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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 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          
Exercise of options and vesting of RSU's [1] 294 294
Exercise of options and vesting of RSU's, shares 276,263          
Share-based compensation expense 1,203 1,203
Other comprehensive income (loss), net 677 677
Net income (loss) 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
Cumulative effect of the new revenue recognition standard 70 $ 70
Exercise of options and vesting of RSU's [1] 2,611 2,611
Exercise of options and vesting of RSU's, shares 2,044,466          
Share-based compensation expense 1,980 1,980
Other comprehensive income (loss), net (2,037) (2,037)
Net income (loss) 23,046 23,046
Balance at Dec. 31, 2018 $ 214 415,408 (20,091) (9,208) (226,755) $ 159,568
Balance, shares at Dec. 31, 2018 80,089,658         80,089,658
Exercise of options and vesting of RSU's $ 1 601 $ 602
Exercise of options and vesting of RSU's, shares 573,147         422,311
Share-based compensation expense 2,053 $ 2,053
Other comprehensive income (loss), net 542 542
Net income (loss) (2,344) (2,344)
Balance at Dec. 31, 2019 $ 215 $ 418,062 $ (20,091) $ (8,666) $ (229,099) $ 160,421
Balance, shares at Dec. 31, 2019 80,662,805         80,662,805
[1] Represent an amount lower than $1