Consolidated Statements of Stockholders' Equity (Unaudited) - 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
Cash dividends paid					(903,170)
Reclassification of unrealized gain on available available-for-sale securities from other comprehensive income to retained earnings				(2,102,745)	2,102,745
Net earnings for the quarter quarter					440,381
Balance (in shares) at Sep. 30, 2018	3,746,454	1,414,517
Balance at Sep. 30, 2018	$ 374,645	$ 141,452	7,854,108		15,650,681
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
Net earnings for the quarter quarter						$ 997,823
Balance (in shares) at Dec. 30, 2018	3,746,454	1,414,517
Balance at Dec. 30, 2018	$ 374,645	$ 141,452	7,854,108		15,304,953
Balance (in shares) at Sep. 30, 2018	3,746,454	1,414,517
Balance at Sep. 30, 2018	$ 374,645	$ 141,452	7,854,108		15,650,681
Cash dividends paid					(903,170)
Net earnings for the quarter quarter					557,442	557,442
Balance (in shares) at Dec. 30, 2018	3,746,454	1,414,517
Balance at Dec. 30, 2018	$ 374,645	$ 141,452	7,854,108		15,304,953
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					(903,170)
Net earnings for the quarter quarter					285,325
Balance (in shares) at Sep. 29, 2019	3,746,454	1,414,517
Balance at Sep. 29, 2019	$ 374,645	$ 141,452	7,854,108		14,932,116
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
Net earnings for the quarter quarter						1,163,000
Balance (in shares) at Dec. 29, 2019	3,746,454	1,414,517
Balance at Dec. 29, 2019	$ 374,645	$ 141,452	7,854,108		14,906,620	23,276,825
Balance (in shares) at Sep. 29, 2019	3,746,454	1,414,517
Balance at Sep. 29, 2019	$ 374,645	$ 141,452	7,854,108		14,932,116
Cash dividends paid					(903,171)
Net earnings for the quarter quarter					877,675	877,675
Balance (in shares) at Dec. 29, 2019	3,746,454	1,414,517
Balance at Dec. 29, 2019	$ 374,645	$ 141,452	$ 7,854,108		$ 14,906,620	$ 23,276,825