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Common Stock and Preferred Stock (Tables)
3 Months Ended
Mar. 31, 2020
Equity [Abstract]  
Schedule of Stock by Class
As of March 31, 2020 and December 31, 2019, the Company had reserved for future issuance the following number of shares of common stock (in thousands):
 
March 31,
 
December 31,
 
2020
 
2019
Shares reserved for vesting of restricted stock units
760

 
460

Shares reserved for exercises of outstanding stock options
6,643

 
5,735

Shares reserved for future issuance under the 2017 Stock Option and Incentive Plan
1,320

 
1,288

Total shares reserved for future issuance
8,723

 
7,483