Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($)	Sep. 27, 2020	Jun. 28, 2020
Land, buildings, and equipment, accumulated depreciation	$ 41,287,255	$ 41,039,447
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
Common Class A [Member]
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 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