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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Statement of Financial Position [Abstract]    
Accounts receivable, allowance for doubtful accounts $ 1,102 $ 1,146
Preferred stock, par value (in dollars per share) $ 0.05 $ 0.05
Preferred stock, shares authorized 4,000,000 4,000,000
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0
Common stock, par value (in dollars per share) $ 0.05 $ 0.05
Common stock, shares authorized 25,000,000 25,000,000
Common stock, shares outstanding 14,769,342 14,496,359
Treasury stock, shares 39,783 2,378