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Redemption of non-controlling interest (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Redeemable Noncontrolling Interest [Line Items]    
Non-controlling interests $ (732) $ (3,522)
Additional Paid-in Capital    
Redeemable Noncontrolling Interest [Line Items]    
Non-controlling interests $ 2,900  
Innodata Synodex, LLC    
Redeemable Noncontrolling Interest [Line Items]    
Non controlling interest redemption percentage 7.50%