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Common Stock and Preferred Stock (Tables)
12 Months Ended
Dec. 31, 2019
Equity [Abstract]  
Schedule of Stock by Class
As of December 31, 2019 and 2018, the Company had reserved for future issuance the following number of shares of common stock (in thousands):
 
December 31,
 
2019
 
2018
Shares reserved for vesting of restricted stock awards

 
7

Shares reserved for vesting of restricted stock units
460

 
371

Shares reserved for exercises of outstanding stock options
5,735

 
5,023

Shares reserved for future issuances under the 2017 Stock Option and Incentive Plan
1,288

 
1,114

Total shares reserved for future issuance
7,483

 
6,515