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Consolidated Balance Sheets (Parenthetical) - $ / shares
Dec. 31, 2020
Dec. 31, 2019
Statement Of Financial Position [Abstract]    
Common shares, par value $ 0.01 $ 0.01
Common shares, authorized 200,000,000 200,000,000
Common shares, issued 39,197,991 38,631,991
Common shares, outstanding 39,197,991 38,631,991