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Property and Equipment (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Property, Plant and Equipment, Net, by Type [Abstract]    
Property and equipment, gross $ 349 $ 349
Accumulated depreciation (249) (184)
Property and equipment, net 100 165
Depreciation expense 100 200
Furniture and fixtures    
Property, Plant and Equipment, Net, by Type [Abstract]    
Property and equipment, gross 26 26
Computer equipment    
Property, Plant and Equipment, Net, by Type [Abstract]    
Property and equipment, gross 247 247
Leasehold improvements    
Property, Plant and Equipment, Net, by Type [Abstract]    
Property and equipment, gross $ 76 $ 76