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STOCKHOLDERS' EQUITY (Tables)
3 Months Ended
Mar. 31, 2020
Equity [Abstract]  
Schedule of Common Stock Reserved for Future Issuance
Common stock reserved for future issuance as of March 31, 2020 and December 31, 2019, consisted of the following.
March 31,
2020
December 31,
2019
Stock options and RSUs issued and outstanding9,009,511  6,809,257  
Stock options, RSUs and ESPP shares authorized for future issuance3,395,164  3,257,316  
Total12,404,675  10,066,573