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Discontinued Operation - Summary of Cash Flows (Details) - Discontinued Operations, Disposed of by Sale - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Net cash used in operating activities $ (1,806) $ (3,201)
Net cash used in investing activities $ 0 $ (42)