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Common Stock (Tables)
3 Months Ended
Mar. 31, 2020
Equity [Abstract]  
Schedule of Stock by Class
The Company’s common stock has been reserved for the following potential future issuances:
 
March 31, 2020
 
December 31, 2019
 
(unaudited)

 
 
Shares underlying outstanding stock options
4,227,990

 
4,494,889

Shares underlying unvested restricted stock units
488,921

 
496,131

Shares available for issuance under the 2018 Incentive Award Plan
6,422,345

 
2,726,225

Shares available for issuance under the 2018 Employee Stock Purchase Plan
1,632,531

 
689,917

Total
12,771,787
 
8,407,162