Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Sep. 30, 2019	Jun. 30, 2019
Reserve for doubtful accounts	$ 1,765	$ 1,451
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)	12,373,209	12,334,607
Treasury stock, shares (in shares)	15,611,069	15,649,671