Unaudited Condensed Consolidated Balance Sheets (Parentheticals) - USD ($)	Sep. 30, 2022	Jun. 30, 2022
Reserve for doubtful accounts	$ 2,245	$ 2,214
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)	11,865,582	11,824,128
Treasury stock, shares (in shares)	16,118,696	16,160,150