Note 2 - Investments - Fair Value Hierarchy (Details) - USD ($)	Dec. 30, 2018	Jul. 01, 2018
Fair Value, Inputs, Level 1 [Member]
Fair Value Hierarchy	$ 6,475,527	$ 6,641,650
Fair Value, Inputs, Level 2 [Member]
Fair Value Hierarchy	232,972	333,029
Fair Value, Inputs, Level 3 [Member]
Fair Value Hierarchy
Certificates of Deposit and Treasury Bill [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Hierarchy
Certificates of Deposit and Treasury Bill [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Hierarchy	232,972
Certificates of Deposit and Treasury Bill [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Hierarchy
Certificates of Deposit [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Hierarchy
Certificates of Deposit [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Hierarchy		333,029
Certificates of Deposit [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Hierarchy
Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Hierarchy	4,622,784	4,816,804
Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Hierarchy
Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Hierarchy
Mutual Fund [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Hierarchy	1,852,743	1,824,846
Mutual Fund [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Hierarchy
Mutual Fund [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Hierarchy