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Accrued liabilities
12 Months Ended
Dec. 31, 2021
Accrued liabilities [Abstract]  
Accrued liabilities
7. Accrued liabilities

The components of accrued liabilities are:

 
December 31,
 
(In thousands)
 
2021
   
2020
 
Salaries and compensation related
 
$
2,854
   
$
2,328
 
Warranty
   
79
     
112
 
Professional and consulting
   
285
     
257
 
Other
   
676
     
968
 
   
$
3,894
   
$
3,665