Consolidated Balance Sheets - USD ($)	Jun. 28, 2020	Jun. 30, 2019
CURRENT ASSETS:
Cash and cash equivalents (Note 2)	$ 1,659,264	$ 269,844
Short-term investments (Note 3)	134,202	433,249
Marketable investment securities (Note 3)	5,216,218	7,029,916
Inventories	486,105	518,121
Prepaid expenses and other	523,662	740,476
Income taxes refundable	766,244	441,402
TOTAL CURRENT ASSETS	8,785,695	9,433,008
LAND, BUILDINGS & EQUIPMENT, net (Note 4)	17,667,517	18,141,526
OTHER ASSETS:
Right to use asset	1,812,937
Cash surrender value-life insurance	282,895	747,102
Other	64,265	67,315
TOTAL OTHER ASSETS	2,160,097	814,417
TOTAL ASSETS	28,613,309	28,388,951
CURRENT LIABILITIES:
Accounts payable	269,373	820,491
Accrued expenses	932,528	1,032,823
Dividends payable		903,170
Other current liabilities	395,629	308,794
TOTAL CURRENT LIABILITIES	1,597,530	3,065,278
LEASE LIABILITY	1,672,371
NOTE PAYABLE PPP LOAN	1,500,000
DEFERRED INCOME TAXES (Note 8)	1,326,391	1,403,507
TOTAL LIABILITIES	6,096,292	4,468,785
COMMITMENTS AND CONTINGENCIES (Note 6)
STOCKHOLDERS' EQUITY (Note 9)
Preferred stock, par value $10 a share: Authorized and unissued, 2,000,000 shares
Additional paid-in capital	7,854,108	7,854,108
Accumulated other comprehensive earnings- Unrealized gain on available-for-sale securities, net of tax
Retained earnings	14,146,812	15,549,961
TOTAL STOCKHOLDERS' EQUITY	22,517,017	23,920,166
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	28,613,309	28,388,951
Common Class A [Member]
STOCKHOLDERS' EQUITY (Note 9)
Common stock	374,645	374,645
Common Class B [Member]
STOCKHOLDERS' EQUITY (Note 9)
Common stock	$ 141,452	$ 141,452