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CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($)
$ in Thousands
Common Stock [Member]
Additional paid-in Capital [Member]
Treasury shares at cost [Member]
Accumulated other comprehensive income (loss) [Member]
Accumulated deficit [Member]
Total
Balance at Dec. 31, 2016 $ 214 $ 409,320 $ (20,091) $ (7,848) $ (265,431) $ 116,164
Balance, shares at Dec. 31, 2016 77,768,929         77,768,929
Exercise of options and RSU's [1] 294 $ 294
Exercise of options and RSU's, shares 276,263          
Share-based compensation expense 1,203 1,203
Other comprehensive income, net 677 677
Net income 15,560 15,560
Balance at Dec. 31, 2017 $ 214 410,817 (20,091) (7,171) (249,871) $ 133,898
Balance, shares at Dec. 31, 2017 78,045,192         78,045,192
Exercise of options and RSU's [1] 374 $ 374
Exercise of options and RSU's, shares 325,200          
Share-based compensation expense 1,032 1,032
Other comprehensive income, net (2,196) (2,196)
Cumulative effect of accounting change 70 70
Net income 5,296 5,296
Balance at Jun. 30, 2018 $ 214 $ 412,223 $ (20,091) $ (9,367) $ (244,505) $ 138,474
Balance, shares at Jun. 30, 2018 78,370,392         78,370,392
[1] Represent an amount lower than $1.