Quarterly report pursuant to Section 13 or 15(d)

STOCK-BASED COMPENSATION (Tables)

v3.22.1
STOCK-BASED COMPENSATION (Tables)
3 Months Ended
Mar. 31, 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 March 31, 

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2022

    

2021

Selling, general and administrative

​

$

2,739

​

$

2,053

Research and development

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​

468

​

​

586

Total stock-based compensation expense

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$

3,207

​

$

2,639

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 March 31, 

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2022

    

2021

    

Risk-free interest rate

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1.7

%  

1.0

%  

Expected term (in years)

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6.4

​

6.5

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Dividend yield

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0.0

%  

0.0

%  

Expected volatility

​

70.0

%  

70.6

%