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Equity Incentive Plans (Tables)
9 Months Ended
Sep. 30, 2020
Equity Incentive Plans  
Summary of Stock-Based Compensation Expense Recognized

Three Months Ended September 30, 

Nine Months Ended September 30, 

    

2020

    

2019

    

2020

    

2019

    

Research and development

 

$

963

$

1,670

$

3,165

$

3,197

General and administrative

 

1,564

2,209

4,984

 

4,527

Total

$

2,527

$

3,879

$

8,149

$

7,724

Summary of Total Unrecognized Stock-Based Compensation Expense, Net of Estimated Forfeitures

Unrecognized Compensation Expense

    

Average Remaining Vesting Period (Years)

Stock options

 

$

14,605

2.8

ESPP

 

$

186

0.2