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Common Stock and Preferred Stock - Non-Voting Common Stock Narrative (Details) - shares
Dec. 31, 2020
Dec. 31, 2019
Class of Stock [Line Items]    
Common stock, shares outstanding (in shares) 97,689,583 68,455,011
Series A Preferred Stock Purchase Rights    
Class of Stock [Line Items]    
Common stock, shares outstanding (in shares) 0 0