CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parentheticals) - $ / shares	Dec. 31, 2020	Jun. 30, 2020
Statement Of Financial Position [Abstract]
Preferred stock, par value (in dollars per share)	$ 0.10	$ 0.10
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, shares authorized	80,000,000	80,000,000
Common stock, shares issued	42,663,000	42,525,000
Common stock, shares outstanding	25,231,000	25,093,000
Treasury stock, shares at cost	17,432,000	17,432,000