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Consolidated Balance Sheets (Parenthetical) - $ / shares
shares in Thousands
Sep. 30, 2023
Dec. 31, 2022
Treasury stock (in shares) 86 86
Common Class A    
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 59,780 59,780
Common stock, shares issued (in shares) 9,517 9,337
Common stock, shares outstanding (in shares) 9,432 9,252
Common Class B    
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 220 220
Common stock, shares issued (in shares) 220 220
Common stock, shares outstanding (in shares) 220 220