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Common Stock (Tables)
6 Months Ended
Jun. 30, 2020
Equity [Abstract]  
Schedule of Stock by Class
The Company’s common stock has been reserved for the following potential future issuances:
June 30, 2020December 31, 2019
(unaudited)
Shares underlying outstanding stock options
3,869,0024,494,889
Shares underlying unvested restricted stock units
564,008496,131
Shares available for issuance under the 2018 Incentive Award Plan2,864,5282,726,225
Shares available for issuance under the 2018 Employee Stock Purchase Plan1,574,367689,917
Total
8,871,9058,407,162