Note 2 - Investments - Summary of Investments (Details) - USD ($)	Dec. 29, 2019	Jun. 30, 2019
Short-term Investments [Member]
Fair Value	$ 134,153	$ 433,249
Cost Basis	134,153	433,249
Unrealized Gain
Equity Securities [Member]
Fair Value	5,684,527	5,100,341
Cost Basis	1,279,914	1,279,914
Unrealized Gain	4,404,613	3,820,427
Mutual Fund [Member]
Fair Value	956,956	1,929,575
Cost Basis	947,249	1,921,413
Unrealized Gain	$ 9,707	$ 8,162