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Accrued Liabilities (Tables)
 12 Months Ended
Dec. 31, 2021
Accrued Liabilities [Abstract]  
Schedule of Accrued Liabilities
Accrued liabilities were as follow (in thousands):
December 31,
20212020
Salaries, employee benefits and related taxes$2,034 $1,716 
Operating lease liabilities - current229 370 
Other326 400 
$2,589 $2,486