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Property and Equipment - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Property, Plant and Equipment [Line Items]      
Depreciation expense $ 0.4 $ 0.6  
Information technology      
Property, Plant and Equipment [Line Items]      
Costs associated with assets not yet placed into service $ 0.8   $ 0.7