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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 income (loss) [Member]
Accumulated deficit [Member]
Total
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          
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)
Cumulative effect of adoption of new accounting standard 70 70
Net income 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 $ 1 255 $ 256
Exercise of options and vesting of RSU's, shares 140,475          
Share-based compensation expense 1,172 1,172
Other comprehensive income (loss), net 1,192 1,192
Net income 1,571 1,571
Balance at Jun. 30, 2019 $ 215 $ 416,835 $ (20,091) $ (8,016) $ (225,184) $ 163,759
Balance, shares at Jun. 30, 2019 80,230,133         80,230,133
[1] Represent an amount lower than $1.