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STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($)
$ in Thousands
Ordinary shares [Member]
Additional paid-in capital [Member]
Accumulated other comprehensive Income [Member]
Accumulated deficit [Member]
Total
Balance at Dec. 31, 2016 $ 140 $ 334,337 $ 7 $ (270,965) $ 63,519
Balance, shares at Dec. 31, 2016 51,131,534        
Options exercised [1] 201 201
Options exercised, shares 161,536        
Stock-based compensation relating to options issued to employees, directors and non-employees 2,633 2,633
Changes in other comprehensive income (loss) from foreign currency derivative contracts 10 10
Cumulative effect adjustment from adoption of ASU 2016-09 211 (211)
Net loss (37,066) (37,066)
Balance at Dec. 31, 2017 $ 140 337,382 17 (308,242) $ 29,297
Balance, shares at Dec. 31, 2017 51,293,070       51,293,070
Options exercised $ 2 683 $ 685
Options exercised, shares 765,420        
Issuance of shares and warrants, net $ 22 27,689 27,711
Issuance of shares and warrants, net, shares 7,791,294        
Stock-based compensation relating to options issued to employees, directors and non-employees 2,166 2,166
Changes in other comprehensive income (loss) from foreign currency derivative contracts (17) (17)
Net loss (22,599) (22,599)
Balance at Dec. 31, 2018 $ 164 367,920 (330,841) $ 37,243
Balance, shares at Dec. 31, 2018 59,849,784       59,849,784
Options exercised $ 3 3,246 $ 3,249
Options exercised, shares 878,378        
Issuance of shares, net $ 20 22,738 22,758
Issuance of shares, net, shares 7,194,674        
Stock-based compensation relating to options issued to employees, directors and non-employees 2,408 2,408
Net loss (27,337) (27,337)
Balance at Dec. 31, 2019 $ 187 $ 396,312 $ (358,178) $ 38,321
Balance, shares at Dec. 31, 2019 67,922,836       67,922,836
[1] Represent less than $1.