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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Allowance for doubtful accounts $ 423 $ 166
Preferred stock, par value per share $ 0.10 $ 0.10
Preferred stock, shares authorized 400,000 400,000
Preferred stock, shares issued 0 0
Common stock, par value per share $ 0.10 $ 0.10
Common stock, shares authorized 40,000,000 40,000,000
Common stock, shares issued 31,638,225 31,550,477
Treasury stock, shares 2,450,634 2,450,634