Consolidated Balance Sheets (Parentheticals) - $ / shares	Jun. 28, 2020	Jun. 30, 2019
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, authorized (in shares)	10,000,000	10,000,000
Preferred stock, issued (in shares)	0	0
Common Class A [Member]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized (in shares)	200,000,000	200,000,000
Common stock, issued (in shares)	53,704,477	53,084,127
Treasury stock, shares (in shares)	17,963,551	17,209,093
Common Class B [Member]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized (in shares)	200,000,000	200,000,000
Common stock, issued (in shares)	33,822,823	33,822,823
Treasury stock, shares (in shares)	5,280,000	5,280,000