Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation (Tables)

v3.21.2
Stock-based Compensation (Tables)
6 Months Ended
Jun. 30, 2021
Stock-based Compensation  
Weighted Average Assumptions

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Three Months Ended June 30, 

 

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Six Months Ended June 30, 

 

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2021

    

2020

 

    

2021

    

2020

 

Dividend yield

 

0

%  

0

%  

 

0

%  

0

%

Expected volatility

 

76

%  

100

%  

 

94

%  

100

%

Risk-free interest rate

 

1.06

%  

0.40

%  

 

0.77

%  

0.77

%

Expected term

 

6.00 years

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5.93 years

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5.68 years

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5.66 years

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Stock Option Activity

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Weighted

    

Weighted

    

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Average

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Average

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Aggregate

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Exercise

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Contractual 

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Intrinsic

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Number of

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Price

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Term

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Value

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shares

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Per Share

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(in years)

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(in thousands)

Outstanding at January 1, 2021

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​

1,827,906

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$

20.66

 

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6.31

 

$

51,401

Granted

 

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176,429

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37.62

 

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Exercised

 

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(73,575)

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13.35

 

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Forfeited, expired or cancelled

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(57,115)

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71.26

 

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Outstanding at June 30, 2021

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1,873,645

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$

21.00

 

​

6.19

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$

33,125

Exercisable at June 30, 2021

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​

1,535,686

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$

19.37

 

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5.58

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$

30,459

Stock-based Compensation Expense

The following table shows total stock-based compensation expense for stock options and ESPP in the condensed consolidated statements of operations and comprehensive loss (in thousands):

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Three Months Ended June 30, 

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Six Months Ended June 30, 

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2021

    

2020

    

2021

    

2020

Research and development

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$

—

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$

—

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$

—

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$

—

General and administrative

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768

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773

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3,666

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2,561

Total stock-based compensation expense

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$

768

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$

773

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$

3,666

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$

2,561