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Accrued Liabilities
12 Months Ended
Dec. 31, 2021
Payables and Accruals [Abstract]  
Accrued Liabilities

6. Accrued Liabilities

 

Accrued liabilities consisted of the following (in thousands):

 Schedule of Accrued Liabilities

   2021   2020 
   Years Ended December 31, 
   2021   2020 
Payroll and related expenses  $724   $600 
Other   426    309 
Total accrued liabilities  $1,150   $909