Consolidated Statements of Stockholders' Equity - USD ($)	Common Stock [Member] Common Class A [Member]	Common Stock [Member] Common Class B [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Jul. 01, 2018	3,746,454	1,414,517
Balance at Jul. 01, 2018	$ 374,645	$ 141,452	$ 7,854,108	$ 2,102,745	$ 14,010,725
Reclassification from Accumulated Other Comprehensive Income to Retained Earnings Related to Equity Securities						$ 2,102,745
Balance (in shares) at Jul. 01, 2018	3,746,454	1,414,517
Balance at Jul. 01, 2018	$ 374,645	$ 141,452	7,854,108	2,102,745	14,010,725
Cash dividends paid					(2,709,511)
Accrued dividends declared June 18, 2019 payable August 21, 2019					(903,170)
Reclassification from Accumulated Other Comprehensive Income to Retained Earnings Related to Equity Securities				(2,102,745)	2,102,745
Net earnings for the year					3,049,172	3,049,172
Balance (in shares) at Jun. 30, 2019	3,746,454	1,414,517
Balance at Jun. 30, 2019	$ 374,645	$ 141,452	7,854,108		15,549,961	23,920,166
Cash dividends paid					(1,806,341)
Net earnings for the year					403,192	403,192
Balance (in shares) at Jun. 28, 2020	3,746,454	1,414,517
Balance at Jun. 28, 2020	$ 374,645	$ 141,452	$ 7,854,108		$ 14,146,812	$ 22,517,017