Quarterly report pursuant to Section 13 or 15(d)

STOCK-BASED COMPENSATION (Tables)

v3.22.2
STOCK-BASED COMPENSATION (Tables)
6 Months Ended
Jun. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of stock-based compensation

Stock-based compensation for the periods presented was as follows (in thousands):

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Three Months Ended June 30, 

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Six Months Ended June 30, 

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​

2022

    

2021

​

2022

    

2021

Selling, general and administrative

​

$

1,933

​

$

1,772

​

$

4,672

​

$

3,825

Research and development

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​

458

​

​

534

​

​

926

​

​

1,120

Total stock-based compensation expense

​

$

2,391

​

$

2,306

​

$

5,598

​

$

4,945

Employee stock options  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summary of weighted-average assumptions relating to options granted pursuant to equity incentive plans

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Three Months Ended June 30, 

Six Months Ended June 30, 

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2022

    

2021

    

    

2022

    

2021

 

Risk-free interest rate

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2.9

%  

1.3

%  

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1.9

%  

1.0

%

Expected term (in years)

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6.5

​

6.6

​

​

6.5

​

6.5

​

Dividend yield

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0.0

%  

0.0

%  

​

0.0

%  

0.0

%

Expected volatility

​

70.3

%  

70.5

%  

​

70.0

%  

70.6

%