XML 43 R34.htm IDEA: XBRL DOCUMENT v3.22.2.2
Stock-based compensation (Tables)
9 Months Ended
Sep. 30, 2022
Stock-based compensation  
Summary of share-based compensation expense for all stock awards

Stock-based compensation expense for all stock awards consists of the following (in thousands):

​

​

​

​

​

​

​

​

​

​

​

​

​

Three Months Ended September 30, 

​

Nine Months Ended September 30, 

​

2022

    

2021

    

2022

    

2021

Cost of product revenue

$

199

​

$

96

​

$

424

​

$

282

Cost of service and other revenue

 

159

​

 

115

​

 

530

​

 

347

Research and development

 

320

​

 

440

​

 

1,200

​

 

1,248

Selling, general, and administrative

 

2,088

​

 

3,357

​

 

9,625

​

 

9,167

Total stock-based compensation

$

2,766

​

$

4,008

​

$

11,779

​

$

11,044