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CONSOLIDATED BALANCE SHEETS (Parentheticals) - $ / shares
Mar. 31, 2021
Dec. 31, 2020
Statement Of Financial Position [Abstract]    
Preferred Stock, par value (in dollars per share) $ 0.01 $ 0.01
Preferred Shares Authorized 100,000,000 100,000,000
Preferred Shares Issued 0 0
Preferred Shares Outstanding 0 0
Common Stock, par value (in dollars per share) $ 0.01 $ 0.01
Common Stock Shares Authorized 500,000,000 500,000,000
Common Shares Issued 94,410,960 76,073,317
Common Shares Outstanding 94,410,960 76,073,317