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Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Allowance for doubtful accounts receivable $ 617 $ 567
Preferred stock, par value (in dollars per share) $ 0.01 $ 0.01
Preferred stock, shares authorized (in shares) 1,000,000 1,000,000
Preferred stock, shares issued (in shares) 0 0
Preferred stock, shares outstanding (in shares) 0 0
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 20,000,000 20,000,000
Common stock, shares issued (in shares) 7,281,632 7,242,023
Common stock, shares outstanding (in shares) 7,252,073 7,212,464
Treasury stock, shares (in shares) 29,559 29,559