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Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares
Dec. 31, 2018
Jun. 30, 2018
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 30,000,000 30,000,000
Common stock, shares issued (in shares) 6,357,113 6,153,266
Common stock, shares outstanding (in shares) 6,357,113 6,153,266