Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation (Tables)

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

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Three Months Ended September 30, 

 

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Nine Months Ended September 30, 

 

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2021

    

2020 (1)

 

    

2021

    

2020

 

Dividend yield

 

0

%  

n/a

​

 

0

%  

0

%

Expected volatility

 

71

%  

n/a

​

 

90

%  

100

%

Risk-free interest rate

 

0.85

%  

n/a

​

 

0.79

%  

0.77

%

Expected term

 

5.61 years

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n/a

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5.67 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

 

​

6.31

 

$

51,401

Granted

 

​

213,711

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36.32

 

​

  

 

​

  

Exercised

 

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(74,805)

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13.54

 

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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 September 30, 2021

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​

1,909,697

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$

21.18

 

​

6.02

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$

20,077

Exercisable at September 30, 2021

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​

1,595,665

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$

19.53

 

​

5.45

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$

19,276

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 September 30, 

​

Nine Months Ended September 30, 

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2021

    

2020

    

2021

    

2020

Research and development

​

$

—

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$

—

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$

—

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$

—

General and administrative

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779

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708

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4,445

​

 

3,269

Total stock-based compensation expense

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$

779

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$

708

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$

4,445

​

$

3,269