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Accrued Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Accrued Liabilities [Abstract]    
Salaries, employee benefits and related taxes $ 2,034 $ 1,716
Operating lease liabilities - current 229 370
Other 326 400
Accrued liabilities $ 2,589 $ 2,486