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STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($)
$ in Thousands
Ordinary shares [Member]
Additional paid-in capital [Member]
Accumulated deficit [Member]
Total
Balance at Dec. 31, 2019 $ 187 $ 396,312 $ (358,178) $ 38,321
Balance, shares at Dec. 31, 2019 67,922,836      
Options exercised $ 9 15,906   15,915
Options exercised, shares 3,070,542      
Issuance of shares and warrants, net $ 24 74,123   74,147
Issuance of shares and warrants, net, shares 8,816,339      
Warrants exercised $ 11 18,314   18,325
Warrants exercised, shares 3,866,139      
Stock-based compensation relating to options issued to employees, directors and non employees   2,772   2,772
Net loss     (29,698) (29,698)
Balance at Dec. 31, 2020 $ 231 507,427 (387,876) 119,782
Balance, shares at Dec. 31, 2020 83,675,856      
Exercise of options and ESPP shares $ 1 1,454   1,455
Exercise of options and ESPP shares, shares 335,204      
Warrants exercised 425   425
Warrants exercised, shares 89,557      
Issuance of shares, net $ 7 14,951   14,958
Issuance of shares, net, shares 2,332,815      
Stock-based compensation relating to options issued to employees, directors and non employees   4,276   4,276
Net loss     (34,203) (34,203)
Balance at Dec. 31, 2021 $ 239 528,533 (422,079) $ 106,693
Balance, shares at Dec. 31, 2021 86,433,432     86,433,432
Exercise of options and ESPP shares $ 1 352   $ 353
Exercise of options and ESPP shares, shares 191,211      
Stock-based compensation relating to options issued to employees, directors and non employees   4,328   4,328
Net loss     (33,694) (33,694)
Balance at Dec. 31, 2022 $ 240 $ 533,213 $ (455,773) $ 77,680
Balance, shares at Dec. 31, 2022 86,624,643     86,624,643