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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, 2018 $ 214 $ 415,408 $ (20,091) $ (9,208) $ (226,755) $ 159,568
Balance, shares at Dec. 31, 2018 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          
Share-based compensation expense   2,053       2,053
Other comprehensive income loss, net       542   542
Net 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          
Cumulative effect of adoption of ASU Topic 326         (700) (700)
Exercise of options and vesting of RSU's $ 3 1,234       1,237
Exercise of options and vesting of RSU's, shares 1,040,561          
Share-based compensation expense   1,662       1,662
Other comprehensive income loss, net       598   598
Net loss         (17,092) (17,092)
Balance at Dec. 31, 2020 $ 218 420,958 (20,091) (8,068) (246,891) $ 146,126
Balance, shares at Dec. 31, 2020 81,703,366         81,703,366
Cumulative effect of adoption of ASU Topic 326          
Exercise of options and vesting of RSU's $ 6 4,724       4,730
Exercise of options and vesting of RSU's, shares 2,228,230          
Share-based compensation expense   2,562       2,562
Other comprehensive income loss, net       (1,439)   (1,439)
Net loss         (14,828) (14,828)
Balance at Dec. 31, 2021 $ 224 $ 428,244 $ (20,091) $ (9,507) $ (261,719) $ 137,151
Balance, shares at Dec. 31, 2021 83,931,596         83,931,596