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SHAREHOLDERS' EQUITY (Details 2) - Employee Stock Option And Restricted Stock Units Rsu [Member]
9 Months Ended
Sep. 30, 2020
$ / shares
shares
Number of shares underlying outstanding RSUs  
Unvested RSUs at the Beginning of the period | shares 62,378
Granted | shares 1,238,688
Vested | shares (44,625)
Forfeited | shares (9,126)
Unvested RSUs at the end of the period | shares 1,247,315
Weighted average grant date fair value  
Unvested RSUs at the Beginning of the period | $ / shares $ 44.61
Granted | $ / shares 0.85
Vested | $ / shares 8.86
Forfeited | $ / shares 8.46
Unvested RSUs at the end of the period | $ / shares $ 2.78