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Unaudited Consolidated Balance Sheets - (Parentheticals) - $ / shares
Jun. 30, 2021
Dec. 31, 2020
Statement of Financial Position [Abstract]    
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 1,000,000,000 1,000,000,000
Common stock issued (in shares) 186,758,154 186,758,154
Common stock outstanding (in shares) 186,758,154 186,758,154