Annual report pursuant to Section 13 and 15(d)

Stock Based Compensation (Tables)

v3.22.0.1
Stock Based Compensation (Tables)
12 Months Ended
Dec. 31, 2021
Stock Based Compensation  
Weighted Average Assumptions

The fair value of stock options granted during the years ended December 31, 2021 and 2020, was estimated based on the following weighted average assumptions for:

​

​

​

​

​

​

​

​

​

Year Ended December 31, 

 

​

    

2021

    

2020

 

Dividend yield

 

0

%  

0

%

Expected volatility

 

83

%  

100

%

Risk-free interest rate

 

0.95

%  

0.72

%

Expected term

 

5.66 years

​

5.64 years

​

Stock Option Activity

The following table summarizes the Company’s stock option activity for the year ended December 31, 2021.

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

As of December 31, 2021

​

​

​

​

Weighted

    

Weighted

​

​

​

​

​

​

Average

​

Average

​

Aggregate

​

​

​

​

Exercise

​

Contractual 

​

Intrinsic

​

​

Number of

​

Price

​

Term

​

Value

​

​

shares

​

Per Share

​

(in years)

​

(in thousands)

Outstanding at January 1, 2021

​

​

1,827,906

​

$

20.66

 

​

6.31

 

$

51,401

Granted

 

​

325,211

​

 

32.02

 

​

  

 

​

  

Exercised

 

​

(77,305)

​

 

13.61

 

​

  

 

​

  

Forfeited, expired or cancelled

​

​

(164,635)

​

 

46.59

 

​

  

 

​

  

Outstanding at December 31, 2021

​

​

1,911,177

​

$

20.64

 

​

6.33

​

$

15,103

Exercisable at December 31, 2021

​

​

1,553,696

​

$

18.75

 

​

5.69

​

$

14,894

​

Stock-based Compensation Expense

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

​

​

​

​

​

​

​

​

​

​

Year Ended December 31, 

​

    

2021

    

2020

Research and development

​

$

—

​

$

—

General and administrative

​

 

6,195

​

 

3,961

Total stock-based compensation expense

​

$

6,195

​

$

3,961