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Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Income Statement [Abstract]        
Net (loss) income $ (434) $ 1,339 $ (769) $ (2,242)
  Comprehensive (loss) income $ (434) $ 1,339 $ (769) $ (2,242)