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Discontinued Operations (Assets and Liabilities held for sale related to discontinued operations) (Parenthetical) (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Discontinued Operations And Disposal Groups [Abstract]    
Accounts receivable $ 2,959 $ 0
Prepaid expenses 1,511 0
Other non-current assets $ 9,302 $ 0