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Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2018	Jun. 30, 2018
Reserve for doubtful accounts	$ 1,660	$ 2,184
Common stock, par value (in dollars per share)	$ 1.50	$ 1.50
Common stock, shares authorized (in shares)	60,000,000	60,000,000
Common stock, shares issued (in shares)	27,982,115	27,982,115
Common stock, shares outstanding (in shares)	12,528,152	12,705,562
Treasury shares, share (in shares)	15,453,963	15,278,716

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A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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