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Disposals and Discontinued Operations - Summary of Cash Flows Generated by Discontinued Operations (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Discontinued Operations And Disposal Groups [Abstract]    
Net cash provided by (used in) operating activities $ (627) $ 2,005
Net cash provided by (used in) investing activities (1,679) 2,073
Net cash provided by financing activities 3,503  
Cash flows from discontinued operations $ 1,197 $ 4,078