unearned compensation [Member] | Accumulated other comprehensive income (loss) [Member] | Foreign currency translation adjustments [Member] | Accumulated deficit [Member] | Treasury stock [Member] | Comprehensive income (loss) [Member] | Noncontrolling interest [Member] | Total
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
BALANCE at Dec. 31, 2014 | $ 235,117 | $ 1,137,946 | $ 60,704 | $ 50,017 | $ (376) | $ (25,350) | $ (1,244,007) | $ (9,072) |  | $ (9,418) | $ 195,561
BALANCE, SHARES at Dec. 31, 2014 | 58,120,000 |  |  |  |  |  |  |  |  |  |
Conversion of debentures and exercise of warrants into share capital | $ 79,443 | 126,989 |  |  |  |  |  |  |  |  | 206,432
Conversion of debentures and exercise of warrants into share capital, shares | 20,904,000 |  |  |  |  |  |  |  |  |  |
Exercise of options | $ 6,261 | 1,730 |  |  |  |  |  |  |  |  | $ 7,991
Exercise of options, shares | 1,620,000 |  |  |  |  |  |  |  |  |  | 1,620,056
Capital notes converted into share capital | $ 5,751 | 6,400 | (12,151) |  |  |  |  |  |  |  |
Capital notes converted into share capital, shares | 1,500,000 |  |  |  |  |  |  |  |  |  |
Employee stock-based compensation |  |  |  | 8,192 |  |  |  |  |  |  | 8,192
Stock-based compensation related to the Facility Agreement with the Banks |  | 480 |  |  |  |  |  |  |  |  | 480
Dividend paid to Panasonic |  |  |  |  |  |  |  |  |  | (1,570) | (1,570)
Other comprehensive income (loss): |  |  |  |  |  |  |  |  |  |  |
Profit (loss) |  |  |  |  |  |  | (29,647) |  | $ (29,647) | 520 | (29,127)
Foreign currency translation adjustments |  |  |  |  |  | (1,196) |  |  | (1,196) | (1,289) | (2,485)
Change in employees plan assets and benefit obligations |  |  |  |  | 176 |  |  |  | 176 |  | 176
Unrealized gain (loss) on derivatives |  |  |  |  | (64) |  |  |  | (64) |  | (64)
Comprehensive loss |  |  |  |  |  |  |  |  | (30,731) |  | (30,731)
BALANCE at Dec. 31, 2015 | $ 326,572 | 1,273,545 | 48,553 | 58,209 | (264) | (26,546) | (1,273,654) | (9,072) |  | (11,757) | 385,586
BALANCE, SHARES at Dec. 31, 2015 | 82,144,000 |  |  |  |  |  |  |  |  |  |
Issuance of shares | $ 12,504 | 27,496 |  |  |  |  |  |  |  |  | 40,000
Issuance of shares, shares | 3,297,000 |  |  |  |  |  |  |  |  |  |
Conversion of debentures and exercise of warrants into share capital | $ 12,069 | 10,223 |  |  |  |  |  |  |  |  | 22,292
Conversion of debentures and exercise of warrants into share capital, shares | 3,080,000 |  |  |  |  |  |  |  |  |  |
Exercise of options | $ 14,412 | 3,192 |  |  |  |  |  |  |  |  | $ 17,604
Exercise of options, shares | 3,650,000 |  |  |  |  |  |  |  |  |  | 3,649,754
Capital notes converted into share capital | $ 3,500 | 3,789 | (7,289) |  |  |  |  |  |  |  |
Capital notes converted into share capital, shares | 900,000 |  |  |  |  |  |  |  |  |  |
Employee stock-based compensation |  |  |  | 9,406 |  |  |  |  |  |  | 9,406
Stock-based compensation related to the Facility Agreement with the Banks |  | 480 |  |  |  |  |  |  |  |  | 480
Dividend paid to Panasonic |  |  |  |  |  |  |  |  |  | (2,563) | (2,563)
Accumulated amount due to adoption of ASU No. 2016-09, Compensation - Stock Compensation (Topic 718) |  |  |  | 1,306 |  |  | (1,306) |  |  |  |
Other comprehensive income (loss): |  |  |  |  |  |  |  |  |  |  |
Profit (loss) |  |  |  |  |  |  | 203,924 |  | 203,924 | 5,242 | 209,166
Foreign currency translation adjustments |  |  |  |  |  | (737) |  |  | (737) | 1,660 | 923
Change in employees plan assets and benefit obligations |  |  |  |  | (546) |  |  |  | (546) |  | (546)
Unrealized gain (loss) on derivatives |  |  |  |  | 266 |  |  |  | 266 |  | 266
Comprehensive loss |  |  |  |  |  |  |  |  | 202,907 |  | 202,907
BALANCE at Dec. 31, 2016 | $ 369,057 | 1,318,725 | 41,264 | 68,921 | (544) | (27,283) | (1,071,036) | (9,072) |  | (7,418) | 682,614
BALANCE, SHARES at Dec. 31, 2016 | 93,071,000 |  |  |  |  |  |  |  |  |  |
Issuance of shares | $ 12,128 | 4,247 |  |  |  |  |  |  |  |  | 16,375
Issuance of shares, shares | 2,914,000 |  |  |  |  |  |  |  |  |  |
Conversion of debentures and exercise of warrants into share capital |  |  |  |  |  |  |  |  |  |  |
Conversion of debentures and exercise of warrants into share capital, shares |  |  |  |  |  |  |  |  |  |  |
Exercise of options | $ 6,750 | 8,180 |  |  |  |  |  |  |  |  | $ 14,930
Exercise of options, shares | 1,629,000 |  |  |  |  |  |  |  |  |  | 1,611,489
Capital notes converted into share capital | $ 3,792 | 16,714 | (20,506) |  |  |  |  |  |  |  |
Capital notes converted into share capital, shares | 930,000 |  |  |  |  |  |  |  |  |  |
Employee stock-based compensation |  |  |  | 11,644 |  |  |  |  |  |  | 11,644
Stock-based compensation related to the Facility Agreement with the Banks |  |  |  |  |  |  |  |  |  |  |
Dividend paid to Panasonic |  |  |  |  |  |  |  |  |  | (5,501) | (5,501)
Other comprehensive income (loss): |  |  |  |  |  |  |  |  |  |  |
Profit (loss) |  |  |  |  |  |  | 298,011 |  | 298,011 | 3,645 | 301,656
Foreign currency translation adjustments |  |  |  |  |  | 2,761 |  |  | 2,761 | 2,920 | 5,681
Change in employees plan assets and benefit obligations |  |  |  |  | 511 |  |  |  | 511 |  | 511
Unrealized gain (loss) on derivatives |  |  |  |  | 1,796 |  |  |  | 1,796 |  | 1,796
Comprehensive loss |  |  |  |  |  |  |  |  | $ 303,079 |  | 303,079
BALANCE at Dec. 31, 2017 | $ 391,727 | $ 1,347,866 | $ 20,758 | $ 80,565 | $ 1,763 | $ (24,522) | $ (773,025) | $ (9,072) |  | $ (6,354) | $ 1,029,706
BALANCE, SHARES at Dec. 31, 2017 | 98,544,000 |  |  |  |  |  |  |  |  |  |
OUTSTANDING SHARES, NET OF TREASURY STOCK AS OF DECEMBER 31, 2017 at Dec. 31, 2017 | 98,458,000 |  |  |  |  |  |  |  |  |  |

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