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Discontinued Operations - Cash Flow And Non-Cash Information (Details) - Luna Labs - Held-for-sale - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Depreciation and amortization $ 83 $ 147
Share-based compensation 97 88
Acquisition of property and equipment $ 24 $ 28