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Redeemable Convertible Preferred Stock and Common Stock (Tables)
9 Months Ended
Sep. 30, 2019
Text Block [Abstract]  
Summary of Common Stock Reserved for Future Issuance

At September 30, 2019 and December 31, 2018, the Company has reserved the following shares of common stock for future issuance:

 

 

 

September 30,

2019

 

 

December 31,

2018

 

Shares reserved for vesting of restricted stock awards

 

 

63,313

 

 

 

153,276

 

Shares reserved for exercise of outstanding stock options

 

 

3,145,428

 

 

 

2,164,101

 

Shares reserved for issuance under the 2018 Stock Option

   and Grant Plan

 

 

474,326

 

 

 

385,561

 

Shares reserved for issuance under the 2018 Employee Stock

   Purchase Plan

 

 

461,266

 

 

 

223,200

 

Total shares of authorized common stock reserved for future

   issuance

 

 

4,144,333

 

 

 

2,926,138