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Net Income (Loss) Per Common (Details) - shares
Sep. 30, 2021
Dec. 31, 2020
Sep. 30, 2020
Class Of Stock [Line Items]      
Preferred shares, issued 1,016,000 1,016,000  
Series1 Preferred Shares      
Class Of Stock [Line Items]      
Preferred shares, issued 1,016,000   1,016,000