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Revenues and Trade Receivables, Net, Trade and other receivables, net (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Revenues and Trade Receivables, Net [Abstract]      
Trade receivables $ 18,619 $ 9,678  
Contract and other receivables 1,823 3,087  
Less: allowance for doubtful accounts (40) (40) $ (40)
Less: sales-related allowances (506) (605)  
Trade and other receivables, net $ 19,896 $ 12,120