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Stockholders' Equity (Tables)
6 Months Ended
Jun. 30, 2019
Equity [Abstract]  
Schedule of Common Stock Reserved for Future Issuance

Common stock reserved for future issuance as of June 30, 2019 is as follows:

 

Issued and Outstanding:

 

 

 

 

Stock options

 

 

4,532,106

 

Warrants for common stock

 

 

67,238

 

Shares reserved for issuance under the 2017 Employee Stock

   Purchase Plan

 

 

488,405

 

Shares reserved for future award grants

 

 

346,547

 

Total

 

 

5,434,296

 

Summary of Allocation of Non-Cash Stock-Based Compensation Expense for All Stock Awards

The following table summarizes the allocation of the Company’s non-cash stock-based compensation expense for all stock awards during the three and six months ended June 30, 2019 and 2018 (in thousands):

 

 

 

Three Months Ended

June 30,

 

 

Six Months Ended

June 30,

 

 

 

2019

 

 

2018

 

 

2019

 

 

2018

 

Research and development

 

$

989

 

 

$

788

 

 

$

1,734

 

 

$

1,535

 

General and administrative

 

 

1,355

 

 

 

884

 

 

 

2,610

 

 

 

1,658

 

Total

 

$

2,344

 

 

$

1,672

 

 

$

4,344

 

 

$

3,193