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Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares
Sep. 30, 2020
Dec. 31, 2019
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 137,500,000 137,500,000
Class A    
Common stock, shares authorized 12,500,000 12,500,000
Common stock, shares issued 4,661,000 4,661,000
Common stock, shares outstanding 4,661,000 4,661,000
Class B    
Common stock, shares authorized 125,000,000 125,000,000
Common stock, shares issued 39,910,000 39,610,000
Common stock, shares outstanding 39,910,000 39,610,000
Restricted stock, shares outstanding 879,000 1,030,000