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Other Financial Information - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Property, Plant and Equipment [Line Items]      
Depreciation and amortization $ 100 $ 200  
Property and equipment, gross 3,897   $ 3,775
Assets under capital lease      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross $ 1,100   $ 800