Consolidated Balance Sheets (Parentheticals) - $ / shares	Jun. 28, 2020	Jun. 30, 2019
Preferred stock par value (in dollars per share)	$ 10	$ 10
Preferred stock, shares authorized (in shares)	2,000,000	2,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, shares authorized (in shares)	10,000,000	10,000,000
Common Class A [Member]
Common stock, shares issued (in shares)	3,746,454	3,746,454
Common stock, shares outstanding (in shares)	3,746,454	3,746,454
Common Class B [Member]
Common stock, shares issued (in shares)	1,414,517	1,414,517
Common stock, shares outstanding (in shares)	1,414,517	1,414,517