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Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Allowance for doubtful accounts $ 791 $ 801
Accumulated depreciation and amortization $ 91,848 $ 86,244
Preferred stock, par value (in dollars per share) $ 0.01 $ 0.01
Preferred stock, shares authorized (in shares) 10,000,000 10,000,000
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) 15,000,000 15,000,000
Common stock, shares issued (in shares) 9,800,810 9,746,979
Common stock, shares outstanding (in shares) 9,800,810 9,746,979