Annual report pursuant to Section 13 and 15(d)

Compensation and Other Benefit Plans (Tables)

v3.20.4
Compensation and Other Benefit Plans (Tables)
12 Months Ended
Dec. 31, 2020
Compensation and Other Benefit Plans  
Stock Option Activity

The following table summarizes the Company’s stock option activity for the year ended December 31, 2020.

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As of December 31, 2020

​

    

​

    

Weighted

    

Weighted

    

Aggregate

​

​

​

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Average

​

Average

​

Intrinsic

​

​

​

​

Exercise

​

Contractual 

​

Value

​

​

Number of

​

Price

​

Term

​

(in

​

​

shares

​

Per Share

​

(in years)

​

thousands)

Outstanding at January 1, 2020

 

1,839,623

​

$

20.42

 

6.88

 

$

26,829

Granted

 

218,311

​

 

23.99

 

  

 

​

  

Exercised

 

(211,373)

​

 

11.39

 

  

 

​

  

Forfeited, expired or cancelled

 

(18,655)

​

 

141.47

 

  

 

​

  

Outstanding at December 31, 2020

 

1,827,906

​

$

20.66

 

6.31

​

$

51,401

Exercisable at December 31, 2020

 

1,516,104

​

$

20.70

 

5.80

​

$

44,020

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Weighted Average Assumptions

The fair value of stock options granted during the years ended December 31, 2020 and 2019, was estimated based on the following weighted average assumptions for:

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Year Ended December 31, 

 

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2020

    

2019

 

Dividend yield

 

0

%  

0

%

Expected volatility

 

100

%  

102

%

Risk-free interest rate

 

0.72

%  

2.42

%

Expected term

 

5.64 years

​

5.62 years

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Stock-based Compensation Expense

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

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Year Ended December 31, 

​

    

2020

    

2019

Research and development

​

$

—

​

$

204

General and administrative

​

 

3,961

​

 

4,744

Total stock-based compensation expense

​

$

3,961

​

$

4,948