Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Mar. 31, 2019	Jun. 30, 2018
Reserve for doubtful accounts	$ 1,777	$ 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)	27,984,278	27,984,278
Common stock, shares outstanding (in shares)	12,531,735	12,705,562
Treasury shares, share (in shares)	15,452,543	15,278,716