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Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) - USD ($)
$ in Thousands
Jun. 30, 2024
Dec. 31, 2023
Accounts receivable allowance $ 2,567 $ 2,449
Driver's advances and other receivables, allowance $ 585 $ 591
Treasury stock, shares (in shares) 5,304,918 5,404,269
Common Class A [Member]    
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 40,000,000 40,000,000
Common stock, shares issued (in shares) 16,125,786 16,125,786
Common stock, shares outstanding (in shares) 10,820,868 10,721,517
Common Class B [Member]    
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 5,000,000 5,000,000
Common stock, shares issued (in shares) 2,350,000 2,350,000
Common stock, shares outstanding (in shares) 2,350,000 2,350,000