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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Allowance for doubtful accounts $ 880 $ 1,235
Preferred stock, par value $ 0.01 $ 0.01
Preferred stock, shares authorized 2,500,000 2,500,000
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 50,000,000 50,000,000
Common stock, shares issued 15,980,742 15,861,406
Treasury stock, shares at cost 446,587 327,577
Series A Preferred Stock [Member]    
Preferred stock, shares authorized 100,000 100,000
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0
Series B Preferred Stock [Member]    
Preferred stock, shares authorized 100,000 100,000
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0